一种新型造雪核子器的数值模拟研究

基于造雪机核心部件核子器，建立了核子器物理模型与内流域模型，利用数值模拟方法对核子器的内流场进行了计算，针对该核子器重要参数混合室长度、核子器出口直径的变化，首先采用VOF模型研究了核子器内部气液两相分布情况，并使用DPM模型研究了上述参数对核子器雾化粒径的影响，分析了雾化粒径大小及其出现频率的规律，研究核子器受关键几何参数的影响规律，为核子器结构优化提供科学依据。模拟结果表明：核子器混合室长度对其雾化效果有较大的影响，出口直径对其雾化效果有一定的影响，该核子器达到较好雾化效果的结构为混合室长度30 mm、出口直径1.1 mm。

Numerical simulation of a new snow crystal sprayer

The snow crystal sprayer is the key component of the snow maker. Its atomization effect directly determines the snow forming ability of the snow maker. The physical model and inner internal flow field of the snow crystal sprayer were established based on the snow crystal sprayer, the core component of the snow maker. The internal flow field of the snow crystal sprayer was calculated by means of numerical simulation. In view of the change of the mixing chamber length and the outlet diameter of the snow crystal sprayer, the VOF model was used to study the gas-liquid two-phase distribution in the snow crystal sprayer. The DPM model was used to study the influence of the above parameters on the atomization particle size of the snow crystal sprayer. The rule of atomization particle size and occurrence frequency was analyzed, and the influence of key geometric parameters on the snow crystal sprayer was explored. This provides a scientific basis for the structural optimization of the snow crystal sprayer. The simulation results show that the length of the mixing chamber has a great influence on the atomization effect, and the outlet diameter has a certain influence on the atomization effect. The structure of the snow crystal sprayer to achieve better atomization effect is that the length of the mixing chamber is 30 mm and the diameter of the outlet is 1.1 mm.