气-液两相临界流速及压力扰动传播规律  

Critical Flow Velocity and Propagation Characteristics of Pressure Disturbance in Gas-Liquid Two-Phase Flow

作　　者：陈二锋[1] 厉彦忠[1,2] 应媛媛[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《核动力工程》2010年第5期57-62,共6页Nuclear Power Engineering

基　　金：教育部高等学校博士学科点专项科研基金(20060698021)

摘　　要：应用整体平均两流体模型建立了带相变的气-液两相流压力波传播模型。根据小扰动原理和一阶线性齐次方程组有解的条件导出了两相压力波的色散方程。通过理论及实验数据分析了两相临界流速和压力脉冲及压力波传播速度间的关系,并研究了泡状流和弹状流流型下气-液两相压力波的传播规律。研究结果表明:气-液两相压力波具有色散特性,当扰动频率趋于∞时压力波传播速度等同于压力脉冲传播速度;两相临界流速与压力脉冲扰动传播速度相等价。According to the small perturbation theory and solvable conditions of one-order linear equations,the dispersion equation of two-phase pressure wave propagation with phase change was derived via the ensemble average two-fluid model.The relationship between critical flow velocity and propagation speed of pressure wave and pressure pulse was analyzed,and the propagation characteristics of pressure wave in the bubbly and slug flow were studied.The results indicate that the pressure wave in gas-liquid two-phase flow has the dispersion property,and the propagation speed of pressure wave with indefinite angular frequency is the propagation speed of the pressure pulse.Moreover,the two-phase critical flow velocity is equal to the propagation speed of the pressure pulse.

关 键 词：压力波 压力脉冲 色散方程 临界流速 传播速度 气-液两相流 

分 类 号：TK123[动力工程及工程热物理—工程热物理]