航空发动机

It is important to study the mechanism between the cascade blade profile parameters and the thrust reverser effectiveness.

航空发动机叶栅反推器叶型参数与反推效率、流量系数之间的规律对于反推装置的设计具有重要意义。

A test model of four co-rotating disks was developed as the simplified version of a typical internal cooling system of a gas turbine compressor. The investigation was on the distribution of local heat transfer coefficient and the averaged nusselt number of the downstream main disk. Experimental analysis may lead to following conclusions: the distribution is not of monotony and multi-peaks were found along the disk surface,Nu increases with the decrease of the rotational reynold number Re(subscript w,Nu increases with the axial reynold number and the grasholf number.

针对航空发动机多级压气机盘腔的冷却问题，对具有轴向通流的三腔模型进行了系统的研究，通过对局部换热特性与平均换热特性的分析，可以表征旋转盘的热应力水平和相对冷却效果，结果表明表征旋转盘热应力水平的局部换热特性在旋转盘的半径上呈多峰分布，表征相对冷却效果的平均换热特性与旋转雷诺数Re、进气雷诺数Re以及格拉晓夫数Gr有关，当Re及Gr增加时，平均努塞尔数Nu随之增加，而Re的增加使之减小。

To research the parts with new structures, new design methods are needed to realize the design of manufacture roughcast .

该技术的应用促进了航空发动机零件的结构创新，新结构零件的研制需要采用新的设计方法实现其制造毛坯的设计。

According to the characteristics of the aero-engine blade roughcast,a retrieve strategy for roughcast model was proposed based on the similarity theory and AHP method.

根据航空发动机叶片锻件的特点，提出了基于相似理论和层次分析(analytic hierarchyprocess，AHP)法的锻件模型实例检索策略。

Because the temperature of the aero-engine combustion room is very high, the measuring method is very difficult. The high temperature strain gauge and its improving methods have been discussed.

针对航空发动机燃烧室的出口温度较高，应变测量极为困难的特点，首先对高温应变计及应变计的改进方法进行了研究。

In the development of FADEC (Fully Authority Digital Engine Control) system, it is found that simulation may constitute an alternative tool useful but not complete or substitutive of experimental tests.

而系统仿真技术已成为航空发动机全权限数字控制系统研制的一个不可缺少的基本手段，尽管它无法取代真实的物理试验。

Based on the fuzzy control theory, three types of aero engine fuzzy controllers were designed.

设计了三种航空发动机模糊控制系统，并进行了仿真研究。

D start-up acceleration model for some kind of missile-used turbojet engine as well as its resolving method is established, and aero-thermodynamic simulation code based on zero-dimensional model is completed.

针对零维模型，为某航空发动机建立了动态的启动加速模型，并给出求解方法，完成了启动加速过程的气动热力计算程序。

This system has been used successfully in the xian aero engine group and praised by the users.

该系统实现后已在西安航空发动机公司投入试运行，得到了用户的肯定。

The bladed disk is an important component in the high performance aeronauticalengines.

叶片—轮盘系统是高性能航空发动机的关键部件。

I'm strongly against the death penalty — it's an eye for an eye.

我不赞成死刑——这是以牙还牙的报复行为。

And to get you the support you need, we're enlisting all elements of our national power: our diplomacy and development, our economic might and our moral suasion, so that you and the rest of our military do not bear the burden of our security alone.

并给你们所须的支援，我们正徵召国家所有各种的力量：我们的外交及发展，我们的经济力量与道德劝说，所以你们与其他军人不须要孤独地负起国家安全的责任。