贯流风机内部旋涡非定常演化的数值模拟

被引:16
作者
游斌
吴克启
机构
[1] 华中科技大学能源与动力工程学院
[2] 华中科技大学能源与动力工程学院 湖北 武汉
[3] 湖北 武汉
关键词
CFD; 贯流风机; 非定常演化; 旋涡;
D O I
暂无
中图分类号
O354 [气体动力学(可压缩流体力学)];
学科分类号
080103 ; 080704 ;
摘要
本文采用非定常三维Navier-Stokes方程、κ-ε两方程模型分析了贯流风机内部旋涡产生、发展、耗散、消失的演化过程。数值模拟显示:偏心涡产生于进气侧,随后横穿叶轮内部朝出气侧移动,最后位于出气侧叶片内圆周上。叶轮外圆周脱落的旋涡是不稳定的,它们互相融合,最后被吸入叶轮内部。数值模拟的结果显示偏心涡先于贯流而产生,是由于偏心涡的存在导致了贯流的产生,并非贯流形成了偏心涡。本文证实了ECK的旋涡理论和文献[3]的实验结果。
引用
收藏
页码:238 / 240
页数:3
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