CAJ | 학술논문

基于质量、动量和能量守恒方程,建立泡沫流体在圆管内流动与换热的物理模型和数学模型,并利用FLUENT软件进行模拟,得到不同雷诺数下圆管内的压力损失、管道横截面上的速度分布和表观黏度分布,同时回归了不同雷诺数下的摩阻系数和努塞尔数经验关系式.结果表明:管内压力沿管程不断降低,且流速越大压降越大;管内温度沿管程不断升高,且流速越小温升越大;管道横截面上的速度、温度分布不均匀,越接近管壁速度越小,温度越高.
기우질량、동량화능량수항방정,건립포말류체재원관내류동여환열적물리모형화수학모형,병이용FLUENT연건진행모의,득도불동뢰낙수하원관내적압력손실、관도횡절면상적속도분포화표관점도분포,동시회귀료불동뢰낙수하적마조계수화노새이수경험관계식.결과표명:관내압력연관정불단강저,차류속월대압강월대;관내온도연관정불단승고,차류속월소온승월대;관도횡절면상적속도、온도분포불균균,월접근관벽속도월소,온도월고.
The flow and heat transfer physical and mathematical models of foam fluid in pipes were established on the basis of mass, momentum and energy conservation equation.And the flow and heat exchange rules were simulated using FLUENT software. The pressure losses, velocity distribution and apparent viscosity distribution in section of different Reynolds number were given. And an empirical regression correlation between Nusselt number and friction coefficient in different Reynolds number was given. The results show that the pressure in pipe decreases along pipe, and the pressure drop increases with foam flow velocity rising. The temperature increases along pipe, and the differential temperature increases with foam flow velocity decreasing. The velocity and temperature distributions are nonuniform on cross section. The velocity is small and the temperature is high close to the pipe wall.