气体非稳定爆轰波在具有声学吸收壁的直角三通弯管中传播特性研究

An Experimental Study for the Unsteady Gaseous Detonation Propagating in Right-angle Tee Joint Bend with Acoustic Absorbing Layer

本文实验研究了丙烷、氧气和空气的预混气体非稳定爆轰波在具有声学吸收壁的直角三通弯管中传播特性,分析了声学吸收材料厚度对非稳定爆轰波传播特性的影响.实验结果表明,在直角三通弯管中安装声学吸收材料对气体非稳定爆轰波有明显的衰减作用,在弯管前后非稳定爆轰波的传播速度和压力都有很大程度的减小.而且随着声学吸收材料厚度的增加,气体非稳定爆轰波强度衰减幅度增大.这一实验结论对工业安全具有重要的参考价值.

In this paper propagation characteristics of unsteady gaseous detonation in rightangle tee joint bend with acoustic absorbing layers were studied experimentally. Experiments were performed in stoichiometric propaneoxygenair mixtures. The influence of thickness of acoustic absorbing layer on propagation characteristics of unsteady gaseous detonation in 90° bend was also analyzed. Experimental results showed that acoustic absorbing layer has a pronounced effect on attenuation of detonation waves. Detonation velocity and pressure before and after rightangle tee joint bend with acoustic absorbing material are significantly reduced. It was also found that the detonation strengths decrease with increase in the thickness of acoustic absorbing layer. These conclusions are of great value for industrial safety.