NDLI: Aerodynamics and heat transfer in a separated flow in an axisymmetric diffuser with sudden expansion

Content Provider	Springer Nature Link
Author	Terekhov, V. I. Bogatko, T. V.
Copyright Year	2015
Abstract	Results of a numerical study of the influence of a positive pressure gradient in an axisymmetric diffuser with sudden expansion of a circular tube on aerodynamics and turbulent heat transfer in regions of flow separation, reattachment, and relaxation are reported. The air flow prior to separation is assumed to be fully turbulent and to have a constant Reynolds number Re$_{ D1}$ = 2.75 · 10$^{4}$. The tube expansion degree is 1.78, and the apex half-angle of the diffuser is varied from 0 to 5°. It is found that an increase in the pressure gradient leads to a decrease in the heat transfer intensity in the separation region, and the maximum heat release point moves away from the flow separation point. The calculated results are compared with experimental data. It is shown that the behavior of the separated flow behind the step becomes significantly different as the streamwise pressure gradient changes.
Starting Page	471
Ending Page	478
Page Count	8
File Format	PDF
ISSN	00218944
Journal	Journal of Applied Mechanics and Technical Physics
Volume Number	56
Issue Number	3
e-ISSN	15738620
Language	English
Publisher	Pleiades Publishing
Publisher Date	2015-08-25
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	separated flow turbulent heat transfer diffuser pressure gradient Mechanics Fluid- and Aerodynamics Classical Continuum Physics Applications of Mathematics Mathematical Modeling and Industrial Mathematics Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Condensed Matter Physics Mechanical Engineering

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