DNS and PSE study on the stabilization effect of hypersonic boundary layer waves using 2-D surface roughness

2016 ◽  
Author(s):  
Kahei Danny Fong ◽  
Xiaolin Zhong
Keyword(s):  
Boundary Layer ◽  
Surface Roughness ◽  
Hypersonic Boundary Layer ◽  
Stabilization Effect

scholarly journals Stabilization of a hypersonic boundary layer using a felt-metal porous coating

2015 ◽  
Vol 769 ◽  
pp. 729-739 ◽  
Author(s):  
R. C. Tritarelli ◽  
S. K. Lele ◽  
A. Fedorov
Keyword(s):  
Boundary Layer ◽  
Original Work ◽  
Porous Coating ◽  
Hypersonic Boundary Layer ◽  
The Novel ◽  
Porous Coatings ◽  
Hypersonic Boundary Layers ◽  
Second Mode ◽  
Stabilization Effect ◽  
Stability Results

An error in the complex representation of the porous-coating model used in the study by Fedorov et al. (J. Fluid Mech., vol. 479, 2003, pp. 99–124), investigating the stabilization effect of ultrasonically absorptive coatings on hypersonic boundary layers, is pointed out and corrected. This error has been acknowledged by Fedorov et al. (J. Fluid Mech., vol. 769, 2015, pp. 725–728). The corrected version of the erroneous linear stability results of the original work is presented and previously made conclusions are reassessed. The novel numerical results indicate that second-mode instabilities are shifted to lower frequencies on felt-metal porous coatings, similar to the behaviour observed on porous coatings with regular microstructure.

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