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High resolution computation of compressible condensing/evaporating moist-air flow for external and internal flows

Published online by Cambridge University Press:  27 January 2016

S. Hamidi  and
M. J. Kermani
S. Hamidi*
Affiliation:
Department of Mechanical and Aerospace Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
M. J. Kermani*
Affiliation:
Department of Mechanical Engineering, Amirkabir University of TechnologyTehran, Iran
*
sabaah_hamidi@yahoo.com
mkermani@aut.ac.ir
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Abstract

In this paper computation of high resolution, compressible condensing/evaporating moist-air flow for a series of two-dimensional internal and external flows is performed. It has been observed that the inflow wetness content can change the aerothermodynamics of the flow field, e.g. the shock angles. In the case of flow expansion through nozzles, it has also been observed that the content of wetness at nozzles exit in the case of moist-air is more than five times higher than that of pure steam under similar operating conditions. The reason is due to the internal flow of heat from steam portion toward air that accelerates the steam condensation rate. The solver is spatially third- and temporally second-order accurate. Validations of the numerical code are performed versus the experimental data of Moore et al (1973) in the case of very large humidity ratio, ω→∞ (pure steam). Also in the case of low humidity ratio, ω→0 (dry air), the exact solution of shock tube and wedge cases are used to validate our numerical results.

Type
Research Article
Information
The Aeronautical Journal , Volume 117 , Issue 1190 , April 2013 , pp. 427 - 444
Copyright
Copyright © Royal Aeronautical Society 2013 

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