基于激光诊断技术的脉冲爆震发动机多参数自动测试系统

脉冲爆震发动机(以下简称PDE)的燃烧产物具有高温、高压、高污染、极快的脉动速度等特点,为了实时检测PDE工作过程中各参数的变化,改进PDE的设计性能.应用激光诊断技术,虚拟仪器技术,研制了PDE多参数自动测试系统(以下简称系统).叙述了该系统的工作原理、系统硬件结构和软件的设计方法.运用LabWindows/CVI与MATLAB混合编程提高了系统的开发效率,使系统功能更加灵活、强大.用该系统对一PDE实验样机作了实时检测,得到了PDE工作过程中的燃烧产物的温度及组分浓度.结果表明:该系统的时间分辩率小于1 ns,获取的CO2、CO、及HC的值反映了PDE的燃烧效率.这是传统的测量方法无法实现的.

A Multiple-Parameter Automatic Measurement System for the Pulse Detonation Engine Based on the Laser-diagnose Technology

As is well known, the combustion products of the pulse detonation engine (PDE) have the characteristics of high temperature, high pressure, high pollution, and fast pulsing velocity. To monitor the changes of various parameters during the working process of a PDE in a real time and to improve the performance of the PDE, a multiple-parameter automatic measurement system for the pulse detonation engine has been developed based on the laser-diagnose technology and the virtual instrument technology. The working principle and design method for the hardware structure and software of the system are presented. To improve the efficiency of system development, the mixed programming method between LabWindows/CVI and MATLAB is adopted. The system is tested for measuring in real time the temperature and constituent density of the combustion products of a prototype PDE. Results show that the time resolution of the system is less than 1 ns. It is also shown that the measured CO2, CO, and HC data can reflect the combustion efficiency, which cannot be realized by tradition measurement methods.