基于综合评价函数的冷却风扇蜗壳多参数优化  

Multi-parameter Optimization of Volute of Cooling Fan Based on a Comprehensive Evaluation Function

作　　者：骆清国[1] 尹洪涛[1] 宁兴兴[1] 

机构地区：[1]装甲兵工程学院机械工程系,北京100072

出　　处：《兵工学报》2016年第4期584-590,共7页Acta Armamentarii

基　　金：总装备部"十二五"预先研究项目(40402010103);武器装备预先研究项目(104010201)

摘　　要：为提高冷却风扇蜗壳的综合性能,建立包含U型蜗壳半圆段半径R、蜗壳高度H、蜗壳半圆段圆心与叶轮中心的偏差(X、Y)、叶轮底面与蜗壳内壁的距离ZP等参数的蜗壳参数化计算流体力学模型。对初始模型进行了验证。建立蜗壳的综合评价模型,利用熵权法计算了综合评价函数中蜗壳体积、风扇功耗和1/风量等指标的权重。以综合评价函数为目标函数,采用响应面法对蜗壳进行了优化。研究结果表明:蜗壳半圆段半径R和蜗壳高度H是蜗壳综合评价函数的主要影响因素;随着R和H的增大,综合评价函数先减小、后增大;经过优化后,蜗壳综合评价函数值减小了23.43%,性能显著改善,证明该方法能够应用于冷却风扇蜗壳的优化设计。To improve the comprehensive performance of volute,a parametric computational fluid dymamics model of a U-shaped fan volute with the radius of semicircle segment,the height of volute,the deviation of the center of semicircle segment from the center of impeller,and the distance from bottom surface of impeller to volute internal wall is established,which is verified by experiments. A comprehensive evaluation model of volute is established,where the weights of indexes in the model,such as volume of volute,power consumption of cooling fan,and 1 / air mass flow rate,are calculated with entropy method.The volute is optimized using response surface method by taking the comprehensive evaluation value as objective function. The results show that the radius R of semicircle section and the height H of volute are the main factors affecting the comprehensive evaluation function. With the increase in H and R,the comprehensive evaluation function decreases firstly and then increases. After optimizing,the comprehensive evaluation function value of volute is reduced by 23. 43%,of which the performance is improved significantly. The research shows the proposed method can be used for the optimization design of volute of cooling fan.

关 键 词：兵器科学与技术 冷却风扇蜗壳 综合评价函数 多参数优化 响应面法 

分 类 号：TK424.2[动力工程及工程热物理—动力机械及工程]