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针对最大流量原理法在设计小几何特性小孔径细水雾离心喷嘴方面的不足,采用Fluent软件中的多相流混合模型,模拟了包含蒸气和水两相的喷嘴内部流动,得到了流量、喷雾锥角等宏观参数,并和实验测量数据以及理论计算值进行了对比,分析了不同结果产生的原因;同时,还对喷嘴内的气液两相体积分数、轴向与切向速度、压力分布等流场特性参数进行了分析,着重论述了与理论模型之间的差异以及相应的机理.数值模拟方法考虑了液体的粘性和壁面摩擦力等因素,较好地反映了喷嘴内部的流场特性,为小几何特性小孔径细水雾离心喷嘴的设计提供了借鉴.
In order to overcome the shortcomings of the maximum flow principle method in designing a small geometry nozzle with small water mist, a multiphase flow mixing model in Fluent software was used to simulate the internal flow of the nozzle with vapor and water phases. The flow, spray Cone angle and other macroscopic parameters, and compared with the experimental measurement data and theoretical calculation value, analyzed the causes of different results; the same time, the nozzle gas-liquid two-phase volume fraction, axial and tangential velocity, pressure distribution And other flow field characteristics of the parameters were analyzed, with a focus on the theoretical model and the difference between the corresponding mechanism.Numerical simulation method to consider the viscosity of the liquid and the wall friction and other factors, a good reflection of the nozzle internal flow field characteristics , Which provides a reference for the design of a small water mist nozzle with small geometry.