The first contract signed was for rolls royce to supply 450 million worth of jet engines to air china 双方签署的第一份合同是关于劳斯莱斯股份有限公司为中国国际航空股份有限公司提供的价值45亿英镑的喷气发动机。
The airline industry has promised great strides in jet - engine efficiency to mitigate the environmental damage caused by flying 航空业已经在其喷气发动机的效率方面做出了很大的改进措施，旨在减少飞机在飞行过程中对环境造成的破坏。
Starting with the invention of the bicycle , going on to sports cars , cars with jet engines , rocket - powered cars , attempts to break the sound barrier , and rocket - engine airplanes 从发明自行车开始，一直到赛车，喷气发动机汽车，火箭动力汽车，尝试突破声障和火箭动力飞机。
Starting with the invention of the bicycle , going on to sports cars , cars with jet engines , rocket - powered cars , attempts to break the sound barrier , and rocket - engine airplanes 从自行车的发明开始，接着到跑车，喷气发动机车，火箭喷射器车，试图打破声障，然后是火箭引擎飞机。
With a viscosity similar to petro - diesel , it can be used in diesel engines ( cars , trucks , buses , construction equipment ) , jet engines , and heating and electricity generating systems 它的粘滞度与石油柴油类似，可以用于柴油机（汽车、卡车、巴士、施工设备） 、喷气发动机以及热电系统。
The 52 - year - old scientist at beijing institute of aeronautics and astronautics holds three chinese patents and one u . s . patent for aerospace - related advances , as well as chinas national first - class invention prize for his research on improving the efficiency of jet engines 52岁的科学家在北京航空航天研究所举办的中国专利和三项美国专利一项航空航天有关垫款,以及中国全国一流的研究,他发明奖更有效率喷气发动机
Along with the advent of the highly efficient turbofan jet engine , used today on the majority of commercial aircraft , came a new and challenging problem for maintenance personnel . the repair and replacement of the abradable liner seal , sometimes also known as the fan track . . 在大多数商用飞机使用高效率的涡轮风扇喷气发动机时代到来的同时，飞机维修人员也面临着新的挑战，即如何修理和替换发动机上的耐磨损内衬密封条，有时候也被称为风扇轨道
Since delays are often encountered in engineering systems , ecology systems , electricity systems , management systems and control systems such as the turbojet engine , microwave oscillator , nuclear reactor , controlability of systems and optimal control , etc . the phenomena of delays are investigated by more and more scientists 在工业工程、生态系统、电力系统、管理系统、控制系统等实际系统中常常遇到很多时滞问题，如涡轮喷气发动机、微波振子、核反应、系统的可控性和最优控制等问题，所以时滞现象越来越受到众多科学家的广泛关注。
This dissertation has on the research and design of a micro turbine engine as background and it is for the purpose of comprehending viscous flow behaviors in micro scaled conditions and that in the mini - turbine cascades . a mini wind tunnel is designed and set up which also can be used in other micro flow experiments . on the basis of this mini wind tunnel , three mini flow experiments , including micro jet experiment , micro boundary layer experiment and mini - turbine cascades experiment , have been carried out 本文以某型微型涡轮喷气发动机研制为背景,以认识微尺度下粘性流体流动状态及其机理和微涡轮叶栅通道内部流动特性为目的,设计并搭建了除本实验外还可供其他流体力学实验使用的微型风洞,并在该微型风洞基础上进行了微尺度射流实验、微尺度壁面边界层实验和微尺度涡轮叶栅实验。
