Turbulent flow separation and characteristics of heat transfer under unsteady hydrodynamic conditions

Results from an experimental study of hydrodynamics and heat transfer in turbulent separation flow under the conditions of its periodic pulsations are presented. It is found that an essential change occurs in the spatial and timing structure of separation flow under the effect of superimposed unstea...

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Bibliographic Details
Published in:Thermal engineering 2011, Vol.58 (13), p.1069-1078
Main Authors: Davletshin, I. A., Dushina, O. A., Zan’ko, F. S., Mikheev, N. I., Molochnikov, V. M.
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Engineering
Engineering Thermodynamics
Exact sciences and technology
Heat and Mass Transfer
Heat transfer
Installations for energy generation and conversion: thermal and electrical energy
Theoretical studies. Data and constants. Metering
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Summary:Results from an experimental study of hydrodynamics and heat transfer in turbulent separation flow under the conditions of its periodic pulsations are presented. It is found that an essential change occurs in the spatial and timing structure of separation flow under the effect of superimposed unsteadiness. Phenomena involving reduction of the longitudinal dimensions of the separation region and essential enhancement of heat transfer in the separation region of pulsating flow are revealed. The physical mechanism of these phenomena is described.
ISSN:0040-6015
1555-6301
DOI:10.1134/S0040601511130040