【摘要】 建立了含颗粒的幂律流体两相流动控制方程,首次对泵离心叶轮内含颗粒的幂律流体两相流动进行了计算研究,计算结果表明:从进口到出口,幂律流体的速度减小,压力随半径增大逐渐升高,且压力面上的压力大于吸力面上的压力;吸力面上的颗粒拟温度小于压力面上的颗粒拟温度,且靠近壁面处的大于叶道中的;最后比较了液固两相流与含颗粒的幂律流体的两相流的流动,流体相的紊动能有一定的差别,而且颗粒拟温度也有较大差别。更多还原

【Abstract】 In the full paper,we describe in detail our research on dense two-phase turbulent flow of power law fluid with particles;here we give only a briefing.We derived dense two-phase turbulent flow governing equation of power law fluid with particles.We used our proposed model to simulate two-phase turbulent flow of power law fluid in centrifugal pump impellers.The results show preliminarily that:(1) velocity is continuously decreasing from impeller’s inlet to outlet,and pressure increases gradually as radius increases gradually from inlet to outlet;(2) pressure on suction surface is lower than that on pressure surface; pseudo-temperature of particles at suction surface is lower than that at pressure surface;pseudo-temperature of particles near wall is higher than that in interior;(3) both the pseudo-temperature of particles and the turbulent kinetic energy of the two-phase flow of power law fluid with particles are respectively lower than those of the liquid-solid two phase flow.更多还原