摘要
以某车型冷却风扇为基础,借助逆向建模技术,建立了4种扇叶安装角冷却风扇模型.通过计算流体动力学(Computational Fluid Dynamics,CFD)分析,分别对比了4种风扇的静压、轴功率、静压有效功与静压效率随进风量变化的特性曲线.结果表明,随着扇叶安装角(水平夹角)的增大,最大风量、轴功率以及静压有效功均表现出增大趋势,但由于流体与扇叶间的撞击损失增大,风扇在非稳定工作区域的静压效率会随安装角的增大而不断减小,在稳定工作区域,静压效率会因静压有效功的提高而得到改善.
Based on a cooling fan of one type of vehicle, four kinds of cooling fans models with different blade installation angle were established by reverse modeling technology. By the computational fluid dynamics (CFD) analysis, the characteristic curves that the static pressure, shaft power, effective static pressure power and static pressure efficiency of the four fans changed with air intake were compared separately. The results show that with the increasing installation angle of blade (horizontal angle), the maximum air volume, shaft power, and static pressure effective power have increasing tendency. But because of the increasing of impingement loss between air flow and blades, the static-pressure efficiency of fan in unsteady working range continuously decreases with the increase of blade installation angle. However, in steady working range, the static pressure efficiency is still improved because of the increase of effective static pressure power.
作者
李超
原梅妮
袁会灵
孙明
魏文菲
LI Chao;YUAN Mei-ni;YUAN Hui-ling;SUN Ming;WEI Wen-fei(R&D Center of Great Wall Motor Company Limited, Automotive Engineering Technology Research Centerof HeBei, Baoding 071000, China;College of Mechatronics Engineering, North University of China, Taiyuan 030051, China)
出处
《中北大学学报（自然科学版）》
CAS
2019年第5期421-426,共6页
Journal of North University of China(Natural Science Edition)
关键词
冷却风扇
扇叶安装角
计算流体动力学(CFD)
风量
静压效率
cooling fan
blade installation angle
computational fluid dynamics(CFD)
air volume
static pressure efficiency
