Film cooling via tangential wall injection is universally employed to alleviate serious aerodynamic heating of the optical window in high-speed target-seeking vehicles; nevertheless the imaging quality should be concomitantly concerned due to the turbulence-aberrated aero-optical phenomenon. This flow phenomenon can be essentially abstracted into the combinational mixing layer and turbulent boundary flow configuration, enabling numerical investigation using an explicit fifth-order weighted compact nonlinear scheme (WCNS-E-5) and a ray-tracing method. The current study considers both the aero-optical effect in a prescribed light pupil and the wall temperature under adiabatic conditions, with snapshots of vorticity contours in the symmetric plane and the wall normal density fluctuation introduced as auxiliary variables for analyzing the flowfield behavior. A parametric investigation on tangential wall injection is conducted by altering the Mach number, total temperature, and total pressure consequently via a variable-controlling procedure. The results reveal that the mutual realization of aero-optical and aero-heating reduction presents considerable difficulty, so that the future optimization of the operating conditions is suggested for engineering applications.
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March 2021
Research Article|
March 05 2021
Aero-optical and aero-heating effects of supersonic turbulent boundary layer with a tangential wall-injection film Available to Purchase
Xi-Wan Sun (孙喜万)
;
Xi-Wan Sun (孙喜万)
College of Aerospace Science and Engineering, National University of Defense Technology
, Changsha, Hunan 410073, People's Republic of China
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Xiao-Liang Yang (杨小亮)
;
Xiao-Liang Yang (杨小亮)
a)
College of Aerospace Science and Engineering, National University of Defense Technology
, Changsha, Hunan 410073, People's Republic of China
Search for other works by this author on:
Wei Liu (刘伟)
Wei Liu (刘伟)
a)
College of Aerospace Science and Engineering, National University of Defense Technology
, Changsha, Hunan 410073, People's Republic of China
Search for other works by this author on:
Xi-Wan Sun (<span class='lang' lang='zh'>孙喜万</span>)
College of Aerospace Science and Engineering, National University of Defense Technology
, Changsha, Hunan 410073, People's Republic of China
Xiao-Liang Yang (<span class='lang' lang='zh'>杨小亮</span>)
a)
College of Aerospace Science and Engineering, National University of Defense Technology
, Changsha, Hunan 410073, People's Republic of China
Wei Liu (<span class='lang' lang='zh'>刘伟</span>)
a)
College of Aerospace Science and Engineering, National University of Defense Technology
, Changsha, Hunan 410073, People's Republic of China
Physics of Fluids 33, 035118 (2021)
Article history
Received:
January 13 2021
Accepted:
January 31 2021
Citation
Xi-Wan Sun, Xiao-Liang Yang, Wei Liu; Aero-optical and aero-heating effects of supersonic turbulent boundary layer with a tangential wall-injection film. Physics of Fluids 1 March 2021; 33 (3): 035118. https://doi.org/10.1063/5.0044025
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