Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
Heat Transfer Research
Fator do impacto: 0.404 FI de cinco anos: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561

Volumes:
Volume 51, 2020 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.2017017850
pages 1545-1565

LARGE EDDY SIMULATION OF FLUID INJECTION UNDER TRANSCRITICAL CONDITIONS: EFFECTS OF PSEUDOBOILING

Wu Wei
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian City, P.R. China
Maozhao Xie
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian City, P.R. China
Ming Jia
School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China

RESUMO

Cryogenic nitrogen injected into a supercritical environment is numerically studied by large eddy simulation to explore the influence of pseudoboiling on the jet evolution and mixing process. For comparison, the same model is simulated in ideal-gas conditions with the same initial profiles of density and velocity. The results show that the turbulent kinetic energy and vorticity distributions in both cases are nearly the same indicating that the dominant eddies and the production and dissipation of the turbulent kinetic energy are not directly affected by the pseudoboiling phenomenon. Moreover, the axial velocity distributions in the two cases are also similar, revealing that the pseudoboiling has little effect on turbulent transport mechanisms. However, the density distribution is evidently influenced by the pseudoboiling. Because of the existing of pseudoboiling effects, the most thermal energy absorbed from the surroundings is spent to expand the jet volume, rather than to increase its temperature, so the transcritical fluid is entrained deeply along the axial and radial directions. As a result, before the pseudocritical temperature is reached, the mean profiles of axial and radial density distributions change more slowly in comparison with the ideal-gas condition. Consequently, the mass transport mechanism is considered to be influenced by the pseudoboiling under transcritical conditions.


Articles with similar content:

NUMERICAL INVESTIGATION OF THE INFLUENCE OF HIGH AMBIENT PRESSURES ON SUPERCRITICAL JETS AND MIXING PROCESS
Heat Transfer Research, Vol.50, 2019, issue 8
Maozhao Xie, Hongsheng Liu, Wu Wei, Liang Li, Ming Jia
NUMERICAL ANALYSIS OF STEEL SOLIDIFICATION AND PARTICLE ENTRAPMENT IN A CONTINUOUS BILLET CASTER
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2017, issue
Suryanaman Chaube, Varnita Bajpai
EFFECT OF A PASSIVE DISTURBANCE ON THE HEAT TRANSPORT IN THE NEAR FIELD OF A ROUND JET
International Heat Transfer Conference 13, Vol.0, 2006, issue
Lyazid Djenidi, Robert Anthony Antonia, P. Burattini
Turbulent Mixing of Subsonic Hot and Cold Air Jets
International Journal of Fluid Mechanics Research, Vol.42, 2015, issue 2
V. Ilangovan
DNS OF AEROSOL EVOLUTION IN A TURBULENT MIXING LAYER
TSFP DIGITAL LIBRARY ONLINE, Vol.8, 2013, issue
Kun Zhou, A. Alshaarawi, Fabrizio Bisetti, Antonio Attili