Abonnement à la biblothèque: Guest
Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections
Heat Transfer Research
Facteur d'impact: 0.404 Facteur d'impact sur 5 ans: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimer: 1064-2285
ISSN En ligne: 2162-6561

Volumes:
Volume 50, 2019 Volume 49, 2018 Volume 48, 2017 Volume 47, 2016 Volume 46, 2015 Volume 45, 2014 Volume 44, 2013 Volume 43, 2012 Volume 42, 2011 Volume 41, 2010 Volume 40, 2009 Volume 39, 2008 Volume 38, 2007 Volume 37, 2006 Volume 36, 2005 Volume 35, 2004 Volume 34, 2003 Volume 33, 2002 Volume 32, 2001 Volume 31, 2000 Volume 30, 1999 Volume 29, 1998 Volume 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2018021519
pages 1559-1585

TURBULENT DECAYING SWIRLING FLOW IN A PIPE

V. Aghakashi
Center of Excellence in Energy Conversion (CEEC), School of Mechanical Engineering, Sharif University of Technology, Tehran, 11155-9567, Iran
Mohammad Hassan Saidi
Center of Excellence in Energy Conversion (CEEC), School of Mechanical Engineering, Sharif University of Technology, P.O. Box 11155-9567, Tehran, Iran

RÉSUMÉ

In this work, a solution is applied to investigate the heat transfer characteristics in a pipe with turbulent decaying swirling flow by using the boundary layer integral scheme. The governing equation is solved using the forth-order Runge-Kutta scheme resulting in thermal boundary-layer thickness and dimensionless heat transfer coefficient, namely, the Nusselt number. Both forced- and free-vortex profiles are considered for the tangential velocity component. A comparison of the results obtained for the Nusselt number with available experimental data shows that this scheme has good capability in predicting the heat transfer parameters of swirling flow especially in the entrance region of a pipe. The results of the present work specify that in swirling flow, the forced-vortex velocity profile is more accurate in predicting the heat transfer coefficient as compared with the free-vortex one. Also, the effects of the inlet Reynolds number, inlet swirl intensity, and of the Prandtl number on the thermal boundary-layer thickness and Nusselt number are studied, and it is realized that the variation of these two parameters depends on the inlet Reynolds number, inlet swirl intensity, and the Prandtl number. The results show that increasing the inlet swirl intensity has a strong increasing effect on the heat transfer rate.


Articles with similar content:

Forced convection
NUMERICAL SIMULATION OF TRANSIENT COOLING EFFECT WITH WALL MASS INJECTION BEHIND THE BACKSTEP

ICHMT DIGITAL LIBRARY ONLINE, Vol.11, 2004, issue
Yue-Tzu Yang, Kuo-Teng Tsai
SIMULTANEOUSLY DEVELOPING FLOW AND HEAT TRANSFER IN THE ENTRANCE REGION OF ELLIPTICAL DUCTS
International Heat Transfer Conference 8, Vol.3, 1986, issue
C. W. Rapley , R. Stainsby, A. I. C. Webb
INTEGRAL TRANSFORM SOLUTION FOR THE INTERNAL BOUNDARY LAYER OF NON-NEWTONIAN FLUIDS
Hybrid Methods in Engineering, Vol.1, 1999, issue 2
Joao N. N. Quaresma, Emanuel N. Macedo, R. N. O. Magno
TRANSPORT PROCESSES OF HEAT AND MOMENTUM IN THE WALL REGION OF TURBULENT PIPE FLOW
International Heat Transfer Conference 8, Vol.3, 1986, issue
Mikio Hishida, Yasutaka Nagano, Masato Tagawa
TURBULENT HEAT TRANSFER TO THE FLOW IN A CONCENTRIC ANNULUS WITH A ROTATING INNER CYLINDER
International Heat Transfer Conference 8, Vol.3, 1986, issue
Sh. Hirai, Toshimi Takagi, T. Higashiya, K. Tanaka