| 平板边界层转捩的数值模拟 |
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| 引用本文： | 蒋洪德,J.G.Moore,J.Moore.平板边界层转捩的数值模拟[J].航空动力学报,1991,6(2):157-161,188-189. |
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| 作者姓名： | 蒋洪德 J.G.Moore J.Moore |
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| 作者单位： | 1.中国科学院工程热物理研究所 |
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| 摘 要： | 对于自由湍流引起的压力梯度为零的平板边界层转捩过程的数值模拟,本文提出了一个单方程湍流模型 (VL M模型),对湍流粘性系数和湍流长度尺度都进行了修正以正确引入低雷诺数效应。数值计算表明,该模型在自由来流湍流度为 0.03～8%的大范围内能正确模拟边界层转捩全过程,包括转捩区起点位置和转捩区长度、边界层内的平均及脉动参数分布等。本文还提出了上述转捩过程的时均化五阶段模型。
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| 收稿时间： | 1990/10/1 0:00:00 |
NUMERICAL SIMULATION OF TRANSITIONAL FLOWS OVER A FLAT PLATE |
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| Jiang Hongde,J.G.Moore and and J.Moore.NUMERICAL SIMULATION OF TRANSITIONAL FLOWS OVER A FLAT PLATE[J].Journal of Aerospace Power,1991,6(2):157-161,188-189. |
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| Authors: | Jiang Hongde JGMoore and and JMoore |
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| Institution: | 1.Institute of Engineering Thermophysics2.Virginia Polytechnic Institute and State University |
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| Abstract: | A new version of one-equation turbulence model for predicting the incompressible,transitional flow over a flat plate is developed.Based on an analysis of the existing one-equation models and some physical features of the transitional flow,both the eddy viscosity and turbulence length scale in the turbulence kinetic energy equation are modified in order to bring the low Reynolds number effect into the new model.The capability of this model for predicting the transitional flow is demonstrated by an extensive numerical testing for flat plate flow under free stream turbulence intensity ranging from 0 03 to 8 percent.Both the start and length of the transition are correctly predicted.Comparison of the calcutated results of both the mean and fluctuating flow properties with experimental data indicates the agreement between them is very good. |
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