摘要
数值模拟了离心风机蜗壳在非定常气动载荷下的动力响应。首先考虑蜗壳与轮盘轮盖之间的间隙及轮盖处的内泄露,模拟了T9-19No.4A离心通风机内部三维非定常流场。然后将作用在蜗壳表面的非定常气动力加载给蜗壳模型,并采用有限元方法对蜗壳进行动力响应计算,实现了从流体到结构的单向耦合。最后将实验测量和数值计算蜗壳的振幅进行对比,结果吻合良好,表明本文的方法能够较为准确地模拟蜗壳在内部流场脉动压力激励下的动力响应。
A three-dimensional numerical simulation of the complete unsteady flow in T9-19No.4A centrifugal fan is carried out.The gap between volute and impeller and inner leakage were considered in the model.Then surface forces were loaded to the FEA model of volute.Unidirectional weakly coupling between volute and inner flow of the fan was evaluated. The numerical simulation coincides well with the experimental results of displacement amplitude.
出处
《应用力学学报》
CAS
CSCD
北大核心
2009年第3期450-455,共6页
Chinese Journal of Applied Mechanics
关键词
离心风机
蜗壳
流固耦合
动力响应
centrifugal fan, volute, fluid-structure interaction, dynamic response.
作者简介
卢傅安，男，1981年生，西安交通大学能源与动力工程学院流体机械研究所，博士生；研究方向——流体机械振动与噪声。E—mail：lufuan@tom．com
