内设半球条栅形障碍物的可燃气云爆炸实验研究  

An experimental research on the premixed flammable gas cloud explosioninduced by semi-spherical shaped grate obstructions

作　　者：毕明树[1] 李生娟[2] 丁信伟[1] 

机构地区：[1]大连理工大学化工学院,辽宁大连116012 [2]上海理工大学动力学院化工过程机械研究所,上海200093

出　　处：《爆炸与冲击》2004年第3期281-284,共4页Explosion and Shock Waves

基　　金：国家自然科学基金项目(5007006)

摘　　要：以混合比为13.3%的乙炔 空气混合物为介质进行了内设半球条栅形障碍物的可燃气云爆燃实验研究。通过对实验数据进行曲线回归,并经方差分析检验,得到了描述可燃气云爆燃压力场的拟合关系式。应用多能模型构想对半球形可燃气云内设半球条栅形障碍物的爆燃实验结果进行分析,得到综合考虑边界条件、混合物活性和尺度比例因子的爆燃超压关系式,为其它可燃气云在其它形式障碍物约束下的爆燃超压提出估算方法。An experimental system consisting of pressure transducers, data acquisition card, computer and electric spark ignition device was set up to study the premixed flammable gas cloud explosion in a space with semi-spherical shaped grate obstructions. The tested gas mixture was acetylene/air of a fuel concentration 13.3%. The radii of gas cloud in experiments ranged from 0.25m to 1.25m, and the radii of obstructions 0.1m and 0.3m, in which the bar grating width varied from 15mm to 60mm, and the interspaced ratio was from 20% to 75%. Based on a multi-energy model as well as the experimental data regression and deviation analysis, a fitting formula has been obtained to relate the cloud deflagration pressure to the cloud radius, the distance from ignition point, the obstruction characteristics and the laminar burning speed of mixture. The results of deviation analysis shows that the fitting formula is effective on a higher confidence level.

关 键 词：爆炸力学 爆燃 障碍物 超压 可燃气云 

分 类 号：O381[理学—流体力学]