超级军网法国斯奈克马出钱委托CIAM 研究这个类型的发动机研究用 ...
来源：百度文库 编辑：超级军网 时间：2024/05/01 06:20:03
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这个叶片很奇怪，j总科普下
回复 2# 雨后无彩虹
正在等学霸出来科普呢
正在等学霸出来科普呢
毛子的NK93看来是杯具喽{:jian:}还在76上试验过
毛子的NK93看来是杯具喽{:jian:}还在76上试验过
因为A400M的发动机需要加强
桨扇发动机？涡扇的推力，涡桨的油耗
川肥肠 发表于 2011-3-13 19:29 
桨扇外边没有罩罩的
桨扇外边没有罩罩的
浆扇是涡浆今后的进化方向之一。
等学霸出来科普
带罩的浆扇，起码能降低噪音。万一扇叶脱落，还能抱住。
弱弱地问一句：这个发动机怕鸟吗？
J兄，
你在钓鱼，还是抛玉引砖？若是后者，我就给你一块肉！
SNECMA COUNTER ROTATING FAN AERODYNAMIC
DESIGN LOGIC & TESTS RESULTS
Jérôme Talbotec, Michel Vernet
Snecma
In order to meet ACARE 2020 objectives by reducing both the perceived noise and the fuel burn (and therefore NOx and CO2 emissions), Snecma – within the framework of the VITAL program- has studied the CRTF concept in which the fan pressure ratio is obtained from two fans which rotate in opposite directions.The energy to be produced is distributed between the two fans, thus reducing the fan tip speeds which results in lowering the fan noise emission. Basically, VITAL CRTF targets a 6 EPNdB noise reduction per certification point (leading to a 15 to 18 EPNdB cumulated noise
reduction) and an increase in fan efficiency of 2% compared with a year 2000 reference
engine. Snecma led the VITAL program, and in particular the WP2.4 dedicated to CRTF. Snecma coordinated the design, manufacture, instrumentation, testing and analysis involving various partners, including CIAM, DLR, Cenaero, Comoti, NLR, Onera and UPMC [1].
你在钓鱼，还是抛玉引砖？若是后者，我就给你一块肉！
SNECMA COUNTER ROTATING FAN AERODYNAMIC
DESIGN LOGIC & TESTS RESULTS
Jérôme Talbotec, Michel Vernet
Snecma
In order to meet ACARE 2020 objectives by reducing both the perceived noise and the fuel burn (and therefore NOx and CO2 emissions), Snecma – within the framework of the VITAL program- has studied the CRTF concept in which the fan pressure ratio is obtained from two fans which rotate in opposite directions.The energy to be produced is distributed between the two fans, thus reducing the fan tip speeds which results in lowering the fan noise emission. Basically, VITAL CRTF targets a 6 EPNdB noise reduction per certification point (leading to a 15 to 18 EPNdB cumulated noise
reduction) and an increase in fan efficiency of 2% compared with a year 2000 reference
engine. Snecma led the VITAL program, and in particular the WP2.4 dedicated to CRTF. Snecma coordinated the design, manufacture, instrumentation, testing and analysis involving various partners, including CIAM, DLR, Cenaero, Comoti, NLR, Onera and UPMC [1].
板岗丁 发表于 2011-3-17 08:30
抛砖引玉啊， 把你引出来鸟。
详细提供和介绍一下？:handshake
抛砖引玉啊， 把你引出来鸟。
详细提供和介绍一下？:handshake
回复 13# JSTCVW09CD
翻译太麻烦，你自己看呗，我那标题有链接的。
The challenges of the CRTF concept can be summed up as follows:
reduce the noise level (by decreasing fan rotation speed), 降低噪音 （反向的两级叶片转到慢）
be competitive in terms of weight and cost (by limiting fan blade count and diameter increase), 重量和成本有竞争力，（两级的风扇不用太大的叶片）
and improve specific consumption (by improving fan efficiency).
回复 13# JSTCVW09CD
翻译太麻烦，你自己看呗，我那标题有链接的。
The challenges of the CRTF concept can be summed up as follows:
reduce the noise level (by decreasing fan rotation speed), 降低噪音 （反向的两级叶片转到慢）
be competitive in terms of weight and cost (by limiting fan blade count and diameter increase), 重量和成本有竞争力，（两级的风扇不用太大的叶片）
and improve specific consumption (by improving fan efficiency).
（VITAL）是由欧盟倡议并投入过半资金。目的是降噪音和减排。同时也能增强欧洲的实力。
从前对斯奈克马的水准不看好，估计是M-53发动机给我的印象不好的过，不过看了SSJ100的SAM146绝的还八错，难道SSJ要一直用？
涡轮 发表于 2011-3-18 00:11
不会，只有这一个基本型号的SSJ用，改型的用PD-14的核心机
不会，只有这一个基本型号的SSJ用，改型的用PD-14的核心机