脉冲爆震发动机起爆点火系统方案研究

Investigation on Scheme of Ignition System of Pulse Detonation Engine

在分析爆震波的基本理论、脉冲爆震发动机(PDE)的工作原理及对现有航空发动机和汽车点火系统进行研究的基础上,根据PDE对起爆系统点火能量和火花频率可调的要求,提出了以晶闸管为开关控制元件和电容储能的半导体高能点火系统方案.设计的倍压整流、半波整流和直流供电的脉冲爆震发动机起爆点火系统实现了点火能量和火花放电频率的控制.电路模拟仿真表明,设计的起爆点火系统可满足脉冲爆震发动机的要求.

Based on detailed analysis of the basic theory of detonation wave and operating principle of pulse detonation engine (PDE) as well as the existing ignition system of aero-engines and motors, a design approach for semiconductor high energy ignition system is put forward according to the PDE' requirements of initiating detonation system for adjustable ignition energy and changeable spark frequency. The design method adopts thyristor as switching control elements and capacitors as elements of storing energy. The initiating detonation systems of voltage multiplying rectification, half-wave rectification and direct-current supply are designed to implement the control ignition system of PDE over ignition energy and spark frequency. The results of circuit simulation manifest that the designed systems can meet the PDE's requirements to initiating system.