Nonequilibrium Vapor Condensation in Shock Tube

Abstract

This paper is concerned with nonequilibrium condensation from a vapor to liquid phase on the plane endwall of a shock tube behind a reflected shock wave. The growth of a liquid film on the endwall is measured by an optical interferometer using a laser beam. Condensation coefficient of methanol vapor is determined in a wide range of thermodynamic nonequilibrium conditions of the vapor at the vapor-liquid interface. It is found that condensation coefficient is drastically influenced by the thermodynamic nonequilibrium conditions, it increases with the increase of interfacial vapor temperature and decreases with the increase of number density.