建筑风压场数值模拟中压力波动的平抑  

Elimination of pressure wiggles in numerical simulation of wind pressure around buildings

作　　者：王辉[1] 陈水福[2] 唐锦春[2] 

机构地区：[1]合肥工业大学土建学院,安徽合肥230009 [2]浙江大学土木系,浙江杭州310027

出　　处：《计算力学学报》2007年第6期741-745,共5页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(59908010)资助项目

摘　　要：在以同位网格为基础的简单流场压力计算中,通常采用动量插值方法来平抑流场中的压力波动现象;但是对于建筑风场等复杂的钝体绕流问题,由该平抑方法得到的收敛风压场仍可能存在小幅波动。为彻底解决同位网格格式下的压力波动,除采用动量插值方法外,本文提出了在压力校正方程的界面流速中添加压力梯度差值项的方法。算例分析表明,该方法计算得到的建筑风压场完全避免了压力波动现象,风压解与试验结果吻合良好。When the nonstaggered grid was applied to the calculation of ordinary flow, the momentum interpolation method could eliminate the possible pressure wiggles. But in the calculation of complicated flow around the bluff body, such as the wind flow around buildings, the possible small wiggles still appeared on the convergent pressure field when the above method was adopted alone. In order to eliminate the small wiggles when nonstaggered grid was used, except for the use of the momentum interpolation method, a new method was proposed and applied at the same time. In the new method, a pressure-gradient difference term was added to the flow velocity in each control-volume interface when dealing with the mass source in pressure-correction equation. Through the evaluation and analysis, it reveals that this method overcomes the problem of pressure wiggles in the numerical simulation of wind pressure around buildings completely, and the calculational results agree with the test results.

关 键 词：计算流体动力学 建筑凤压场 数值模拟 同位网格 压力波动 

分 类 号：TU312.1[建筑科学—结构工程] V211.3[航空宇航科学与技术—航空宇航推进理论与工程]