初始温度和初始压力对气体爆轰参数影响的研究

利用已有的气体爆炸模型和包含初始压力、初始温度的气体爆轰参数的计算公式,从理论上研究初始压力和初始温度对气体爆轰参数的影响情况。使用VisualBasic语言编写计算程序,将计算值与文献值进行对比,具有较好的一致性。以甲烷-空气混合物为例,计算在98000Pa,280～400K及298K,0.1～0.5MPa的气体爆轰参数。计算结果表明,初始压力一定,混合物的爆轰压随初始温度的升高而减小,爆轰波速增大;初始温度一定,混合物的爆轰压随初始压力的增大而增大,爆轰波速基本不变;在初始温度和初始压力两个影响因素中,初始压力对混合物爆轰参数的影响明显大于初始温度。

Influence of Initial Temperature and Initial Pressure on Gas Detonation Parameters

Present gas explosion model and formulas which contain the parameters of initial pressure and initial temperature were employed to study the influence of initial temperature and initial pressure on gas explosion parameters.A calculation program was written with Visual Basic,and the calculation results were in good agreement with those published in literatures.Taking CH4-air mixture as an example,detonation parameters were calculated at 98 000 Pa,280-400 K and 298 K,0.1-0.5MPa.The calculation results show that,when initial pressure is fixed,the detonation pressure of mixture decreases with the increase of initial temperature,while detonation velocity keeps approximately stable;when initial temperature is fixed,the detonation pressure increases with the increase of initial pressure,and the detonation wave velocity almost keep the same;the influence of initial pressure on detonation parameters was much greater than that of initial temperature on detonation parameters.