矩形管两相脉冲爆轰探索性实验研究

Exploratory Experimental Investigation on Two-phase Pulse Detonation in A Rectangular Tube

设计了截面尺寸为68mm×51mm、长为2 300mm的矩形两相脉冲爆轰实验器,以液态汽油为燃料、空气为氧化剂,采用50mJ低点火能量系统及单步起爆方法进行了两相脉冲爆轰原理性实验,所测量的爆轰波压力接近充分发展的爆轰波。实验中在爆轰管内部安装矩形环状扰流片来促进爆轰波的形成,该实验器最高爆轰频率达到15Hz。研究结果表明:随着爆轰频率的增加,平均爆轰波峰值压力逐渐减小;环状扰流片对于爆轰波的形成以及自持传播具有重要的促进作用。研究工作为两相脉冲爆轰实验器的工程应用提供了技术储备。

A rectangular two-phase pulse detonation tube has been designed with sectional dimensions of 68mmx51mm and length of 2 300mm. A proof-of-principle experiment of two-phase pulse detonation was carded out, by using liquid gasoline as fuel and compressed air as oxidizer with low-energy system （total stored energy of 50m J） and new one-step initiation method. The measured detonation wave pressure was very close to that of fully developed detonation. Some rectangular orifices, which were designed to promote the generation of detonation wave, were set up inside the detonation tube, and the detonation tube could be operated at detonation frequency up to 15Hz experimentally. The experimental results indicated that the average peak pressure of detonation waves decreased gradually as detonation frequency increased, and it＇s the designed orifices that promoted the generation and sustained propagation of detonation waves. The results in the investigation will supply technology preparation to bringing two-phase pulse detonation tube to production.