【摘要】 介绍了气液两相流液位调节器的工作原理及其在火电厂的应用。针对气液两相流液位调节器内部的复杂流场,利用计算流体力学商用软件PHONICS 3.4,选用k-ε湍流模型,对调节器内部压力场、速度场进行数值模拟,得到不同尺寸和类型的喷嘴对调节器内部流场分布的影响结果。模拟结果表明,喷嘴喉部直径越小,调节器前后的压损越大,喷嘴处的速度峰值越高。渐缩型喷嘴是理想的喷嘴类型。更多还原

【Abstract】 The working principle of two-phase flow liquid level controller and its application in the power plants have been presented.Directing againt the complex inner flow field of the two-phase liquid level controller,a k-ε turbulent model is selected to simulate the velocity and pressure fields in the controller by using the commercial software PHOENICS 3.4 of computational fluid dynamics,the influence of different nozzle size and type upon the velocity and pressure fields in the controller has been obtained.Results show that the smaller the throat diameter of the nozzle,the greater the total pressure loss before and after the controller,and the higher peak value of velocity through the nozzle.Moreover,the nozzle of gradually reduced type is the best type of nozzle to be used.更多还原