Turbulent Heat Flux Model for Hypersonic Shock–Boundary Layer Interaction

AIAA Journal ◽  
2019 ◽  
Vol 57 (8) ◽  
pp. 3624-3629 ◽  
Author(s):  
Subhajit Roy ◽  
Krishnendu Sinha
Keyword(s):  
Boundary Layer ◽  
Heat Flux ◽  
Turbulent Heat Flux ◽  
Turbulent Heat ◽  
Layer Interaction ◽  
Shock Boundary Layer Interaction ◽  
Boundary Layer Interaction ◽  
Flux Model ◽  
Hypersonic Shock ◽  
Heat Flux Model

scholarly journals Effects of Crack on Heat Flux in Hypersonic Shock/Boundary-Layer Interaction

2010 ◽  
Vol 58 (674) ◽  
pp. 68-75
Author(s):  
Hiroshi OZAWA ◽  
Katsuhisa HANAI ◽  
Keiichi KITAMURA ◽  
Koichi MORI ◽  
Yoshiaki NAKAMURA
Keyword(s):  
Boundary Layer ◽  
Heat Flux ◽  
Layer Interaction ◽  
Shock Boundary Layer Interaction ◽  
Boundary Layer Interaction ◽  
Hypersonic Shock

scholarly journals Effect of wall temperature on separation bubble size in laminar hypersonic shock/boundary layer interaction flows

2019 ◽  
Vol 11 (11) ◽  
pp. 168781401988555 ◽  
Author(s):  
Amjad A Pasha ◽  
Khalid A Juhany
Keyword(s):  
Boundary Layer ◽  
Heat Flux ◽  
Mach Number ◽  
Wall Temperature ◽  
Separation Bubble ◽  
Layer Interaction ◽  
Shock Boundary Layer Interaction ◽  
Boundary Layer Interaction ◽  
Hypersonic Shock ◽  
Bubble Length

At hypersonic speeds, the external wall temperatures of an aerospace vehicle vary significantly. As a result, there is a considerable heat transfer variation between the boundary layer and the wall of the hypersonic vehicle. In this article, numerical computations are performed to investigate the effect of wall temperature on the separation bubble length in laminar hypersonic shock-wave/boundary-layer interaction flows over double-cone configuration at the Mach number of 12.2. The flow field is described in detail in terms of different shocks, expansion fans, shear layer and separation bubble. The variation of the Prandtl number has a negligible effect on the flow field and wall data. A specific heat ratio of less than 1.4 results in the better prediction of wall pressure and heat flux in the shock/boundary-layer interaction region. It is observed that as the wall temperature is increased, the separation bubble size and hence the separation shock length increases. The high firmness of the laminar boundary-layer at a high Mach number shows that the wall temperature in the shock/boundary-layer interaction region has little effect. The peak wall pressure and heat flux decrease with an increase in wall temperature. An estimation is developed between separation bubble length and wall temperature based on the computed results.

Direct Numerical Simulation and RANS Modeling of Turbulent Natural Convection for Low Prandtl Number Fluids

2004 ◽  
Author(s):  
I. Otic´ ◽  
G. Gro¨tzbach
Keyword(s):  
Numerical Simulation ◽  
Heat Flux ◽  
Kinetic Energy ◽  
Prandtl Number ◽  
Direct Numerical Simulation ◽  
Turbulent Heat Flux ◽  
Turbulent Heat ◽  
Temperature Variance ◽  
Flux Model ◽  
Heat Flux Model

Results of direct numerical simulation (DNS) of turbulent Rayleigh-Be´nard convection for a Prandtl number Pr = 0.025 and a Rayleigh number Ra = 105 are used to evaluate the turbulent heat flux and the temperature variance. The DNS evaluated turbulent heat flux is compared with the DNS based results of a standard gradient diffusion turbulent heat flux model and with the DNS based results of a standard algebraic turbulent heat flux model. The influence of the turbulence time scales on the predictions by the standard algebraic heat flux model at these Rayleigh- and Prandtl numbers is investigated. A four equation algebraic turbulent heat flux model based on the transport equations for the turbulent kinetic energy k, for the dissipation of the turbulent kinetic energy ε, for the temperature variance θ2, and for the temperature variance dissipation rate εθ is proposed. This model should be applicable to a wide range of low Prandtl number flows.

Assessment and calibration of an algebraic turbulent heat flux model for low-Prandtl fluids

2014 ◽  
Vol 79 ◽  
pp. 589-601 ◽  
Author(s):  
A. Shams ◽  
F. Roelofs ◽  
E. Baglietto ◽  
S. Lardeau ◽  
S. Kenjeres
Keyword(s):  
Heat Flux ◽  
Turbulent Heat Flux ◽  
Turbulent Heat ◽  
Flux Model ◽  
Heat Flux Model

Algebraic Turbulent Heat Flux Model for Prediction of Thermal Stratification in Piping Systems

2013 ◽  
Vol 181 (1) ◽  
pp. 144-156
Author(s):  
M. Pellegrini ◽  
H. Endo ◽  
E. Merzari ◽  
H. Ninokata
Keyword(s):  
Heat Flux ◽  
Thermal Stratification ◽  
Turbulent Heat Flux ◽  
Turbulent Heat ◽  
Piping Systems ◽  
Flux Model ◽  
Heat Flux Model
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