爆震波

Besides the previous research finding, the ideal gas equation and ideal gas, fluid dynamics and thermal dynamics were also included in the derivation of the equation of state of the detonation Wave.

目前国内可量测爆震波速度的仪器并不普遍，因此爆震波速度值得之不易，想利用爆震波速度来探讨爆破震动的特性更是难上加难，本文将依据理想气体方程式、流体动力学、热力学、理想气体多变定律和相关的经验公式，结合冲击波和爆震波传递时质量、能量和动量守恒的理论，推导爆震波的状态方程式，并藉由爆震波的状态方程式了解爆震波的特性及其应用。

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。

Experimental results show that with given double swirl and direct pneumatic-valve and detonation tube structure, the decrease of partial detonable mixture filling proportion causes a little decrease of the peak value of detonation waves' pressure ,but impulse per unit volume of detonable mixture increases linearly.

研究结果表明，在气动阀选定、爆震管长度和爆震管内部结构一定条件下，随着脉冲爆震发动机可爆混气充填爆震管比例的降低，虽然爆震波压力峰值略有下降，但是，单位体积可爆混气获得的冲量线性增加，提高了脉冲爆震发动机的工作性能。

WT5BZThe comparative experimental study on the single detonation wave of an ethyne air mixture under various conditions was made.

选取爆震室的三种不同工作状态，采用乙炔与空气混合气对单次爆震波进行了对比实验研究，研究了爆震室的封闭程度对爆震波产生的影响规律，发现在爆震室完全封闭状态下，能产生充分发展的爆震波；爆震室一端封闭、另一端敞口状态下爆震强度明显下

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。

The results indicate that:① Soot records is one of direct and effective means;② Overdriven detonation appears only once and several blasts appear in DDT (Deflagration to detonation transition);③ The dimension of acetylene is less than that of hydrogen under the same initial condition.

试验结果表明：①烟迹法是研究DDT更为直接和有效的手段之一；②在本试验条件下，观察到DDT过程中过爆只会出现一次，但从过爆衰减至正常C-J爆震波的过程中存在多次多点爆炸的迹象；③初始条件相同的情况下，乙炔的胞格尺寸小于氢气的胞格尺寸。

Further, the hot spot is amplified to form the overdriven detonation wave, then, the overdriven detonation wave gradually becomes the steady detonation wave.

形成的热点迅速放大成为过驱爆震波，并逐渐衰减为稳定爆震波。

Regarding to model 1, firstly analyzes and studies principle as well as formation of detonation wave, the internal flow field structure of the detonation chamber. Then study the flow field structure near the outdoor of the detonation chamber, backflow process of the dilatation wave after detonation wave reach the outdoor and the change of thrust wall pressure and so on.

对于模型1，首先分析研究爆震波在爆震室内形成传播机理和爆震室的内流场结构，然后研究爆震波传出爆震管以后爆震管出口处的流场结构，膨胀波的回传过程以及推力壁压力随时间的变化等。

Then using gasoline as fuel, compressed air as oxidizers, the experiments were conducted successfully. The results show that the measured detonation wave pressure and velocity are close to theoretical values.

采用汽油为燃料，压缩空气为氧化剂，进行脉冲爆震发动机原理性试验，所测得爆震波压力接近充分发展的理想爆震波压力，测得的速度与理论值接近。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。