图书馆订阅: Guest
Third Symposium on Turbulence and Shear Flow Phenomena
June, 25-27, 2003, International Center, Sendai, Japan

DOI: 10.1615/TSFP3

LARGE EDDY SIMULATION OF SUPERSONIC AXISYMMETRIC BASEFLOW

pages 1157-1162
DOI: 10.1615/TSFP3.1930
Get accessGet access

摘要

Flows around missiles, rockets and projectiles often experience baseflow separation. This means that the pressure behind the base is considerably lower than the freestream pressure, causing base drag that often constitutes a large portion of the total drag. The present study is motivated by the fact that most methods used for reducing the drag often also reduce the aerodynamic stability of the vehicle. Semianalytical methods and Reynolds Average Navier-Stokes (RANS) models often fail to provide accurate results for such flows, and therefore we use Large Eddy Simulations (LES) to investigate the flow physics of axisymmetric baseflow in a configuration for which experimental data is available for comparison. Good agreement with experimental data, with and without, base bleed is obtained for several LES models, suggesting that the details of the subgrid model are of less importance. The simulation data are also examined with the intention of increasing our knowledge of the underlying flow physics.

Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集 订购及政策 Begell House 联系我们 Language English 中文 Русский Português German French Spain