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Paper Information

Journal:   JOURNAL OF SCHOOL OF ENGINEERING   2003 , Volume 15 , Number 2; Page(s) 187 To 205.
 
Paper: 

AN EXPERIMENTAL INVESTIGATION AND THEORETICAL MODELING OF VAPOR CONDENSATION JUMP IN A SUPERSONIC NOZZLE BASED ON EXACT DROPLET GROWTH EQUATIONS

 
 
Author(s):  MAHPEYKAR M.R., TEYMOURTASH A.R.
 
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Abstract: 

This paper describes a theoretical study of the self-condensation of non-equilibrium wet steam during supersonic expansion in the Laval nozzle. The nucleation theory and exact droplet growth equations have been combined with equations of one-dimensional gas dynamics and the system integrated numerically on a computer. It has been shown that self-condensation of vapour in the divergent part of nozzle causes a jump in the flow. In order to determine the ability of this method to predict the condensation zone, a steady solution is obtained for a nozzle under supersonic flow condition and compaired with measurements. The work will be extended to predict the location of condensation jump in steam turbines.

 
Keyword(s): CONDENSATION SHOCK, CONDENSING FLOW, NUCLEATION, SUPERCOOLING DEGREE, CRITICAL RADIUS, SUPERSATURATION
 
References: 
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