初始条件影响气体非稳定爆轰波在弯管中传播特性的实验研究

对丙烷 氧气 空气的预混气体非稳定爆轰波通过圆形截面弯管时传播特性包括弯管角度以及预混气体的初始浓度和初始压力的影响因素进行了初步的实验研究 .结果表明 ,初始条件对可燃气体非稳定爆轰波经过弯管时爆轰参数有很大影响 .随着弯管角度的增加 ,弯管后非稳定爆轰波强度先增加后减小 ,弯管前非稳定爆轰波强度变化很小 ;随着预混气体的初始浓度和初始压力的增加 ,弯管前后非稳定爆轰波强度增加 .这一实验研究结果对安全使用管道阻火器具有重要的实际意义

Experimental Study on Effects of Initial Conditions for Propagation Characteristics of Unsteady Gaseous Detonation in Channels With a Bend

In this paper effects of initial conditions for propagation characteristics of unsteady gaseous detonation waves in propane oxygen air mixtures in channels with round bend were studied experimentally. Initial conditions included initial concentration, initial pressure of gas mixture and bend angles. The experimental results indicated that initial conditions play a great role in propagation characteristics of detonation waves through the bend. Detonation strength after the bend increases at first and then reduces as the bend angle increases, but that before the bend changes little. Detonation strength either before or after the bend increases as the initial concentration and the initial pressure of gas mixture increase. These conclusions are of great value for the safe use of flame arresters in industry.