组件组合方式对两相PDE总压损失和峰值压力影响

Effect of test-parts assembly modes on total pressure loss and peak pressure in two-phase pulse detonation engine

关键词:  脉冲爆震发动机  有效总压损失  无效总压损失  峰值压力

Key words:  Pulse Detonation Engine  Effective total pressure loss  Ineffective total pressure loss  Peak pressure

摘要:

为了提高脉冲爆震发动机(PDE)的综合性能,在冷态条件下研究了螺旋钝体组件和扰流片钝体组件的总压损失,同时研究了它们在不同工作频率下的爆震波压力,将两者结合起来进行比较,确定相应组件的损失是有效总压损失还是无效总压损失。研究表明:激波反射器能反射、会聚强激波,增加爆震波峰值压力,因此它的总压损失大部分为有效损失;对于两相混气,平面火焰发生器和中心锥的总压损失基本为无效损失;总体上讲,螺旋钝体组件优于扰流片钝体组件。

Abstract:

In order to improve the comprehensive performance of Pulse Detonation Engine(PDE),the total pressure loss of spiral obstacle assembly and circular annular obstacle assembly was investigated under the environmental condition,while the pressure of detonation wave of two assemblies was also studied at various operation frequency.The results of the total pressure loss and detonation wave pressure were compared to determine whether their total pressure loss was effective or not.It is showed that the cone reflector assembly can reflect and focus strong shock waves and improve peak pressure of detonation wave,so its total pressure loss is mainly effective.The generator of quasi-plane waves (GQPW) and central cone total pressure loss is basically ineffective for two-phase mixture.As a whole,the performance of spiral obstacle assembly is better than that of circular annular obstacle assembly.