REPRODUCING THE REAL PRESSURE COEFFICIENT USING A COMPUTATIONAL FLUID DYNAMICS PROGRAM HOW CLOSE IS CLOSE ENOUGH ?
REPRODUCING THE REAL PRESSURE COEFFICIENT USING A COMPUTATIONAL FLUID DYNAMICS PROGRAM HOW CLOSE IS CLOSE ENOUGH ?
复制标题
使用计算流体动力学程序重现实际压力系数 多接近才算足够接近？
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
M. Donn
中科院分区：
文献类型：
--
作者：
P. Satwiko;N. Locke;M. Donn
本文报道了一个商业计算流体动力学程序CFD-ACE的校准，使用实际测量。校准的主要目的是了解CFD-ACE的建模能力及其对复杂情况的适用性。一个真实的建筑，德克萨斯理工实验大楼，被用作案例研究。校准涉及8种不同的场景，包括二维和三维模型的组合，标准k-ε和RNG k-ε湍流模型，以及均匀或大气边界层流动。结果比较了全尺寸建筑物的压力系数（Cp）数据、风洞实验结果和计算流体力学模拟结果。对结果的综合评价发现，没有一种理想的组合能完美地模拟真实现象；CFD-ACE程序对每个案例产生不同的结果。然而，结合标准k-ε湍流模型和大气边界层的三维建模似乎得到了最好的结果。与现场数据的对比表明，CFD-ACE程序能较好地再现实际情况。与参考CFD实验和风洞实验结果相比，与现场数据的偏差要小得多。CFD-ACE项目作为研究德克萨斯理工大学实验大楼周围气流的工具表现良好。
This paper reports on the calibration of a commercial computational fluid dynamics program, CFD-ACE, using real measurements. The main purpose of the calibration was to develop an understanding of the modelling capabilities of CFD-ACE and its applicability to complex situations. A real building, the Texas Tech Experimental Building, was used as a case study. The calibration involved eight different scenarios, comprising combinations of two and three-dimensional modeling, standard k-ε and RNG k-ε turbulence models, and uniform or atmospheric boundary layer flows. The results compare pressure coefficient (Cp) data from the fullscale building, wind tunnel experimental results and computational fluid dynamics simulations. A general evaluation of the results found that there was no single ideal combination that can perfectly simulate the real phenomenon; the CFD-ACE program producing different results for each case. However, the combination of 3D modeling with a standard k-ε turbulence model and an atmospheric boundary layer appeared to give the best results. Comparison with the field data showed that the CFD-ACE program could reproduce the real conditions quite well. The deviation from the field data was much smaller than the reference CFD experiment and wind tunnel experimental results. The CFD-ACE program performed well as a tool for studying the wind flow around the Texas Tech Experimental Building.