Effects of ridged walls on the heat transfer in a heated square duct

Turbulent flows in rectangular cooling ducts of rocket engine thrust chambers are characterized by secondary motions of Prandtl’s first and second kinds. These secondary currents play a prominent part in heat transfer between the thrust chamber and the cooling gas conveyed in the duct. Previous nume...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2005-05, Vol.48 (10), p.2050-2063
Main Authors: Vázquez, M. Salinas, Rodríguez, W. Vicente, Issa, R.
Format: Article
Language:English
Subjects:
Applied sciences
Duct
Energy
Energy. Thermal use of fuels
Engines and turbines
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Heated
LES
Physics
Ridge
Turbulence simulation and modeling
Turbulent flows, convection, and heat transfer
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Summary:Turbulent flows in rectangular cooling ducts of rocket engine thrust chambers are characterized by secondary motions of Prandtl’s first and second kinds. These secondary currents play a prominent part in heat transfer between the thrust chamber and the cooling gas conveyed in the duct. Previous numerical and experimental works reveal that attaching ridges on the walls of the duct causes the formation of new secondary flows of Prandtl’s second kind. These new structures are likely to increase the heat transfer. The present study has investigated numerically, through large eddy simulations, the effect of different forms of ridges on heat transfer in straight square duct flows.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2004.10.036