Investigation of the Flow Structure on a Flat Plate Induced by Unsteady Plasma Actuation with DNS Methods

2015 ◽  
Vol 17 (12) ◽  
pp. 1032-1037 ◽  
Author(s):  
Jianyang Yu ◽  
Fu Chen ◽  
Huaping Liu ◽  
Yanping Song
Keyword(s):  
Flat Plate ◽  
Flow Structure ◽  
Plasma Actuation

Flow Field Analysis of Under-Expanded Supersonic Jets Impinging on an Inclined Flat Plate: Analysis With PSP/Schlieren Images and CFD Simulations

2005 ◽  
Author(s):  
Kozo Fujii ◽  
Akira Oyama ◽  
Nobuyuki Tsuboi ◽  
Moto Tsukada ◽  
Hirofumi Ouchi ◽  
...  
Keyword(s):  
Flat Plate ◽  
Flow Structure ◽  
Pressure Ratio ◽  
Three Dimensional ◽  
Flow Fields ◽  
Field Analysis ◽  
Geometrical Parameters ◽  
Complex Flow ◽  
Plate Analysis ◽  
Complex Flow Structure

Flow fields of Mach number 2.2 jet impinging on an inclined flat plate are experimentally investigated using the Pressure Sensitive Paints (PSP) and Schlieren flow visualization. The flow filed structure is mainly determined by two geometrical parameters (nozzle-plate distance and plate angle against the jet) and one flow parameter (pressure ratio). The results suggest that all the observed flow fields can actually be classified into three types of flow structure based on the three parameters above. As an extension of the authors’ earlier work, experiments are carried out for higher plate angles. The new results show the effectiveness and limitation of the classification that we proposed. To find out the flow structure, some of the flow fields are computationally simulated. Good agreement of the pressure distributions with the experiment validates the simulation. Although analysis so far is limited, the result reveals three dimensional complex flow structure that created pressure peaks over the plate surface.

scholarly journals Flow Structure and Heat Transfer of Jet Impingement on a Rib-Roughened Flat Plate

Energies ◽  
2018 ◽  
Vol 11 (6) ◽  
pp. 1550 ◽  
Author(s):  
Abdulrahman Alenezi ◽  
Abdulrahman Almutairi ◽  
Hamad Alhajeri ◽  
Abdulmajid Addali ◽  
Abdelaziz Gamil
Keyword(s):  
Heat Transfer ◽  
Flat Plate ◽  
Flow Structure ◽  
Jet Impingement ◽  
Rib Roughened

scholarly journals Experimental Study on the Flow Characteristics of Streamwise Inclined Jets in Crossflow on Flat Plate

1992 ◽  
Author(s):  
Sang Woo Lee ◽  
Joon Sik Lee ◽  
Sung Tack Ro
Keyword(s):  
Experimental Study ◽  
Flat Plate ◽  
Flow Structure ◽  
Velocity Ratio ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Slight Variation ◽  
Injection Angle ◽  
Large Velocity ◽  
Vorticity Dynamics

Experimental study has been conducted to investigate the flow characteristics of streamwise 35° inclined jets, injected into a turbulent crossflow boundary layer on a flat plate. Flow is visualized by schlieren photographs for both normal and inclined jets to determine the overall flow structure with the variation of the velocity ratio. Three-dimensional velocity field is measured for two velocity ratios of 1.0 and 2.0 by using a five-hole directional probe. The visualization study shows that a slight variation of the injection angle produces a significant change in the flow structure. It is recognized that the jet flow is mainly dominated by the turbulence for a small velocity ratio, but it is likely to be influenced by an inviscid vorticity dynamics for a large velocity ratio. Such a trend prevails in the streamwise inclined injection, compared with the normal injection. A pair of bound vortices accompanied with a complex three-dimensional flow is present in the downstream region of the jet exit as in the case of the normal injection, although its magnitude and range are different, and the strength of the bound vortex is strongly dependent on the velocity ratio. The interface between the jet and the crossflow is identified from the vorticity distribution.

0702 Numerical Analysis of Vortex Flow Structure and Force Induced by Moving Flat Plate using Vortex Method

2015 ◽  
Vol 2015 (0) ◽  
pp. _0702-1_-_0702-5_
Author(s):  
Yusuke KUNII ◽  
Alex John SEPNOV ◽  
Fuminori HIOKI ◽  
Shinnosuke OBI
Keyword(s):  
Numerical Analysis ◽  
Flat Plate ◽  
Flow Structure ◽  
Vortex Flow ◽  
Vortex Method
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