喷水减温阀离心喷嘴雾化性能的优化研究

为了探索喷水减温阀喷嘴结构参数变化对其雾化效果的影响,优化喷嘴结构参数,根据Fluent软件VOF模块对喷水减温调节阀的离心喷嘴进行气-液两相仿真分析。以喷嘴出口直径、旋流槽倾斜角、旋流室收缩角作为优化因素,以雾化锥角、流量系数作为雾化性能的评价指标,进行正交实验设计。基于响应面法建立雾化锥角和流量系数的代理模型,再运用粒子群优化算法对代理模型进行寻优,得到一个最优结构参数。结果表明:当出口直径为2.55 mm,旋流槽角度为40°,旋流室角度为110°时,雾化性能得到最优,雾化锥角比原模型增大17.7％,流量系数增大32.53％,为喷嘴的设计提供了一个新的方案。

Optimization of Atomization Performance of Centrifugal Nozzle with Spray Desuperheating Valve

In order to understand the influence of nozzle structural parameters of spray desuperheating valve on atomization performance and optimize the nozzle structural parameters, the simulation analysis of centrifugal nozzle was carried out based on VOF method, and the orthogonal experimental design was carried out with nozzle outlet diameter, inclination angle of swirl groove and contraction angle of swirl chamber as optimization factors, and atomization cone angle and flow coefficient as evaluation indexes of atomization performance. The polynomial response surface surrogate model is established, and then the particle swarm optimization algorithm is used to optimize the surrogate model, and the optimal structural parameters are obtained. The results show that among the three structural parameters, the nozzle outlet diameter has the greatest influence on the atomization performance, and the increase of the outlet diameter can significantly increase the atomization cone angle and reduce the discharge coefficient; When the outlet diameter is 2.55 mm, the swirl groove angle is 40° and the swirl chamber angle is 110°, the atomization performance is optimized, the atomization cone angle increases by 17.7% and the discharge coefficient increases by 32. 53% compared with the original model, which provides a new scheme for the design of nozzle.