多循环吸气式脉冲爆震发动机推力直接测量

1引言脉冲爆震发动机(Pulse Detonation Engine,简称PDE)是利用间歇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。其燃烧过程为非定常过程。整个过程是间歇式的、周期性的,因而产生的推力是脉动的,PDE产生推力的方式和工作特点决定了其测量推力的方法与一般的涡喷发动

Impulse of cyclic air-breathing pulse detonation engine

In order to demonstrate the feasibility of thrust direct measurement, a dynamic pressure transducer was used to measure impulse of air-breathing pulse detonation engine directly. The typical impulse time history was obtained by experiment on a PDE prototype with the diameter and the length 1800mm and 2000mm, respectively. When the prototype steadily and periodically is operated at the frequency of 10Hz and 20Hz, the average impulse come up to 605N and 840N, respectively. As the integration of the inertia amount to zero in a cycle, the results of direct measurement of PDE average impulse are reliable.