繁体中文  
 
版主:黑木崖
 · 九阳全新免清洗型豆浆机 全美最低
 
A look at technologies for commercial aircraft
送交者:  2017年09月23日00:37:31 于 [世界军事论坛] 发送悄悄话

What does the future bring? A look at technologies for commercial aircraft in the years 2035–2050

Open Access funded by National Laboratory for Aeronautics and Astronautics
Under a Creative Commons license

Abstract

Demographics and economics in the next 20 years are being examined. They reflect a significant GDP growth and with this a strong demand for commercial aircraft not only in the US and Europe but across Asia and the Middle East. The demand will focus on more fuel efficient and more environmentally friendly vehicles.

Significant progress is being made with the new regionals, narrow-body, and wide-body aircraft between now and the year 2020. Looking beyond, the world will examine new airplane architectures, new changes in propulsion systems, and higher thermal and propulsion efficiencies. Distributed propulsion options will come into play. With them, higher operating pressure gas generators will be developed and great attention will have to be given to highly integrated propulsion/airplane systems. Energy transfer requirements will lead to bigger gear systems as well as new hybrid systems. The new machines are forecasted to offer improvements in fuel efficiencies of over 40%.

There are many technical challenges to make all these things happen. The aerospace engineers and scientists of today and tomorrow face unlimited opportunities to make a difference for what looks like a very exciting future.

Keywords

Fuel efficiency
High bypass ratio
Distributed systems
Turbines
Propulsion
Engines
Airplane

full article:

https://ac.els-cdn.com/S2212540X14000728/1-s2.0-S2212540X14000728-main.pdf?_tid=695b2e54-9fd5-11e7-9ffe-00000aab0f27&acdnat=1506112640_6bebaf4f0297a6d2724fefb09d9a7ef2

0%(0)
0%(0)
标 题 (必选项):
内 容 (选填项):
实用资讯
北美最大最全的折扣机票网站
美国名厂保健品一级代理,花旗参,维他命,鱼油,卵磷脂,30天退货保证.买百免邮.
一周点击热帖 更多>>
一周回复热帖
历史上的今天:回复热帖
2016: 金庸:为什么历史上没有一个国家能成功
2016: 台当局冻结中程导弹白花十几亿元:或迫
2015: 中美关系的难与不难
2015: 郑永年:中美关系的难中之难 zt
2014: 俄罗斯之声: 印度能否超过中国? zt
2014: 女通信兵背30多斤重装备演习(图)
2013: 据说这是新的路线图,马就出来了
2013: 更多宣判内情:薄熙来当庭咆哮 被强行带
2012: 好久没点名了,这几天恶毒骂温的几个马
2012: 我估计这次联合国野田演讲,中方回应会