多循环吸气式脉冲爆震发动机推力直接测量

Impulse of cyclic air-breathing pulse detonation engine

关键词:  脉冲爆震发动机~+  推力  直接测量

Key words:  Pulse detonation engine~+  Thrust  Direct measurement

摘要:

为了论证直接测量方法在间歇工作的脉冲爆震发动机系统推力测量中的可行性,试验采用动态压电式力传感器,对内径为180mm,长2000mm的吸气式多循环PDE原型机的推力进行直接测量,并获得推力特征曲线。PDE工作频率分别为10Hz和20Hz时,对应的平均推力分别为605N和840N。试验发现系统在一个周期内惯性力积分为零,证明了用直接测量方法测量PDE平均推力的可靠性。

Abstract:

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.