蓝色起源完成BE-3验收，年内进行亚轨道飞船测试

来源：百度文库编辑：超级军网时间：2024/04/28 16:17:39

BE-3采用抽气循环，9到50吨推力可调，迄今共进行了450次点火，试车时间累积30000秒。性能接近YF77，但是节流能力极强。这也是美国近十年完成研制的唯一一种氢氧火箭发动机。

这次不会有人质疑蓝色起源有无完成BE-4研发的实力了吧……{:soso_e100:} 另外这也是亚马逊对贝宝的另一个胜利{:soso_e144:}

Blue Origin to Begin New Shepard Flight Tests Later This Year
April 7, 2015, at 10:01 am
in News
- See more at: http://www.parabolicarc.com/2015 ... thash.wKwFON8e.dpuf

Blue Origin plans to begin flight tests of its reusable suborbital New Shepard vehicle later this year from its West Texas facility, President Rob Meyerson said today.
The company also announced that it had completed acceptance testing on the BE-3 hydrogen engine that will power the suborbital capsule. The company said the engine has been fired for more than 30,000 seconds during 450 tests.
Meyerson said the BE-3 is now available on the commercial market for other uses. The company also has plans to develop an upper-stage variant called the BE-3U.
The BE-3 engine is the first new hydrogen-powered rocket motor to be developed in the United States in more than a decade. It is a reusable engine that can be throttled for powered vertical landings, Meyerson said.
New Shepard is a suborbital vehicle capable of flying three or more astronauts and scientific payloads. The booster stage takes off and lands vertically using the BE-3 engine. The New Shepard capsule lands under parachutes.
New Shepard can be flown autonomously. Meyerson said the company will fly the vehicle dozens of times before putting test pilots aboard.
Blue Origin hopes to get dozens if not hundreds flights out of each New Shepard vehicle, allowing people to experience space travel. The company is using the suborbital flights as a test bed for an orbital crewed system.
Occupants will have about four minutes of weightlessness on a suborbital flight that will last less than 15 minutes, he added. New Shepard will fly above the Karman line of 100 km (62.1 miles), which is the internationally accepted boundary of space.
Blue Origin is still several years away from selling tickets for New Shepard suborbital flights, which will fly from the company’s West Texas location.
Meyerson also said Blue Origin’s larger BE-4 engine would begin full-scale tests in 2016, with plans to compete testing the following year. United Launch Alliance (ULA) plans to use the engine in the first stage of a new booster it is developing.
Congress has ordered ULA to end its dependence on Russian-built RD-180 engines for the Atlas V launch vehicle by 2019. Meyerson said the BE-4 will be ready at least two years prior to any U.S. alternative.
The company has been conducting sub-scale BE-4 tests involving the engine’s fuel injector and power pack, Meyerson said. Those tests have been on-going for months.
For its future orbital operations, Blue Origin has been looking at potential locations in several states, including Florida, he added.
The company also has continued a commercial crew agreement with NASA on an unfunded basis. Blue Origin has three additional milestones to complete.
- See more at: http://www.parabolicarc.com/2015 ... thash.wKwFON8e.dpuf

关于蓝色起源
http://www.blueorigin.com
关于蓝色起源创始者贝佐斯……呃……这个不用介绍了，大家可能比我还了解他……

BE-3采用抽气循环，9到50吨推力可调，迄今共进行了450次点火，试车时间累积30000秒。性能接近YF77，但是节流能力极强。这也是美国近十年完成研制的唯一一种氢氧火箭发动机。

这次不会有人质疑蓝色起源有无完成BE-4研发的实力了吧……{:soso_e100:} 另外这也是亚马逊对贝宝的另一个胜利{:soso_e144:}

Blue Origin to Begin New Shepard Flight Tests Later This Year
April 7, 2015, at 10:01 am
in News
- See more at: http://www.parabolicarc.com/2015 ... thash.wKwFON8e.dpuf

Blue Origin plans to begin flight tests of its reusable suborbital New Shepard vehicle later this year from its West Texas facility, President Rob Meyerson said today.
The company also announced that it had completed acceptance testing on the BE-3 hydrogen engine that will power the suborbital capsule. The company said the engine has been fired for more than 30,000 seconds during 450 tests.
Meyerson said the BE-3 is now available on the commercial market for other uses. The company also has plans to develop an upper-stage variant called the BE-3U.
The BE-3 engine is the first new hydrogen-powered rocket motor to be developed in the United States in more than a decade. It is a reusable engine that can be throttled for powered vertical landings, Meyerson said.
New Shepard is a suborbital vehicle capable of flying three or more astronauts and scientific payloads. The booster stage takes off and lands vertically using the BE-3 engine. The New Shepard capsule lands under parachutes.
New Shepard can be flown autonomously. Meyerson said the company will fly the vehicle dozens of times before putting test pilots aboard.
Blue Origin hopes to get dozens if not hundreds flights out of each New Shepard vehicle, allowing people to experience space travel. The company is using the suborbital flights as a test bed for an orbital crewed system.
Occupants will have about four minutes of weightlessness on a suborbital flight that will last less than 15 minutes, he added. New Shepard will fly above the Karman line of 100 km (62.1 miles), which is the internationally accepted boundary of space.
Blue Origin is still several years away from selling tickets for New Shepard suborbital flights, which will fly from the company’s West Texas location.
Meyerson also said Blue Origin’s larger BE-4 engine would begin full-scale tests in 2016, with plans to compete testing the following year. United Launch Alliance (ULA) plans to use the engine in the first stage of a new booster it is developing.
Congress has ordered ULA to end its dependence on Russian-built RD-180 engines for the Atlas V launch vehicle by 2019. Meyerson said the BE-4 will be ready at least two years prior to any U.S. alternative.
The company has been conducting sub-scale BE-4 tests involving the engine’s fuel injector and power pack, Meyerson said. Those tests have been on-going for months.
For its future orbital operations, Blue Origin has been looking at potential locations in several states, including Florida, he added.
The company also has continued a commercial crew agreement with NASA on an unfunded basis. Blue Origin has three additional milestones to complete.
- See more at: http://www.parabolicarc.com/2015 ... thash.wKwFON8e.dpuf

关于蓝色起源
http://www.blueorigin.com
关于蓝色起源创始者贝佐斯……呃……这个不用介绍了，大家可能比我还了解他……

这个推力是地面推力还是真空推力？

论坛游侠发表于 2015-4-8 16:22
这个推力是地面推力还是真空推力？
BE-3是上面级发动机，更可能是真空推力

楠宫萧vn 发表于 2015-4-8 16:32
BE-3是上面级发动机，更可能是真空推力
文章里说了有上面级版本，说明现在是地面版。从照片看，喷管面积比不大，应该是地面的。

“1到50吨推力可调”，这节流比实在醉人，要是起飞级达到这个水平，回收的时候就方便多了。

miaomiaomiao 发表于 2015-4-8 17:35
“1到50吨推力可调”，这节流比实在醉人，要是起飞级达到这个水平，回收的时候就方便多了。

手抽，是9到50吨（110,000-lbf and 20,000-lbf）
看看BE-4的节流比吧，如果也能达到这个水平，垂直着陆还真不是个问题

miaomiaomiao 发表于 2015-4-8 17:35
“1到50吨推力可调”，这节流比实在醉人，要是起飞级达到这个水平，回收的时候就方便多了。

手抽，是9到50吨（110,000-lbf and 20,000-lbf）
看看BE-4的节流比吧，如果也能达到这个水平，垂直着陆还真不是个问题

楠宫萧vn 发表于 2015-4-8 17:37
手抽，是9到50吨（110,000-lbf and 20,000-lbf）
看看BE-4的节流比吧，如果也能达到这个水平，垂直着 ...

单发250吨的即使达到这个节流比依然推力，40吨，双发依然80吨，显然用来着陆那是不现实的，况且BE-4显然达不到这个水平

楠宫萧vn 发表于 2015-4-8 17:37
手抽，是9到50吨（110,000-lbf and 20,000-lbf）
看看BE-4的节流比吧，如果也能达到这个水平，垂直着 ...

单发250吨的即使达到这个节流比依然推力，40吨，双发依然80吨，显然用来着陆那是不现实的，况且BE-4显然达不到这个水平

文章里说了有上面级版本，说明现在是地面版。从照片看，喷管面积比不大，应该是地面的。
地面版是亚轨道旅游使用的吧……

分辨率：3500×5000

这节流能力到底是怎么办到的？这个能力在现在流行回收的背景下，很有点意思。再发散下思维，要是和ULA合搞的BE-4也能有这个技术，那用主发动机飞返也不是梦想了

这节流能力到底是怎么办到的？这个能力在现在流行回收的背景下，很有点意思。再发散下思维，要是和ULA合搞的BE-4也能有这个技术，那用主发动机飞返也不是梦想了

楠宫萧vn 发表于 2015-4-8 18:55
地面版是亚轨道旅游使用的吧……
亚轨道旅游才多大规模生意，这就是给复用火箭准备的。

cjdam2003A 发表于 2015-4-8 23:28
这节流能力到底是怎么办到的？这个能力在现在流行回收的背景下，很有点意思。再发散下思维，要是和ULA合搞 ...
明显还不够，按节流下限18%，双BE4合计推力90吨，落不下来。

亚轨道旅游才多大规模生意，这就是给复用火箭准备的。
起飞级是BE4，BE3最初就是上面级发动机。地面版很可能用于亚轨道飞行，毕竟它的飞船真的是飞船，安全性比那些火箭飞机要好不少……

楠宫萧vn 发表于 2015-4-9 07:47
起飞级是BE4，BE3最初就是上面级发动机。地面版很可能用于亚轨道飞行，毕竟它的飞船真的是飞船，安全性比 ...
VTVL用BE4推力太大，不能排除BE3兼用做垂降。

为什么目前只有氢氧机用抽气循环，还有一个J2S

论坛游侠发表于 2015-4-9 07:06
明显还不够，按节流下限18%，双BE4合计推力90吨，落不下来。
不排除以后能做到更大的节流范围嘛。当然这只是脑洞，BE-4是分级燃烧循环的，整个循环复杂度比抽气循环的BE-3复杂得多，恐怕有难度

cjdam2003A 发表于 2015-4-9 18:04
不排除以后能做到更大的节流范围嘛。当然这只是脑洞，BE-4是分级燃烧循环的，整个循环复杂度比抽气循环的 ...
双发并联不适合用主发降落。除非能节流到5%，1:20，这连专用深度节流登月发动机都做不到。

国内抽气循环是指抽的是燃气，这里所说的应该是抽的是气氢，叫分流膨胀或者开式膨胀循环。。日本叫expander bleed cycle

国内抽气循环是指抽的是燃气，这里所说的应该是抽的是气氢，叫分流膨胀或者开式膨胀循环。。日本叫expander ...
这个抽的也是燃气，结构接近于J2S

这个抽的也是燃气，结构接近于J2S
我看过j2s的系统图，抽的是气氢，文献里叫tap off cycle

终南山下飞发表于 2015-4-11 13:05
我看过j2s的系统图，抽的是气氢，文献里叫tap off cycle

The design is based on the combustion “tap-off” engine cycle, sometimes known as the “topping cycle” or chamber-bleed cycle, in which the combustion gases from around the walls of the main chamber are bled-off, partially cooled and used to power the engine's turbopumps.
Blue Origin says the cycle, which produces a relatively high specific impulse, is simpler than options such as pre-burning staged-combustion, and is well suited to human spaceflight because of its single combustion chamber and “graceful” shutdown mode. Despite the challenges of the cycle—including potentially complex start-up systems and high-temperature turbine-drive gases—Meyerson explains, “It is different because it only uses the one combustor, so it has a tendency to shut down rather than feed the combustion process.” Although Rocketyne developed the experimental J-2S tap-off variant of the Saturn V upper-stage J-2 engine in the 1960s, Meyerson says the BE-3 is the first engine of its type developed to fly.

tap off cycle另一个称呼就是 chamber-bleed cycle，就是抽取燃气由气氢冷却后驱动涡轮泵
J2S的循环示意图？你确定你看懂了？或者没看注释？再或者看的黑白版？

棕色是燃气，从燃烧室直接抽取，然后驱动燃料泵和氧化剂泵。
或者用上面的说法：

in which the combustion gases from around the walls of the main chamber are bled-off, partially cooled and used to power the engine's turbopumps.

ps
这图看黑白版本并且没有文字解释的话，确实容易误解为使用再生冷却管道中的氢气驱动泵系。液氢通过再生冷却壁后通入燃烧室，左侧抽取燃气很容易误解为抽取气氢。

终南山下飞发表于 2015-4-11 13:05
我看过j2s的系统图，抽的是气氢，文献里叫tap off cycle

The design is based on the combustion “tap-off” engine cycle, sometimes known as the “topping cycle” or chamber-bleed cycle, in which the combustion gases from around the walls of the main chamber are bled-off, partially cooled and used to power the engine's turbopumps.
Blue Origin says the cycle, which produces a relatively high specific impulse, is simpler than options such as pre-burning staged-combustion, and is well suited to human spaceflight because of its single combustion chamber and “graceful” shutdown mode. Despite the challenges of the cycle—including potentially complex start-up systems and high-temperature turbine-drive gases—Meyerson explains, “It is different because it only uses the one combustor, so it has a tendency to shut down rather than feed the combustion process.” Although Rocketyne developed the experimental J-2S tap-off variant of the Saturn V upper-stage J-2 engine in the 1960s, Meyerson says the BE-3 is the first engine of its type developed to fly.

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2015-4-11 14:04 上传

棕色是燃气，从燃烧室直接抽取，然后驱动燃料泵和氧化剂泵。
或者用上面的说法：

in which the combustion gases from around the walls of the main chamber are bled-off, partially cooled and used to power the engine's turbopumps.

重复了



重复了

tap off cycle另一个称呼就是 chamber-bleed cycle，就是抽取燃气由气氢混合冷却后驱动涡轮泵
J2S的 ...
我再看看，黑白版的，前些天看着文字还和几个同学讨论了一下，没说是燃气和气氢混合。。

终南山下飞发表于 2015-4-11 14:18
我再看看，黑白版的，前些天看着文字还和几个同学讨论了一下，没说是燃气和气氢混合。。
我手误了，燃气冷却是通过再生冷却壁中的气氢

终南山下飞发表于 2015-4-11 14:18
我再看看，黑白版的，前些天看着文字还和几个同学讨论了一下，没说是燃气和气氢混合。。
如果是黑白版，确实无法分辨液氢、液氧与燃气管道，即使有注释也很容易将燃气管道误解为通道壁中抽取的气氢

我手误了，燃气冷却是通过再生冷却壁中的气氢
主要是一直以为抽气循环没有实际应用的型号，看来实在是孤陋寡闻了，谢啦

终南山下飞发表于 2015-4-11 14:25
主要是一直以为抽气循环没有实际应用的型号，看来实在是孤陋寡闻了，谢啦
大家都是爱好者，相互交流呗……你好像是专业人士啊，以后有问题还要靠你们解答呢

美国几家私营航天公司都很激进嘛

纸飞机发表于 2015-4-11 14:36
美国几家私营航天公司都很激进嘛
我倒是绝得蓝色起源动力部分很可能是沾了前几年洛克达因裁员的光，无论BE4还是BE3都有浓厚的洛克达因风格……又是RS27的横置燃料泵又是J2S的抽气循环

就像AK和AR15延续了M1加兰德和M1943约翰逊步枪的战争一样，搞不好美国后航天时代动力部分依旧是洛克达因和TRW的竞争

就是可惜洛克达因·阿罗杰特了，

楠宫萧vn 发表于 2015-4-11 14:40
我倒是绝得蓝色起源动力部分很可能是沾了前几年洛克达因裁员的光，无论BE4还是BE3都有浓厚的洛克达因风格 ...
BE-4类似与NK-33，和AEROJET更有关系
另外XCOR的活塞泵也是个非常特别的设计，一般认为活塞泵是不适合涡轮动力设备的

纸飞机发表于 2015-4-11 14:44
BE-4类似与NK-33，和AEROJET更有关系
另外XCOR的活塞泵也是个非常特别的设计，一般认为活塞泵是不适合涡 ...
同时具备洛克达因和阿罗杰特产品的特征……这是阿罗杰特·洛克达因的工程师反水了？

另外XCOR的活塞泵没有涡轮吧，活塞驱动活塞，没有涡轮，也没有轴流泵离心泵……

大家都是爱好者，相互交流呗……你好像是专业人士啊，以后有问题还要靠你们解答呢
确实是，还看到了抽气的孔，tap-off ports。
be-4为啥不采用富燃预燃室，甲烷也积碳？

终南山下飞发表于 2015-4-11 16:06
确实是，还看到了抽气的孔，tap-off ports。
be-4为啥不采用富燃预燃室，甲烷也积碳？
富氧预燃室可以降低密封要求，BE4主要就是降低成本嘛，性能还真无所谓……前几个月有传言说BE4的真空比冲只比RD180高个位数……

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