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Wall‐cooling effect on linear stability of compressible streamwise corner‐flow
Author(s) -
Staudenmeyer Jennifer,
Rist Ulrich
Publication year - 2016
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201610313
Subject(s) - adiabatic wall , adiabatic process , mechanics , flow (mathematics) , compressibility , reynolds number , compressible flow , materials science , thermodynamics , linear stability , mach number , physics , instability , turbulence
The influence of constant wall temperatures on the compressible flow along a right‐angled corner and its stability behaviour is investigated by temporal local linear stability analysis. Wall‐cooling up to 90 % of the adiabatic wall‐temperature for a subsonic flow ( Ma = 0.95) is considered. The maximum cross‐flow velocity along the corner bi‐sector for the base flow with adiabatic wall boundary condition is higher than for the base flow with constant adabatic wall‐temperature. For increasing wall temperature, the amplification rate of the viscous modes decreases to a lesser extent than that of the corner mode, therefore the critical Reynolds‐number is further on defined by the first viscous mode. The spatial behaviour is displayed using N‐factors computed from Gaster‐transformed modes. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)