一种七喷嘴细水雾喷头的设计与仿真

为解决单喷嘴细水雾喷头雾化锥角较小及多喷嘴组合式细水雾喷头体积与流量较大等问题，设计一种新型直射混合旋流式七喷嘴的细水雾喷头，研究喷头结构参数与型式对喷头雾化效果的影响，并在多个压力工况下对最优结构配比喷头进行数值模拟。仿真结果表明:新型七喷嘴直射混合旋流式细水雾喷头能够获得较大轴向动量和径向动量，且由7个喷嘴有效地增大了喷头的雾化保护锥角，在1.2 MPa工况理想状况下喷雾保护锥角最大可达146.3°，流量特性系数K在3.82~3.87之间，具有足够的喷射强度。  

Design and Simulation of Water Mist with Seven-nozzle

In order to solve problem that atomization angle of the single- nozzle with water mist is too small and the problem that volume and flow of combined multi-nozzle with water mist is too big, a new type of seven-nozzle with perpendicular incidence rotational flow atomization water mist has been designed by studying the effect of the structural parameters and the type of the nozzle on nozzle atomization and having numerical simulation on the nozzle under optimal structural control and multi-pressure. The simulation result shows that: the new type of seven-nozzle can acquire greater axial and radial momentum; the structure of the seven-nozzle effectively enlarges the atomization angle; under the pressure of 1.2Mpa, the maximum angle can enlarge to 146.3°; the nozzle has enough jetting strength because the flow coefficient K of the seven-nozzle is between 3.82 and 3.87.