首页|期刊导航|热科学学报（英文版）|Numerical Simulation on the Effect of Tip Clearance Size on Unsteadiness in Tip Clearance Flow
热科学学报（英文版）2008，Vol.17Issue(4)：337-342,6.
Numerical Simulation on the Effect of Tip Clearance Size on Unsteadiness in Tip Clearance Flow
Numerical Simulation on the Effect of Tip Clearance Size on Unsteadiness in Tip Clearance Flow
摘要
Abstract
Unsteadiness of tip clearance flow with three different tip clearance sizes is numerically investigated in this paper. NASA Rotor 67 is chosen as the computational model. It is found that among all the simulated cases, the un-steadiness exists when the size of the tip clearance is equal to or larger than design tip clearance size. The relative total pressure coefficient contours indicate that region of influence by tip leakage flow augments with the increase of tip clearance size at a fixed mass flow rate. Root Mean Square contours of static pressure distribution in the rotor tip region are provided to illustrate that for design tip clearance (1.1% tip chord) the strongest fluctuating region is located on pressure side of blade near leading edge, while for the larger tip clearance (2.2% tip chord), it is in the region of the interaction between the shock wave and the tip leakage flow.关键词
tip clearance flow/tip leakage flow/unsteadiness/transonic rotorKey words
tip clearance flow/tip leakage flow/unsteadiness/transonic rotor分类
数理科学引用本文复制引用
Juan Du,Feng Lin,Hongwu Zhang,Jingyi Chen..Numerical Simulation on the Effect of Tip Clearance Size on Unsteadiness in Tip Clearance Flow[J].热科学学报（英文版）,2008,17(4):337-342,6.基金项目
This work was supported by National Basic Research Program 2007CB210104 of China and National Natural Science Foundation of China, Grant 50736007. These supports are gratefully acknowledged. （）
