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

• Published in: Thermal engineering Vol. 58; no. 13; pp. 1069 - 1078
• Main Authors: Davletshin, I. A., Dushina, O. A., Zan’ko, F. S., Mikheev, N. I., Molochnikov, V. M.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 2011; Springer
• 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; Heat Transfer Enhancement; Heat Transfer; Separation Flow; Separation Region; Separation Bubble; Electric power plant; Turbulent flow; Equipment; Electroenergetics; Heat flow; Hydrodynamics; Dimension; Experimental study; Heat transfer; Pulsating flow
• ISSN: 0040-6015; 1555-6301
• DOI: 10.1134/S0040601511130040

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.