The effects of surface roughness on the flow past circular cylinders at high Reynolds numbers

1982 ◽  
Vol 123 ◽  
pp. 363-378 ◽  
Author(s):  
Y. Nakamura ◽  
Y. Tomonari
Keyword(s):  
Reynolds Number ◽  
Circular Cylinder ◽  
High Reynolds Number ◽  
Circular Cylinders ◽  
Similarity Parameter ◽  
Number Range ◽  
Pressure Distributions ◽  
Mean Pressure ◽  
Supercritical Range ◽  
High Reynolds

Measurements of’ the mean-pressure distribution and the Strouhal number on a smooth circular cylinder, circular cylinders with distributed roughness, and circular cylinders with narrow roughness strips were made over a Reynolds-number range 4.0 × l04 to 1.7 × l06 in a uniform flow. A successful high-Reynolds-number (trans- critical) simulation for a smooth circular cylinder is obtained using a smooth circular cylinder with roughness strips. High-Reynolds-number simulation can only be obtained by roughness strips and not by distributed roughness. A similarity parameter correlating the pressure distributions on circular cylinders with distributed roughness in the supercritical range is presented. The same parameter can also be applicable to the drag coefficients of spheres with distributed roughness.

scholarly journals Drag Reduction of Circular Cylinder in the High-Reynolds-Number Range.

1993 ◽  
Vol 59 (558) ◽  
pp. 342-348 ◽  
Author(s):  
Tsutomu Adachi ◽  
Hiroyuki Maeda ◽  
Masamitsu Shiono ◽  
Tetsuo Ozaki ◽  
Kazuo Matsuuchi ◽  
...  
Keyword(s):  
Reynolds Number ◽  
Circular Cylinder ◽  
Drag Reduction ◽  
High Reynolds Number ◽  
Number Range ◽  
Reynolds Number Range ◽  
High Reynolds

scholarly journals Numerical Simulation of Flow Around Two Side-by-Side Circular Cylinders at High Reynolds Number

2020 ◽  
Vol 38 (1) ◽  
pp. 77-91
Author(s):  
Hamidreza Rahimi ◽  
Xiaonan Tang ◽  
Yaser Esmaeeli ◽  
Ming Li ◽  
Alireza Pourbakhtiar
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
High Reynolds Number ◽  
Circular Cylinders ◽  
High Reynolds

scholarly journals Aerodynamics and Heat Transfer Investigations on a High Reynolds Number Turbine Cascade

1991 ◽  
Author(s):  
Taher Schobeiri ◽  
Eric McFarland ◽  
Frederick Yeh
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
High Reynolds Number ◽  
Test Facility ◽  
Experimental Investigations ◽  
Turbine Cascade ◽  
Calculation Methods ◽  
Transfer Coefficients ◽  
Pressure Distributions ◽  
High Reynolds

In this report the results of aerodynamic and heat transfer experimental investigations performed in a high Reynolds number turbine cascade test facility are analyzed. The experimental facility simulates the high Reynolds number flow conditions similar to those encountered in the space shuttle main engine. In order to determine the influence of Reynolds number on aerodynamic and thermal behavior of the blades, heat transfer coefficients were measured at various Reynolds numbers using liquid crystal temperature measurement technique. Potential flow calculation methods were used to predict the cascade pressure distributions. Boundary layer and heat transfer calculation methods were used with these pressure distributions to verify the experimental results.

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