Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
Journal of Enhanced Heat Transfer
Fator do impacto: 1.406 FI de cinco anos: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Imprimir: 1065-5131
ISSN On-line: 1026-5511

Volumes:
Volume 27, 2020 Volume 26, 2019 Volume 25, 2018 Volume 24, 2017 Volume 23, 2016 Volume 22, 2015 Volume 21, 2014 Volume 20, 2013 Volume 19, 2012 Volume 18, 2011 Volume 17, 2010 Volume 16, 2009 Volume 15, 2008 Volume 14, 2007 Volume 13, 2006 Volume 12, 2005 Volume 11, 2004 Volume 10, 2003 Volume 9, 2002 Volume 8, 2001 Volume 7, 2000 Volume 6, 1999 Volume 5, 1998 Volume 4, 1997 Volume 3, 1996 Volume 2, 1995 Volume 1, 1994

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2011003265
pages 389-401

LOCAL HEAT TRANSFER OF JET IMPINGEMENT COOLING WITH FILM EXTRACTION FLOW IN A ROTATING CAVITY

Kai Wang
Key Laboratory of Molecular Virology & Immunology, Institut Pasteur of Shanghai, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200025, China
Guoqiang Xu
National Key Laboratory of Science and Technology on Aero-Engines, School of Jet Propulsion, Beihang University, Beijing, 100191, China; School of Energy Science and Engineering, Harbin institute of Technology, Harbin, 150001, China
Zhi Tao
National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics The Collaborative Innovation Center for Advanced Aero-Engine of China Beihang University Beijing 100191, China
Jining Sun
National Key Laboratory of Science and Technology on Aero-Engines, School of Jet Propulsion, Beihang University, Beijing, 100191, China
Hongwu Deng
National Key Laboratory of Science and Technology on Aero-Engines, School of Jet Propulsion, Beihang University, Beijing, 100191, China

RESUMO

An experimental investigation was carried out to examine the heat transfer characteristics on impingement cooling with extraction flow in a rotating cavity. Two H/d configurations of 3.0 and 6.0 were conducted. The Reynolds number based on the inlet velocity of the jet air and the diameter of the impingement hole was fixed at 2000. The test model rotated at five different speeds, 0, 200, 400, 600, and 800 rpm, in two reversal directions, respectively. The local heat transfer coefficient on the target surface was measured by a transient method with thermochromic liquid crystal. Experimental result reveals that the jet flow could be bent by the Coriolis force and consequently the heat transfer would be weakened by rotation. The heat transfer coefficient of H/d = 3 configuration is higher than that of H/d = 6 configuration for either stationary or rotational conditions. For the structure of H/d = 6.0, the stagnation point has an offset of 1.5d due to the bending of the jet flow. Compared to the stationary results, the maximum of the local heat transfer coefficient is reduced by 38.3% and the averaged heat transfer coefficient is reduced by 44.5% at 800 rpm. For the structure of H/d = 3.0, the offset of the stagnation point is small, but the spreading rate of the jet core is enhanced by rotation. Although not as strongly as the structure of H/d = 6.0, the heat transfer is still weakened by rotation. The maximum of local heat transfer coefficient is decreased 29.2% and average heat transfer coefficient is decreased 27.8% at 800 rpm compared to those at 0 rpm.


Articles with similar content:

THE IMPORTANCE OF NOZZLE LENGTH AND ISSUING PROFILE IN SUBMERGED IMPINGING JET HEAT TRANSFER
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2017, issue
Barak Kashi, Herman Haustein
EXPERIMENTAL INVESTIGATION OF ORTHOGONAL MULTI-JET AIR IMPINGEMENT ON COMBINED DIMPLE AND PIN-FIN HEAT SINK
Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017), Vol.0, 2017, issue
S. S. Vasekar, Sunil V. Dingare, Sandeep S. Kore
Heat transfer in inclined and direct impinging synthetic jets
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2012, issue
Udaysinh S. Bhapkar , Atul Srivastava, B. Puranik , Amit Agrawal
NUMERICAL STUDY OF JET IMPINGING ON A ROTATING CYLINDER WITH HEAT TRANSFER
Computational Thermal Sciences: An International Journal, Vol.8, 2016, issue 2
Bachir Imine, Mustapha Belkadi, Azzeddine Hammami
HEAT TRANSFER OF IMPINGING JET AT LOW REYNOLDS NUMBER
International Heat Transfer Conference 16, Vol.14, 2018, issue
Viktor I. Terekhov, Vladimir V. Terekhov, Vadim Lemanov