Affiliation of Author(s):能源与动力学院
Journal:Tuijin Jishu
Abstract:In order to investigate the effects of lateral expansion on the performance of single expansion ramp nozzle, different laws of lateral expansion were given by using cubic parametric approach, and the corresponding three-dimensional asymmetric nozzle configurations with lateral expansion were designed based on the quasi two-dimensional method of characteristics (MOC). Combined with CFD results, the effects of straight sidewalls and curved sidewalls on the performance of nozzle were further investigated. In order to verify the reliability of numerical simulation method, a cold flow wind tunnel experiment of the nozzle with 10° straight sidewalls was carried out. The results of the simulation are in good agreement with experiment data. The results show that, in the given design conditions, the nozzle with 6° straight sidewalls has optimal performance, and the nozzle's length can be shortened by 34.05%. Lateral expansion can not only guarantee the performance of nozzle, but also be of great significance to shorten the length of nozzle and reduce its weight. For curved-sidewall nozzles, the trend of the thrust produced by sidewall is consistent with the thrust produced by the whole nozzle configuration. "Convex curve" is more helpful to improve the thrust performance of nozzle because of the larger initial expansion angle. © 2017, Editorial Department of Journal of Propulsion Technology. All right reserved.
ISSN No.:1001-4055
Translation or Not:no
Date of Publication:2017-03-01
Co-author:牛彦沣,莫建伟
Correspondence Author:牛彦沣,Xu Jinglei