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所属单位：能源与动力学院
发表刊物：Tuijin Jishu
摘要：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号：1001-4055
是否译文：否
发表时间：2017-03-01
合写作者：牛彦沣,莫建伟
通讯作者：牛彦沣,徐惊雷