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An Analytical Study for Critical Mass Flowrate of Compressed Water  

김희동 (안동대학교 기계공학부)
김재형 (안동대학교 기계공학부)
한민교 (㈜쌍용자동차)
박경암 (한국표준과학연구원)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.7, no.1, 2003 , pp. 57-65 More about this Journal
Abstract
As a compressed water is rapidly expanded through a nozzle, two-phase flow of vapor and liquid is formed in the nozzle due to the flash evaporation. In the present study, critical flow of two-phase fluids is analysized using an Isentropic-Homogeneous-Equilibrium model and a Leung model. Calculation results show that the choke of the two-phase flow can be two different types of continuous and discontinuous chokings. For the stagnation pressure below 10 Mpa it is found that the continuous choking, which is similar to the choking phenomenon of single-phase gas flow, is possible only when the degree of subcooling is less than 10K.
Keywords
Compressed water; Two-phase flow; Flaching; Choke; Degree of subcooling;
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