爆轰不稳定性及初始压力对螺旋爆轰轨迹角的影响  

Effect of Detonation Instability and Initial Pressure on Track Angle of Spinning Detonation

作　　者：赵焕娟[1,2] 刘克庆 庞磊 刘婧 林敏 董士铭 ZHAO Huanjuan;LIU Keqing;PANG Lei;LIU Jing;LIN Min;DONG Shiming(College of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Henan Polytechnic University,Jiaozuo 454000,Henan,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]河南理工大学河南省瓦斯地质与瓦斯治理重点实验室,河南焦作454000

出　　处：《兵工学报》2023年第4期1086-1096,共11页Acta Armamentarii

基　　金：国家重点研发计划重点专项基金项目(2018YFC0810606-02);中央高校基本科研业务专项项目(FRF-MP-20-20、FRF-TP-19-020A3);河南省瓦斯地质与瓦斯治理重点实验室开放基金项目(WS2020A03)。

摘　　要：为研究爆轰不稳定性及初始压力对螺旋爆轰轨迹角的影响,开展了预混气螺旋爆轰实验研究。利用内径63.5 mm、长4 m的爆轰管道系统对4组预混气(气体Ⅰ:2H_(2)+O_(2)+50%Ar,气体Ⅱ:C_(2)H_(2)+2.5O_(2)+85%Ar,气体Ⅲ:C_(2)H_(2)+5N_(2)O,气体Ⅳ:CH_(4)+2O_(2))进行爆轰实验;采用烟膜技术记录螺旋爆轰波的胞格结构,测量不同预混气在不同压力下右旋、左旋横波与管轴形成的轨迹角α^(+)、α^(-),分析轨迹角的变化、初始压力以及爆轰不稳定性对其影响。实验结果表明:4种预混气的螺旋爆轰轨迹角均位于30°~50°范围内;爆轰不稳定性相对较弱的气体(气体Ⅰ,气体Ⅱ,气体Ⅲ),轨迹角测量值与声学理论计算得到的理论值吻合度较好,不稳定性强的气体(气体Ⅳ),测量值与理论值吻合度较差;4种预混气的轨迹角离散度大小及变化趋势与壁面胞格离散度一致;随着初始压力增大,4种预混气的轨迹角均明显减小,减小幅度相近,且在高频螺旋阶段,初始压力比爆轰不稳定性对轨迹角的影响作用更强。Experiments were conducted in the detonation tube with an inner diameter of 63.5 mm to study the effect of initial pressure and detonation instability on track angle.In the detonation experiments,four typical premixed mixtures(which could be divided into stable mixtures such asⅠ:2H_(2)+O_(2)+50%Ar,Ⅱ:C_(2)H_(2)+2.5O_(2)+85%Ar andⅢ:C_(2)H_(2)+5N_(2)O,and unstable mixtures such asⅣ:CH_(4)+2O_(2))were used.During the experiments,the cellular structure of the spinning detonation wave was recorded on the smoked foils.And then,the track anglesα+/α-between the right-handed/left-handed transverse waves and the tube axis were measured under different pressures.At the meantime,the variation of track angle and the influence of initial pressure and gas instability on track angle were analyzed.The results were obtained as follows.The track angles of the four premixed mixtures were in the range of 30°~50°.For the gases(Ⅰ,Ⅱ,Ⅲ)with relatively weak detonation instability,the measured values of track angle were in good agreement with theoretical values.However,for the gas with high instability(Ⅳ),the agreement was poor.The magnitude and variation trend of the dispersion of track angle was consistent with those of the cellular structure dispersion.In addition,the higher the initial pressure,the smaller the track angle.As the initial pressure increases,the track angles of the four premixed gases were all significantly decreased,and the decrease was basically consistent.Finally,in the high-frequency spinning phase,the effect of initial pressure on track angle was stronger than that of detonation instability.

关 键 词：螺旋爆轰 轨迹角 初始压力 不稳定性 三波点轨迹 横波 

分 类 号：TD774[矿业工程—矿井通风与安全] O381[理学—流体力学]