年間 6 号発行
ISSN 印刷: 1940-2503
ISSN オンライン: 1940-2554
Indexed in
THE EFFECT OF HOMOGENEOUS NUCLEATION IN SUPERSONIC CONDENSING SUBMILLIMETER SCALED JETS
要約
A numerical work is reported of the effect of nonequilibrium homogeneous condensation in the underexpanded supersonic condensing jets issuing from the submillimeter scaled nozzles. Moist air as working gas is used to simulate the condensing jets. The classical nucleation rate and droplet growth equations are used to model the nonequilibrium nucleation phenomena. A TVD numerical method is applied to solve the time dependent Reynolds- and Favre-averaged Navier-Stokes equations that coupled the rate equation of liquid phase production. The influence of size of the nozzle exit diameter on the aerodynamic features of jets is investigated. The shock structure is investigated under different operating conditions−pressure ratios and initial relative humidities. Special attention is given to the effect of homogeneous condensation on the thermo-fluid dynamic features of the jets. The present computational model is validated through comparison of the predicted results with the experimental data.