论激光推进技术在助推飞机方面的应用和民用技术军用化

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大家都知道海上发射,激光推进,高斯炮是三大未来轨道质量传送方法。已经被NASA列为地球卫星和登月探测所倚重的最主要的发射技术。问题是鹰酱走的这么远,我们追得上吗?还好,按照我朝的传统,先军政治是毫无疑问的,主题思想也要发扬光大。多做洛夫理论,三个代表,科学发展观,中国梦,一个都不能少。所以综上所述,我们要紧追王师,一点都不能落下,老话畅谈,安逸与长久自然呆多,懒惰使人愚钝。不思进取自然落后,落后自然挨打,挨打自然削弱,削弱必然灭亡,国家不存,种族何在。学习第一流的合众国,我们就可以变成德国日本这种二流或。学习德国日本,我们就会变成英意大利尔罗斯这种3留货。学习英饿这种3流,我们就会变成印度南非巴西这种4留货。学习印巴中国就会变成亚非拉的五流货。到后来自然是没落衰退而消失于文明世界。
   

   大家都知道激光在军事上的用途,猪妖有4类,i类是信号用途,比如火控瞄准和武警人群致盲系统。ii类是软杀伤,扮演诱饵和瘫痪制导的能力。比如飞机上的DIRCOM, 各种各样的坦克主动防御系统。这种成熟的作品。 iii类是硬杀伤系统,如美国海军USS Ponce上的的自由电子激光
,以色列人的M-THEL, 波音的固体激光。不胜枚举。................................... ....................... .  iv类目前是一种民用技术,NASA投巨资开发的激光推进技术。用来发射卫星和火星探测器脱离地球的束缚、

   激光推进所依仗的是一个光能量传送体,目前主要有两种方法。第一种是加快传统推进剂的效率。这是保守的技术路线,风险最小,投入相比较小,难度和技术复杂性都更容易被人类接受。
而第二种方法是直接推进,原理极端复杂。到现在也只是实验室阶段、实用还完全不可接受。

   我们都知道传统航母使用蒸汽弹射和电磁弹射(高斯炮)发射飞机。在未来激光推进的两种主流形式能够走出实验室的时候,我们的航母上面能不能考研使用激光推进技术去发射大型飞机呢?

大家都知道海上发射,激光推进,高斯炮是三大未来轨道质量传送方法。已经被NASA列为地球卫星和登月探测所倚重的最主要的发射技术。问题是鹰酱走的这么远,我们追得上吗?还好,按照我朝的传统,先军政治是毫无疑问的,主题思想也要发扬光大。多做洛夫理论,三个代表,科学发展观,中国梦,一个都不能少。所以综上所述,我们要紧追王师,一点都不能落下,老话畅谈,安逸与长久自然呆多,懒惰使人愚钝。不思进取自然落后,落后自然挨打,挨打自然削弱,削弱必然灭亡,国家不存,种族何在。学习第一流的合众国,我们就可以变成德国日本这种二流或。学习德国日本,我们就会变成英意大利尔罗斯这种3留货。学习英饿这种3流,我们就会变成印度南非巴西这种4留货。学习印巴中国就会变成亚非拉的五流货。到后来自然是没落衰退而消失于文明世界。
   

   大家都知道激光在军事上的用途,猪妖有4类,i类是信号用途,比如火控瞄准和武警人群致盲系统。ii类是软杀伤,扮演诱饵和瘫痪制导的能力。比如飞机上的DIRCOM, 各种各样的坦克主动防御系统。这种成熟的作品。 iii类是硬杀伤系统,如美国海军USS Ponce上的的自由电子激光
,以色列人的M-THEL, 波音的固体激光。不胜枚举。................................... ....................... .  iv类目前是一种民用技术,NASA投巨资开发的激光推进技术。用来发射卫星和火星探测器脱离地球的束缚、

   激光推进所依仗的是一个光能量传送体,目前主要有两种方法。第一种是加快传统推进剂的效率。这是保守的技术路线,风险最小,投入相比较小,难度和技术复杂性都更容易被人类接受。
而第二种方法是直接推进,原理极端复杂。到现在也只是实验室阶段、实用还完全不可接受。

   我们都知道传统航母使用蒸汽弹射和电磁弹射(高斯炮)发射飞机。在未来激光推进的两种主流形式能够走出实验室的时候,我们的航母上面能不能考研使用激光推进技术去发射大型飞机呢?

美国搞的等离子推进据说很厉害,推进速度快。比现在快好几倍,用于到像火星之类的地方
美国搞的等离子推进据说很厉害,推进速度快。比现在快好几倍,用于到像火星之类的地方
非子默 发表于 2015-3-1 20:59
美国搞的等离子推进据说很厉害,推进速度快。比现在快好几倍,用于到像火星之类的地方
论文拿出来看看
非子默 发表于 2015-3-1 20:59
美国搞的等离子推进据说很厉害,推进速度快。比现在快好几倍,用于到像火星之类的地方
等离子推进速度根本不是强项好吧
激光那推力,只适合卫星等航天器在大气层外无重力环境下调姿和转移轨道用用。。。用大气层内飞机上?
激光推进的原理:

  激光推进的概念是有4位研究学者在上个世纪提出来的,奥地利人 Eugene Sanger  匈牙利人Georgii Marx 美国佬 Arthur Kantrowitz 和另一位Wolfgang Moekel 。

主要模型有

   光压(也叫太阳帆)
   热火箭

在2002年,一个日本的研究团队实现了一个技术演示:用一束激光驱动一个携带了一个水罐的小的铝合金飞机,使尾流蒸汽化从而飞行了一段距离。2003年NASA的一个研究团队实现推进一个 312克 航空模型,这个模型具有太阳能光伏面板,面板被一束强激光照射,飞机飞行了一段距离。


激光推进的原理:

  激光推进的概念是有4位研究学者在上个世纪提出来的,奥地利人 Eugene Sanger  匈牙利人Georgii Marx 美国佬 Arthur Kantrowitz 和另一位Wolfgang Moekel 。

主要模型有

   光压(也叫太阳帆)
   热火箭

在2002年,一个日本的研究团队实现了一个技术演示:用一束激光驱动一个携带了一个水罐的小的铝合金飞机,使尾流蒸汽化从而飞行了一段距离。2003年NASA的一个研究团队实现推进一个 312克 航空模型,这个模型具有太阳能光伏面板,面板被一束强激光照射,飞机飞行了一段距离。

激光绝热推进:
Ablative Laser Propulsion (ALP)我们需要产生 一个外部激光束燃烧固体金属推进剂 来生成一个有效的电浆火炬, 试验中得到的数据表明 小型化的ALP装置给定推动力能够到达5000 s (49 kN·s/kg),  不像 lightcraft ( Leik Myrabo 开发的)使用空气作为推进剂,ALP能够使用在外层空间。


Material is directly removed from a solid or liquid surface at high velocities by laser ablation by a pulsed laser. Depending on the laser flux and pulse duration, the material can be simply heated and evaporated, or converted to plasma. Ablative propulsion will work in air or vacuum. Specific impulse values from 200 seconds to several thousand seconds are possible by choosing the propellant and laser pulse characteristics. Variations of ablative propulsion include double-pulse propulsion in which one laser pulse ablates material and a second laser pulse further heats the ablated gas, laser micropropulsion in which a small laser on board a spacecraft ablates very small amounts of propellant for attitude control or maneuvering, and space debris removal, in which the laser ablates material from debris particles in low Earth orbit, changing their orbits and causing them to reenter.

University of Alabama Huntsville 推进研发中心(Propulsion Research Center)开发了这种引擎。

脉冲电浆推进
A high energy pulse focused in a gas or on a solid surface surrounded by gas produces breakdown of the gas (usually air). This causes an expanding shock wave which absorbs laser energy at the shock front (a laser sustained detonation wave or LSD wave); expansion of the hot plasma behind the shock front during and after the pulse transmits momentum to the craft. Pulsed plasma propulsion using air as the working fluid is the simplest form of air-breathing laser propulsion. The record-breaking Lightcraft, developed by Leik Myrabo of RPI (Rensselaer Polytechnic Institute) and Frank Mead, works on this principle.

Another concept of pulsed plasma propulsion is being investigated by Prof. Hideyuki Horisawa。

持久电浆推进
A continuous laser beam focused in a flowing stream of gas creates a stable laser sustained plasma which heats the gas; the hot gas is then expanded through a conventional nozzle to produce thrust. Because the plasma does not touch the walls of the engine, very high gas temperatures are possible, as in gas core nuclear thermal propulsion. However, to achieve high specific impulse, the propellant must have low molecular weight; hydrogen is usually assumed for actual use, at specific impulses around 1000 seconds. CW plasma propulsion has the disadvantage that the laser beam must be precisely focused into the absorption chamber, either through a window or by using a specially-shaped nozzle. CW plasma thruster experiments were performed in the 1970s and 1980s, primarily by Dr. Dennis Keefer of UTSI and Prof. Herman Krier of the University of Illinois at Urbana-Champaign.

热交换器 推进引擎

HX thruster

The laser beam heats a solid heat exchanger, which in turn heats an inert liquid propellant, converting it to hot gas which is exhausted through a conventional nozzle. This is similar in principle to nuclear thermal and solar thermal propulsion. Using a large flat heat exchanger allows the laser beam to shine directly on the heat exchanger without focusing optics on the vehicle. The HX thruster has the advantage of working equally well with any laser wavelength and both CW and pulsed lasers, and of having an efficiency approaching 100%. The HX thruster is limited by the heat exchanger material and by radiative losses to relatively low gas temperatures, typically 1000 - 2000 C, but with hydrogen propellant, that provides sufficient specific impulse (600 – 800 seconds) to allow single stage vehicles to reach low Earth orbit. The HX laser thruster concept was developed by Jordin Kare in 1991;[7] a similar microwave thermal propulsion concept was developed independently by Kevin L. Parkin at Caltech in 2001.

A variation on this concept was proposed by Prof. John Sinko and Dr. Clifford Schlecht as a redundant safety concept for assets on orbit.[8] Packets of enclosed propellants are attached to the outside of a space suit, and exhaust channels run from each packet to the far side of the astronaut or tool. A laser beam from a space station or shuttle vaporizes the propellant inside the packs. Exhaust is directed behind the astronaut or tool, pulling the target towards the laser source. To brake the approach, a second wavelength is used to ablate the exterior of the propellant packets on the near side.

激光 -电 二元推进
A general class of propulsion techniques in which the laser beam power is converted to electricity, which then powers some type of electric propulsion thruster.

A small quadcopter has flown for 12 hours and 26 minutes charged by a 2.25 kW laser (powered at less than half of its normal operating current), using 170 watt photovoltaic arrays as the power receiver,[9] and a laser has been demonstrated to charge the batteries of an unmanned aerial vehicle in flight for 48 hours.

For spacecraft, laser electric propulsion is considered as a competitor to solar electric or nuclear electric propulsion for low-thrust propulsion in space. However, Leik Myrabo has proposed high-thrust laser electric propulsion, using magnetohydrodynamics to convert laser energy to electricity and to electrically accelerate air around a vehicle for thrust.

光子-激光 推进器
PLT
A photonic laser thruster (PLT) is a pure photon laser thruster that amplifies photon radiation pressure by orders of magnitude by exploiting an active resonant optical cavity formed between two mirrors on nearby paired spacecraft.[11] PLT is predicted to be able to provide the thrust to power ratio (a measure of how efficient a thruster is in terms of converting power to thrust) approaching that of conventional thrusters, such as laser ablation thrusters and electrical thrusters.


光压方法:

A beam could also be used to provide impulse by directly "pushing" on the sail.

One example of this would be using a solar sail to reflect a laser beam. This concept, called a laser-pushed lightsail, was analyzed by physicist Robert L. Forward in 1989[3] as a method of Interstellar travel that would avoid extremely high mass ratios by not carrying fuel. His work elaborated on a proposal initially made by Marx.[4] Further analysis of the concept was done by Landis,[5][6] Mallove and Matloff,[7] Andrews[8] and others.

In a later paper, Forward proposed pushing a sail with a microwave beam.[9] This has the advantage that the sail need not be a continuous surface. Forward tagged his proposal for an ultralight sail "Starwisp". A later analysis by Landis[10] suggested that the Starwisp concept as originally proposed by Forward would not work, but variations on the proposal continue to be proposed.

The beam has to have a large diameter so that only a small portion of the beam misses the sail due to diffraction and the laser or microwave antenna has to have a good pointing stability so that the craft can tilt its sails fast enough to follow the center of the beam. This gets more important when going from interplanetary travel to interstellar travel, and when going from a fly-by mission, to a landing mission, to a return mission. The laser or the microwave sender would probably be a large phased array of small devices, which get their energy directly from solar radiation. The size of the array obsoletes any lens or mirror.

Another beam-pushed concept would be to use a magnetic sail or MMPP sail to divert a beam of charged particles from a particle accelerator or plasma jet.[11] Jordin Kare has proposed a variant to this whereby a "beam" of small laser accelerated light sails would transfer momentum to a magsail vehicle.

Another beam-pushed concept uses ordinary matter and works in vacuum. The matter from a stationary mass-driver is "reflected" by the spacecraft, cf. mass driver. The spacecraft neither needs energy nor reaction mass for propulsion of its own.


太长了,先拷这点翻译。以后再加。睡觉了。

激光推进的原理:

  激光推进的概念是有4位研究学者在上个世纪提出来的,奥地利人 Eugene Sanger  匈牙利人Georgii Marx 美国佬 Arthur Kantrowitz 和另一位Wolfgang Moekel 。

主要模型有

   光压(也叫太阳帆)
   热火箭

在2002年,一个日本的研究团队实现了一个技术演示:用一束激光驱动一个携带了一个水罐的小的铝合金飞机,使尾流蒸汽化从而飞行了一段距离。2003年NASA的一个研究团队实现推进一个 312克 航空模型,这个模型具有太阳能光伏面板,面板被一束强激光照射,飞机飞行了一段距离。

激光绝热推进:
Ablative Laser Propulsion (ALP)我们需要产生 一个外部激光束燃烧固体金属推进剂 来生成一个有效的电浆火炬, 试验中得到的数据表明 小型化的ALP装置给定推动力能够到达5000 s (49 kN·s/kg),  不像 lightcraft ( Leik Myrabo 开发的)使用空气作为推进剂,ALP能够使用在外层空间。


Material is directly removed from a solid or liquid surface at high velocities by laser ablation by a pulsed laser. Depending on the laser flux and pulse duration, the material can be simply heated and evaporated, or converted to plasma. Ablative propulsion will work in air or vacuum. Specific impulse values from 200 seconds to several thousand seconds are possible by choosing the propellant and laser pulse characteristics. Variations of ablative propulsion include double-pulse propulsion in which one laser pulse ablates material and a second laser pulse further heats the ablated gas, laser micropropulsion in which a small laser on board a spacecraft ablates very small amounts of propellant for attitude control or maneuvering, and space debris removal, in which the laser ablates material from debris particles in low Earth orbit, changing their orbits and causing them to reenter.

University of Alabama Huntsville 推进研发中心(Propulsion Research Center)开发了这种引擎。

脉冲电浆推进
A high energy pulse focused in a gas or on a solid surface surrounded by gas produces breakdown of the gas (usually air). This causes an expanding shock wave which absorbs laser energy at the shock front (a laser sustained detonation wave or LSD wave); expansion of the hot plasma behind the shock front during and after the pulse transmits momentum to the craft. Pulsed plasma propulsion using air as the working fluid is the simplest form of air-breathing laser propulsion. The record-breaking Lightcraft, developed by Leik Myrabo of RPI (Rensselaer Polytechnic Institute) and Frank Mead, works on this principle.

Another concept of pulsed plasma propulsion is being investigated by Prof. Hideyuki Horisawa。

持久电浆推进
A continuous laser beam focused in a flowing stream of gas creates a stable laser sustained plasma which heats the gas; the hot gas is then expanded through a conventional nozzle to produce thrust. Because the plasma does not touch the walls of the engine, very high gas temperatures are possible, as in gas core nuclear thermal propulsion. However, to achieve high specific impulse, the propellant must have low molecular weight; hydrogen is usually assumed for actual use, at specific impulses around 1000 seconds. CW plasma propulsion has the disadvantage that the laser beam must be precisely focused into the absorption chamber, either through a window or by using a specially-shaped nozzle. CW plasma thruster experiments were performed in the 1970s and 1980s, primarily by Dr. Dennis Keefer of UTSI and Prof. Herman Krier of the University of Illinois at Urbana-Champaign.

热交换器 推进引擎

HX thruster

The laser beam heats a solid heat exchanger, which in turn heats an inert liquid propellant, converting it to hot gas which is exhausted through a conventional nozzle. This is similar in principle to nuclear thermal and solar thermal propulsion. Using a large flat heat exchanger allows the laser beam to shine directly on the heat exchanger without focusing optics on the vehicle. The HX thruster has the advantage of working equally well with any laser wavelength and both CW and pulsed lasers, and of having an efficiency approaching 100%. The HX thruster is limited by the heat exchanger material and by radiative losses to relatively low gas temperatures, typically 1000 - 2000 C, but with hydrogen propellant, that provides sufficient specific impulse (600 – 800 seconds) to allow single stage vehicles to reach low Earth orbit. The HX laser thruster concept was developed by Jordin Kare in 1991;[7] a similar microwave thermal propulsion concept was developed independently by Kevin L. Parkin at Caltech in 2001.

A variation on this concept was proposed by Prof. John Sinko and Dr. Clifford Schlecht as a redundant safety concept for assets on orbit.[8] Packets of enclosed propellants are attached to the outside of a space suit, and exhaust channels run from each packet to the far side of the astronaut or tool. A laser beam from a space station or shuttle vaporizes the propellant inside the packs. Exhaust is directed behind the astronaut or tool, pulling the target towards the laser source. To brake the approach, a second wavelength is used to ablate the exterior of the propellant packets on the near side.

激光 -电 二元推进
A general class of propulsion techniques in which the laser beam power is converted to electricity, which then powers some type of electric propulsion thruster.

A small quadcopter has flown for 12 hours and 26 minutes charged by a 2.25 kW laser (powered at less than half of its normal operating current), using 170 watt photovoltaic arrays as the power receiver,[9] and a laser has been demonstrated to charge the batteries of an unmanned aerial vehicle in flight for 48 hours.

For spacecraft, laser electric propulsion is considered as a competitor to solar electric or nuclear electric propulsion for low-thrust propulsion in space. However, Leik Myrabo has proposed high-thrust laser electric propulsion, using magnetohydrodynamics to convert laser energy to electricity and to electrically accelerate air around a vehicle for thrust.

光子-激光 推进器
PLT
A photonic laser thruster (PLT) is a pure photon laser thruster that amplifies photon radiation pressure by orders of magnitude by exploiting an active resonant optical cavity formed between two mirrors on nearby paired spacecraft.[11] PLT is predicted to be able to provide the thrust to power ratio (a measure of how efficient a thruster is in terms of converting power to thrust) approaching that of conventional thrusters, such as laser ablation thrusters and electrical thrusters.


光压方法:

A beam could also be used to provide impulse by directly "pushing" on the sail.

One example of this would be using a solar sail to reflect a laser beam. This concept, called a laser-pushed lightsail, was analyzed by physicist Robert L. Forward in 1989[3] as a method of Interstellar travel that would avoid extremely high mass ratios by not carrying fuel. His work elaborated on a proposal initially made by Marx.[4] Further analysis of the concept was done by Landis,[5][6] Mallove and Matloff,[7] Andrews[8] and others.

In a later paper, Forward proposed pushing a sail with a microwave beam.[9] This has the advantage that the sail need not be a continuous surface. Forward tagged his proposal for an ultralight sail "Starwisp". A later analysis by Landis[10] suggested that the Starwisp concept as originally proposed by Forward would not work, but variations on the proposal continue to be proposed.

The beam has to have a large diameter so that only a small portion of the beam misses the sail due to diffraction and the laser or microwave antenna has to have a good pointing stability so that the craft can tilt its sails fast enough to follow the center of the beam. This gets more important when going from interplanetary travel to interstellar travel, and when going from a fly-by mission, to a landing mission, to a return mission. The laser or the microwave sender would probably be a large phased array of small devices, which get their energy directly from solar radiation. The size of the array obsoletes any lens or mirror.

Another beam-pushed concept would be to use a magnetic sail or MMPP sail to divert a beam of charged particles from a particle accelerator or plasma jet.[11] Jordin Kare has proposed a variant to this whereby a "beam" of small laser accelerated light sails would transfer momentum to a magsail vehicle.

Another beam-pushed concept uses ordinary matter and works in vacuum. The matter from a stationary mass-driver is "reflected" by the spacecraft, cf. mass driver. The spacecraft neither needs energy nor reaction mass for propulsion of its own.


太长了,先拷这点翻译。以后再加。睡觉了。
海深蓝 发表于 2015-3-1 22:38
激光那推力,只适合卫星等航天器在大气层外无重力环境下调姿和转移轨道用用。。。用大气层内飞机上?{:152: ...
NASA 研究的是把运载体送到位于太空的轨道上。不过现在当然没做出来。不过你找个老八路军问问,一个小铁盒子能一瞬间杀死20万人吗?他肯定说不能。
等离子推进和激光推进只是比冲高,但耗电量非常大,推力非常低,只适合用于深空探索。军用也就卫星变轨可能会用,其它的完全看不到应用前景
论文拿出来看看
美科学家研制等离子火箭或将缩短前往火星时间
http://www.sina.com.cn2009年11月24日14:02新浪科技

美国科学家研制造等离子火箭

等离子驱动的VX-200
  新浪科技讯 北京时间11月24日消息,据《环球邮报》报道,前美国宇航员张福林(Franklin Chang-Diaz)对他的火箭抱有很高的期望,希望它能成为一名“外太空信使”、清除轨道碎片的垃圾车、最终前往火星的交通工具。这位在哥斯达黎加出生的物理学家认为,将来人类会全部搬迁到外太空,我们可爱的地球将变成一个“受保护的公园”。

  大大缩短前往火星的时间

  张福林现任艾德·阿斯特拉火箭公司(Ad Astra Rocket Company)总裁和CEO。他表示:“未来,我们的重孙们可以经常从他们的新居住地回到(地球),看一看他们的祖先生活的地方和他们祖先的文化诞生地。”

  很多人可能都认为这种想法太怪诞,根本经不起实际考验。但是张福林已经摘掉他的太空头盔,着手进行这方面的研究。如果让他的梦想变成现实的话,那么,他认为在他有生之年,人类将会利用他公司的创新性火箭,在银河系遨游。

  他表示,他的等离子火箭还有很多其他实际用途。这种被称作全功率可变比冲的磁等离子火箭(Variable-specific-impulse magnetoplasma rocket,VASIMR)采用的是美国宇航局曾经研究过的高功率技术(high-power technology)。这种火箭利用太阳附近的高温气体作为推进剂,因此将大大缩短它从地球前往火星所需的时间,从大约8个月缩短到仅仅39天。

  这种火箭还将把太空旅行的成本缩减一半以上、掀起航空航天业革命、为更多国家(包括他的祖国哥斯达黎加)的太空探索活动铺平道路。他打算使等离子推进器VX-200逐渐发展成可以在国际空间站上使用的火箭。今年9月,该火箭在地球上达到新的转折点。在一项试验过程中,发送机的功率超过了200千瓦,使它成为目前世界上最强大的电火箭。

  打算作为商用火箭

  在地球上进行的试验结束后,艾德·阿斯特拉火箭公司目前正在跟美国宇航局合作,打算在2013年把全功率可变比冲的磁等离子火箭发射到国际空间站。张福林表示,最终他的这项技术将被用来确保空间站位于既定轨道。

  该公司打算在2014年发射这种商用火箭。这听起来似乎比科幻小说还离奇,但是航天领域目前已经开始关注张福林的工作。最近美国航空航天学会(AIAA)指定全功率可变比冲的磁等离子体火箭是2009年出现的十大航天技术之一。

  在实施火星任务之前,张福林提出了这种火箭在地球附近的一些实际用途。例如它在外太空可以充当敦豪速递公司一样的角色,等离子推进器飞船会以更低的价格把包裹、主要燃料运往人造卫星或飞船。据张福林说,现在的货运费超过10亿美元,如果照此计算,艾德·阿斯特拉火箭公司的飞船大约需要5亿美元运费。他还提到另一种应用途径:飞往更靠近他祖国的心脏地带。用这些船只清理废弃人造卫星留下的太空碎片。

  地球就像一个大蜂窝

  张福林说:“事实上地球已经变成一个蜂窝。大量人造卫星围绕地球运行。我们正在讨论无数这种天体。其中一些只是漂浮在太空里的垃圾,因为这些人造卫星耗尽了燃料,它们不再运行,不过仍停留在轨道里。”废弃太空天体相互撞击,或者与我们的地球撞在一起。“你认为你看到的是美丽的流星,但事实上它们是来自地球的轨道垃圾,最终会在大气层里燃烧掉。”

  张福林表示:“我们的目标是拥有一辆‘垃圾车’,用来清除不同轨道里的这种天体。这种工作显然很有意义。”艾德·阿斯特拉火箭公司把这些碎片抛入“轨道墓地”,“或者我们把它们抛向太阳,让它们朝着太阳前进,奔向最终的宇宙垃圾场。”

  跟常规化学火箭不同,这种火箭把氩转变成等离子体,这是第四种物质状态,人们经常会在每天发生的闪电、温度极高的火焰、星云、太阳和其他恒星里发现等离子体。当然,这种物质温度很高,人类几乎无法应对它们。

  张福林解释说:“目前没有任何一种已知材料可以承受如此高温。因此我们不用原料,而是利用非常奇特的力生成这种无形的管道,使等离子体在无形管道内部达到极高温度。这种力是由非常先进的永磁发电机产生的。”

  等离子火箭的研制者

  也许大部分美国人都不知道张福林,但是在他的祖国哥斯达黎加,他是家喻户晓的知名人物。因为该国除他以外,没有一个人曾进入天空。张福林在1980年进入美国宇航局后,曾7次搭乘航天飞机进入太空。他在2005年成立艾德·阿斯特拉火箭公司以前,还曾担任美国宇航局先进太空推进实验室(Advanced Space Propulsion Laboratory)主管。

  他的成功来之不易。1968年他迁移18次,张福林在越战失败和祖国的种族战争进行的如火如荼之时,来到美国。虽然由于他拥有部分中国血统,小时候在哥斯达黎加经常受到嘲弄,但是他表示,这根本无法与他之后在美国受到的歧视相提并论。

  张福林说:“虽然美国存在很多动乱、歧视和社会斗争,但是我看到一个天生具有自我疗伤能力的国家,这是我在拉丁美洲的其他国家都不曾看到的。”他表示,他的一些成功机会来自于民权运动取得的进展。张福林在康涅狄格州哈特福德完成中学学业后,他从康涅狄格大学获得机械工程学位,然后进入麻省理工学院,并于1977年获得应用等粒子物理学博士学位,同年成为美国公民。

  他经常往来于德克萨斯州和哥斯达黎加的艾德·阿斯特拉火箭公司实验室。但是他在祖国建设的企业存在一个特殊弱点。他说:“回到了祖国就像久别回家,有种经过长途旅行重新归来的感觉。”他表示,他可以在瓜纳卡斯特(Guanacaste)的丛林中建造一枚火箭。(孝文) 论文没,这里有介绍。另外百度。我是电视里看到的
海深蓝 发表于 2015-3-1 22:38
激光那推力,只适合卫星等航天器在大气层外无重力环境下调姿和转移轨道用用。。。用大气层内飞机上?{:152: ...
就那点光压~太不靠谱了~记得实验是加热空气上升的~
非子默 发表于 2015-3-2 20:16
美科学家研制等离子火箭或将缩短前往火星时间
http://www.sina.com.cn2009年11月24日14:02新浪科技
这种靠太阳风提供燃料高温的环境的技术,和我说的在地面上用激光阵列加热是两种完全不同的东西啊!完全没关系啊!
740159711 发表于 2015-3-2 21:02
就那点光压~太不靠谱了~记得实验是加热空气上升的~
相像一下传统涡扇引擎,要起飞的时候开加力到100%, 燃料温度受限于环境,不可能超过一个极限。因此输出功率被限制到一个台阶,通过激光热火箭技术,就能预先提供一个高温坏境,加快燃料转换效率。有点像三相热核炸弹的原理。通过裂变的高温来保证下一步主要过程。

如果是直接推进,可能就需要极高功率的激光,但是考虑到激光的相干性。没有任何其他一种高效率源的能量转换效率是如此地高,所以这个也不是很遥远的事情。
什么人都可以出来论啥啥的,总得做了真正的研究才能论吧,不是网上看一下,百度一下就可以论的
liruyuan1988 发表于 2015-3-2 09:58
等离子推进和激光推进只是比冲高,但耗电量非常大,推力非常低,只适合用于深空探索。军用也就卫星变轨可能 ...
看得到前景的还用得着 你来研究吗?咱就烂大街了。你存在的意义,就是把没有前景的东西变成有前景的
cjdby.net/junbeidongtai/2012-12-07/military-1693.html


我国激光推进及其应用国家重点实验室揭牌
超大军事 发布于:2012-12-07 17:05:56 作者:超大军事 来源:中国国防部 阅读:1551次
本文地址:
关键词:激光推进

国防部网北京12月7日电 (董力源、记者张晓祺)报道:航天发射不再依赖化学火箭,也许不是梦想!我国首个激光推进及其应用国家重点实验室今天在装备学院揭牌成立。这标志着我国已迈出探索新型高效航空航天推进技术研究的坚实步伐。

“激光推进及其应用国家重点实验室由科技部批准立项建设,是我国首个激光与航空航天交叉领域的实验室。”实验室主任、博士生导师洪延姬介绍,“实验室在国际上率先提出激光推进能量转化的重大机理,并实现了部分研究成果的转化应用。”

激光推进是利用远距离高能激光加热气体工质,使气体热膨胀产生推力,推动飞行器前进的新概念推进技术,具有比冲高、有效载荷比大、发射成本低等优点,可广泛用于微小卫星近地轨道发射、地球轨道碎片清除、微小卫星姿态和轨道控制等领域。应用于卫星近地轨道发射时,可使发射成本降低至每千克几百美元,远远低于目前化学火箭每千克上万美元的发射成本,因而受到各国广泛关注。

据介绍,目前实验室已拥有由中国科学院院士、科技领军人才和中青年学术专家组成的科技创新团队,主要开展激光推进应用基础、等离子体流动控制与推进技术、推进流场测试和诊断技术等方面的研究。实验室的成立,将有力推动我国空天飞行推进新技术基础理论研究、前沿技术创新和科研成果推广,为我国空天飞行推进新技术创新发展提供重要保障。
看得到前景的还用得着 你来研究吗?咱就烂大街了。你存在的意义,就是把没有前景的东西变成有前景的
看不到前景的东西,那叫骗经费。玄幻小说里都看不到前景,你去骗经费吧
我的存在意义轮不到你多嘴
这么高端........