NUMERICAL STUDY OF THE DISTURBANCES GENERATED BY MICROJETS IN A SUPERSONIC FLAT PLATE BOUNDARY LAYER

2021 ◽  
Author(s):  
Andrei Valerievich Novikov ◽  
Alexander Vitalievich Fedorov ◽  
Ivan Vladimirovich Egorov ◽  
Anton Olegovich Obraz ◽  
Nikolay Nikolaevich Semenov
Keyword(s):  
Boundary Layer ◽  
Flat Plate ◽  
Numerical Study ◽  
Plate Boundary ◽  
Flat Plate Boundary Layer

Numerical Study of Nanosecond Pulsed Plasma Actuator in Laminar Flat Plate Boundary Layer

2016 ◽  
Vol 20 (5) ◽  
pp. 1424-1442 ◽  
Author(s):  
J. G. Zheng ◽  
J. Li ◽  
Z. J. Zhao ◽  
Y. D. Cui ◽  
B. C. Khoo
Keyword(s):  
Boundary Layer ◽  
Shock Wave ◽  
Flat Plate ◽  
Numerical Study ◽  
Wave Train ◽  
Plate Boundary ◽  
Flow Separation Control ◽  
Strong Control ◽  
Flat Plate Boundary Layer ◽  
Residual Heat

AbstractNanosecond (ns) pulsed dielectric barrier discharge (DBD) actuator in a laminar flat plate boundary layer is investigated numerically in an attempt to gain some new insights into the understanding of ns DBD actuation mechanism. Special emphasis is put on the examination, separation and comparison of behaviors of discharge induced micro shock wave and residual heat as well as on the investigation of response of external flow to the two effects. The shock wave is found to introduce highly transient, localized perturbation to the flow and be able to significantly alter the flow pattern shortly after its initiation. The main flow tends to quickly recover to close to its undisturbed state due to the transient nature of perturbation. However, with the shock decay and final disappearance, another perturbation source in the vicinity of discharge region, which contains contribution from both residual heat and shock, becomes increasingly pronounced and eventually develops into a perturbation wave train in the boundary layer. The perturbation is relatively weak and may not be a Tollmien-Schlichting (TS) wave and not trigger the laminar-turbulent transition of boundary layer. Instead, it is more likely to manipulate the flow stability to achieve the strong control authority of this kind of actuation in the case of flow separation control. In addition, a parametric study over the different electrical and hydrodynamic parameters is also conducted.

Interaction of intersecting shocks with a flat-plate boundary layer in the presence of an entropy layer

2013 ◽  
Vol 48 (5) ◽  
pp. 636-647 ◽  
Author(s):  
V. Ya. Borovoy ◽  
I. V. Egorov ◽  
V. E. Mosharov ◽  
V. N. Radchenko ◽  
A. S. Skuratov ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Flat Plate ◽  
Plate Boundary ◽  
Entropy Layer ◽  
Flat Plate Boundary Layer

scholarly journals A Theory for Wake-Induced Transition

1989 ◽  
Author(s):  
R. E. Mayle ◽  
K. Dullenkopf
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Turbulent Flow ◽  
Flat Plate ◽  
Free Stream ◽  
Plate Boundary ◽  
Transition Model ◽  
Model Comparisons ◽  
Turbulent Wakes ◽  
Flat Plate Boundary Layer

A theory for transition from laminar to turbulent flow as the result of unsteady, periodic passing of turbulent wakes in the free stream is developed using Emmons’ transition model. Comparisons made to flat plate boundary layer measurements and airfoil heat transfer measurements confirm the theory.

VORTEX METHOD SIMULATION OF BLASIUS' FLAT-PLATE BOUNDARY LAYER

2014 ◽  
Vol 6 (6) ◽  
pp. 535-539
Author(s):  
Helaine C. Santos ◽  
Victor S. Santiago ◽  
Gustavo C. R. Bodstein
Keyword(s):  
Boundary Layer ◽  
Flat Plate ◽  
Plate Boundary ◽  
Vortex Method ◽  
Flat Plate Boundary Layer
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