离心风机蜗壳在内部流场脉动压力激励下的动力响应研究  

Dynamic Response of Volute of Centrifugal Fan under Aerodynamic Excition

作　　者：卢傅安[1] 祁大同[1] 蔡建程[1] 唐囡[1] 

机构地区：[1]西安交通大学,西安710049

出　　处：《应用力学学报》2009年第3期450-455,共6页Chinese Journal of Applied Mechanics

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.

关 键 词：离心风机 蜗壳 流固耦合 动力响应 

分 类 号：TB53[理学—物理]