High temperature heat transfer of separated flow over a sudden-expansion with base mass injection

The high-temperature heat transfer characteristics of the hot flow stream over a sudden-expansion with cold air uniformly injected from a porous base was investigated. The heat transfer coefficient increased with increasing inlet temperature and Reynolds number, but decreased with increasing injecti...

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Bibliographic Details
Published in:International journal of heat and mass transfer 1996, Vol.39 (11), p.2293-2301
Main Authors: Yang, Jing-Tang, Tsai, Chun-Hung
Format: Article
Language:English
Subjects:
Air
Applied sciences
Boundary layer flow
Buoyancy
Combustion of gaseous fuels
Combustion. Flame
Cooling
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Flow patterns
Nusselt number
Porous materials
Reynolds number
Shear flow
Theoretical studies. Data and constants. Metering
Thermal effects
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Summary:The high-temperature heat transfer characteristics of the hot flow stream over a sudden-expansion with cold air uniformly injected from a porous base was investigated. The heat transfer coefficient increased with increasing inlet temperature and Reynolds number, but decreased with increasing injection rate of the cooling air. The local Nusselt number was affected by the Reynolds number at the inlet in the whole flow field except near the step ( X H < 4 ). The local Stanton number, however, was insensitive to the Reynolds number in the recirculation zone. After the recirculation zone, the local Stanton number was affected by the Reynolds number, although to a lesser extent than that of the Nusselt number.
ISSN:0017-9310
1879-2189
DOI:10.1016/0017-9310(95)00309-6