摘要
将煤与瓦斯突出过程的瓦斯突出视为连续射流,应用伯努利方程,建立了瓦斯射流的数学模型,得到了瓦斯突出射流流速和流量表达式,在此基础上考虑突出口压力和突出口直径影响,进行了瓦斯射流的数值模拟,得到了突出压力与突出射流最大速度、突出压力与射流流场分布、突出口直径与突出影响范围间关系规律。模拟结果表明:突出口压力与突出射流最大速度近似呈线性关系,在一定条件下射流流场分布具有甩尾效应,突出口直径越大,其突出影响范围越大。
Gas outburst in the process of coal and gas outburst is regarded as solid jet.Based on Bernoulli equation,mathematical model of gas jet was established.Some relationship rules are presented including relationship between gas outburst pressure and maximum velocity of outburst jet,relationship between gas outburst pressure and flow field distribution of gas jet,and relationship between diameter of outburst hole and influence circle of gas jet.The results show that relationship between gas outburst pressure and maximum velocity of outburst jet is approximately linear.Under some conditions,flow field distribution has whipping effect.The larger diameter of outburst hole is,the larger influence circle of gas jet is.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2007年第S2期98-100,共3页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金青年基金资助项目(10502023)
国家自然科学基金重大资助项目(50490275)
