• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>2nd International Symposium on Computational Wind Engineering (CWE 96) Fort Collins, Colorado, USA August 4-8, 1996 >Unsteady aerodynamic force prediction on a squre cylinder using k-epsilon turbulence models
【24h】

Unsteady aerodynamic force prediction on a squre cylinder using k-epsilon turbulence models

机译：基于kε湍流模型的方筒非定常空气动力预测

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In designing structurally safe large-scale civil structures, the dynamic structural behavior in response to unsteady wind loadings should be investigated. Since a typical civil structure is a blunt body, flow separates, reattaches, and forms an unsteady vortex in the wake region behind the structure. Convent ional k-epsilon turbulence models have failed in peredicting unsteady turbulent flows around blunt bodies, unless careful modifications suited to the specific cases were made. Systematic investigation of numerical effects on the computation of turbulent flows over a squre cylinder has been made. It has been found that some conventional k-epsilon models may give reasonable predictions when proper numerical parameters are incorporated. Critical numerical aspects are found to be the near-wall grid spacing and the choice of convection schemes, while the temporal accuracy effect is not so important. A numerical prediction is compared in detail not only with experimental measurements but also witht he results from a sophisticated turbulence simulation.
机译：在设计结构安全的大型土木结构时，应研究响应于非稳定风荷载的动态结构行为。由于典型的土木结构是钝体，因此流动会分离，重新附着并在结构后面的尾流区域中形成不稳定的涡流。常规的k-ε湍流模型无法消除钝体周围不稳定的湍流，除非对特定情况进行了仔细的修改。系统地研究了数值计算对方形气缸上湍流的影响。已经发现，当结合适当的数值参数时，一些常规的k-ε模型可以给出合理的预测。发现关键的数值方面是近壁网格间距和对流方案的选择，而时间精度的影响并不那么重要。不仅将数值预测与实验测量结果进行了详细比较，而且还将其与复杂的湍流模拟结果进行了比较。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号