查询词典 pulse-jet engine

The article with the intercept outside aerosphere implement to study a target, consider amount of miss the target is very small approach rate mediumly with intercept process bigger, be aimed at engine to be able to offer constant thrust only, can be started for many times and have pulse job state, and do not have change the character of thrust job status, apply slant buy scale guides brought a law to design agree with the switch threshold value that course controls engine.

本文以大气层外拦截器为探究对象，考虑到脱靶量很小和拦截过程中的接近速度比较大，针对发动机只能提供常推力，能多次启动并具有脉冲工作状态，且不具有变推力工作状态的特性，运用偏置比例导引律设计了适合于轨控发动机的开关阈值。

In order to improve the operation frequency, the self-suck resonator pulse detonation engine was founded, the ignition principle of the new engine use the method of shock focus autooscillation, so, it possess high ignition and operation frequency, many experts have taken experiment and numerical simulation. However, the physical processes in the resonator cavity are very complicate,the reliable theory haven't set up by now, require the further study.

为了提高脉冲爆震发动机的工作频率，自吸气共振型脉冲爆震发动机模型被提出，该新型发动机点火原理采用激波谐振聚焦点火方式，具有很高的点火及工作频率，许多专家对此进行了实验研究和数值模拟，但由于谐振腔内的物理过程非常复杂，到目前为止没有一套可靠的理论，有待于进一步研究。

It also indicates that the model of pulse detonation engine is right and the data acquiring system is reliable.

结果表明该实验原型可以产生脉冲爆震波，自主研制的数据采集系统满足脉冲爆震发动机测试系统的要求。

A diagonal pull tipping-bucket self-recording flow meter based on volumetric method is introduced herein; which consists of tipping-bucket flow sensor, mechanical pulse generator and counter; of which the innovation is that the engine counter used commonly in the weaving industry is successfully applied in the flow measuring through the design of a new mechanical pulse generator .

介绍了一种基于翻斗法量水的自记流量测定仪，该测定仪构成主要包括翻斗式流量传感器、机械脉冲发生器和计数器3部分，其创新点在于，通过自行设计的新型机械脉冲发生装置，将在纺织行业普遍应用的机械式累计数器成功的应用于流量的测定中，该测定仪最大的特点是无需任何动力，抗干扰能力强，特别适合野外工作

This paper establishes two PDE models on the base of analyzing radical principle of detonation wave, formation characteristics and propagation mechanism as well as performance of detonation wave, and working principle and cycle of pulse detonation engine. Then give a 2D axisymmetrical numerical simulation of internal flow field of the detonation chamber.

本文在分析爆震波的基本理论、爆震波的形成特点、传播机理及其特性和脉冲爆震发动机的工作原理的基础上，建立了两个PDE模型，并用FLUENT对其爆震室内流场进行了二维轴对称数值模拟。

Effects of partial detonable mixture filling proportion on detonation wave pressure properties of kerosene/air pneumatic-valve pulse detonation engine were investigated. A preliminary analysis of a series of wave's reciprocity was carried out.

研究了不同部分充填比例对煤油／空气气动阀式脉冲爆震发动机的爆震波压力特性影响，初步分析了部分充填的爆震管内一系列波相互作用的机理。

To improve the reliability of pressure measurement in detonation combustor of pulse detonation engine, the pressure/time curves of detonation were measured at single detonation and multicycle detonation, respectively, by using a dynamic pressure measurement system.

为了提高脉冲爆震发动机（Pulse Detonation Engine，简称PDE）内爆震波压力测量值的可靠性，解决多循环PDE爆震室压力测量问题。

Pulse detonation engine is a new concept of propulsive engine which uses high temperature and pressure gas produced by intermittent or pulsant detonation wave to generate thrust. PDE has many desirable advantages, including high thermal dynamic cycle efficiency, low specific fuel consumption, high thrust/weight and specific impulse, simple configuration, and will become propulsive device of aviation and spaceflight aerocraft in 21st century.

脉冲爆震发动机是一种利用间歇式或脉冲式爆震波产生的高温、高压燃气来产生推力的新概念发动机，这种发动机具有循环热效率高、燃料消耗率低、推重比高、比冲大、结构简单等优点，将成为21世纪新型的航空航天飞行器的动力装置。

The results indicate that there are vortexes, shocks and expansion waves outside the multi-tube PDE. In addition, the results might be referrible to research the characteristics of the flow-field outside multi-tube Pulse Detonation Engine.

计算结果表明，此多管脉冲爆轰发动机黏性外流场中存在旋涡及多道相互作用的激波与膨胀波，该结果对多管脉冲爆轰发动机外流场特性研究具有一定的参考价值。

Pulse Detonation Engine tests in the PDE tube H_2-O_2-N_2 have been performed with central ignition in the tube end.

利用内径为30mm，长度为1000mm的爆轰管，对脉冲爆轰发动机进行研究。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。