静动干涉流动的分离涡模拟研究  

DETACHED EDDY SIMULATION FOR THE STATOR-ROTOR INTERACTION

作　　者：李雪松[1] 奉凡[1] 顾春伟[1] 

机构地区：[1]清华大学热能工程系热科学与动力工程教育部重点实验室,北京100084

出　　处：《工程热物理学报》2009年第6期953-956,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50776051);国家重点基础研究发展计划资助(No.2007CB210105)

摘　　要：本文基于一种并行高精度的静动交接面处理方法,采用了SA模型及基于SA的分离涡模拟DES方法,进行了某压气机静动干涉流动的计算。研究表明对本文算例,在微小分离处,如20%到80%叶高处,DES与SA计算出的流动损失相差很小;而在大分离处,如叶根叶顶处,DES结果与SA差别较大,并且DES可更好地描述涡结构。在叶顶处,DES计算出比SA更强的泄漏流动,导致更大的损失。在叶根处,DES计算出了明显的静叶动态尾迹涡脱落现象,这一现象导致了与SA不一样的损失机理,即脱落涡与动叶头部相撞而产生时序效应,从而使计算损失较小。同时,本文研究结果与之前对孤立静叶的研究是相互验证的。Based on a high-accuracy and large-scale-parallel method, SA model and detached eddy simulation （DES） based on SA were employed to research the flows of compressor stator-rotor interaction. Results show that DES has better capability to describe the structures of flow field than SA. In the flow regions with shallow separations such as regions from 20% span to 80% span in this example, DES obtain similar results as SA simulation. Compared with SA, however, DES predicts obvious higher loss in the rotor tip regions because it obtains stronger leakage and double leakage flows. DES also captures dynamic vortex shedding of the wake that leads to impinging between the shedding vortices and the leading edge of the rotor near the hub. This flow mechanism is similar to ＂clocking＂ effect that explains lower loss near the hub. Results in this paper also validate the previous research for DES of isolated compressor stator each other.

关 键 词：分离涡模拟 静动干涉 尾迹 叶顶泄漏流 损失机理 

分 类 号：O345[理学—固体力学]