Development of the Propulsion System Using Detonations

目前的研究项目是爆轰推进系统，它有望成为一种高性能的化学推进动力装置。本文主要研究脉冲爆震发动机(PDE)的基本原理，目前认为脉冲爆震发动机是一种比冲压加速器或斜爆轰发动机等更符合实际的爆震推进系统。PDE系统由进气、点火器、爆轰管和喷管系统组成，喷管系统根据情况包括涡轮。实验主要由三个装置进行：第一个装置是PDE的长期运行和热测量系统的标定。第二个是工作在100赫兹以上的高频多管脉冲爆震装置，获得了爆轰管与喉部喷管干涉的数据。第三种是爆轰管，它是用来引爆的。研究了几种起爆药剂，并对不同混合气体的爆轰性能进行了探讨。采用理论分析和数值模拟相结合的方法对偏微分方程的性能进行了分析研究。作为谐振器的爆轰特性也得到了数值研究。在本项目期间，除了吸气式发动机的进气外，我们已经走到了PDE技术开发的入口处。

Present research project is on the detonation propulsion system, which has been expected as a high performance chemical propulsive power unit. The main purpose of this study the fundamental elements of the pulse detonation engine (PDE), which is, for the moment, considered as a more realistic detonation propulsion systems than others ideas, such as the ram accelerator or the oblique detonation engine. The PDE system consists of the inlet, the igniter, detonation tube, and the nozzle system including turbine depending on the case. The experiments are carried by mainly three apparatus: The first one is for the long-term operations of PDE and the calibration of the thermal measurement system. The second one is a multi-tube PDE operating high frequency such as over 100 Hz, getting data on the interference between the detonation tubes and throat nozzle. The third one is a detonation tube, which is aimed at the initiation of detonation. Several kind of detonation initiator is investigated, as well as the detonation properties for various gas mixtures are inquired. Analytical investigations on the performance of PDE is made by theoretical analysis as well as numerical simulations. Special feature of detonation is also investigated numerically as resonator. In the period of this project, we have arrived at the entrance of the technical development of PDE, except for the air intake of the air-breathing engine.