Drag on flat plates of arbitrary porosity
Drag on flat plates of arbitrary porosity
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DOI：
10.1017/jfm.2018.621
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发表时间：
2018-08
影响因子：
3.7
通讯作者：
K. Steiros;M. Hultmark
中科院分区：
文献类型：
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作者：
K. Steiros;M. Hultmark
本文提出了一种新的二维平板曳力模型，该模型垂直于自由流方向，具有任意孔隙率。该模型是Koo和James（J. Fluid Mech.，第60（3）卷，1973年，第120页。513-538），其中低孔隙率下的性能通过包括底部抽吸项而得到改善。底部吸力引起的附加阻力采用动量理论隐式计算，使模型自成一体。该模型的预测表现出令人信服的协议与实验观察范围广泛的孔隙率，包括固体的情况下，只要脱落是不存在或抑制。
A new model for the drag force on a two-dimensional flat plate of arbitrary porosity, oriented normal to the free stream, is introduced. The model is an extension of that introduced by Koo & James (J. Fluid Mech., vol. 60(3), 1973, pp. 513–538), where the performance at low porosities is improved by including a base-suction term. The additional drag due to the base suction is calculated implicitly using momentum theory, which makes the model self-contained. The model predictions exhibit convincing agreement with experimental observations over a wide range of porosities, including the solid case, as long as shedding is absent or suppressed.