BOUNDARY LAYER SUBJECTED TO LONGITUDINAL CONVEX AND CONCAVE CURVATURES. AND ADVERSE PRESSURE GRADIENT

E.G. Tulapurkara; A.B. Khoshnevis; J.L. Narasimhan

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BOUNDARY LAYER SUBJECTED TO LONGITUDINAL CONVEX AND CONCAVE CURVATURES. AND ADVERSE PRESSURE GRADIENT

机译：纵向凸面和凹面曲面的边界层。和不利压力梯度

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Measurement of mean velocity and turbulent quantities has been carried out when the flow develops in the boundary layer on the (i) walls of a straight duct/diffuser and (ii) convex and concave walls of a curved duct/diffuser. The curvature parameter, δ/R, and Clauser's pressure gradient parameter,β, are 0.023 and 0.62 respectively. It is confirmed that (a) the adverse pressure gradient increases boundary layer thickness and turbulence intensity, (b) convex curvature retards boundary layer development and causes reduction in turbulence intensity and (c) concave curvature increases boundary layer thickness and turbulence intensities.

机译：当流动在（i）直管/扩散器的壁和（ii）弯管/扩散器的凸壁和凹壁的边界层中发展时，已经进行了平均速度和湍流量的测量。曲率参数δ/ R和Clauser压力梯度参数β分别为0.023和0.62。可以确定的是，（a）不利的压力梯度增加了边界层的厚度和湍流强度，（b）凸曲率阻碍了边界层的发展并导致湍流强度降低，并且（c）凹曲率增加了边界层的厚度和湍流强度。

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来源
《Journal of the Aeronautical Society of India》 |2001年第3期|p.183-191|共9页
作者
E.G. Tulapurkara; A.B. Khoshnevis; J.L. Narasimhan;
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正文语种 eng
中图分类航天（宇宙航行）;
关键词
Boundary Layer; Adverse Pressure Gradient; Convex and Concave Curvature;

机译：边界层;逆压力梯度;凸和凹曲率;

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4. DNS of Turbulent Boundary Layers Subjected to Adverse Pressure Gradients [C] . Guillermo Araya, Luciano Castillo iTi Conference in Turbulence . 2012

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7. Fundamental studies on the control of turbulent boundary layers. Computation of effects on the characteristics of boundary layers, pressure decrease near the entrance convex curvature passage, and adverse pressure gradient along the convex curvature surface. [O] . Hajime YAMAGUCHI 1990

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BOUNDARY LAYER SUBJECTED TO LONGITUDINAL CONVEX AND CONCAVE CURVATURES. AND ADVERSE PRESSURE GRADIENT

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