Experiment on evaporation efficiency of vaporizer and numerical simulation of two-phase flow in vaporizer

Affiliation of Author(s):能源与动力学院

Journal:Hangkong Dongli Xuebao

Abstract:To study the atomization and evaporation charactertistics of rear intake vaporizer, the experiment researched the influences of intake temperature, air fuel ratio (AFR), wall temperature and inlet air velocity on evaporation efficiency. Result of the experiment showed that intake temperature and inlet air velocity were two major factors influencing evaporation efficiency; when AFR decreased to 3.0, the flow pattern transformed from film boiling to transition boiling, now heat efficiency was the lowest. Discrete phase model (DPM) and droplet splashing model were employed to simulate the two-phase flow in the vaporizer. Calculation of evaporation efficiency was in reasonable agreement with experimental data. The numerical results show that the increase of inlet air velocity can improve the atomization quality, but it is not conducive to the uniformity of droplet distribution. Sauter mean diameters(SMD) is proportional to the -1.69 power of inlet air velocity. © 2018, Editorial Department of Journal of Aerospace Power. All right reserved.

ISSN No.:1000-8055

Translation or Not:no

Date of Publication:2018-12-01

Co-author:Li, Chao,Pan, Xinfeng

Correspondence Author:lyb

Date of Publication:2018-12-01