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对单边膨胀喷管(SERN)型面进行非线性缩短设计,采用CFD技术分析了非线性缩短SERN性能。与理想喷管、线性缩短理想喷管性能对比发现:非线性缩短理想喷管的推力性能优于直接线性缩短理想喷管;NPR较大范围内,较理想喷管推力性能下降很小,最好时不足0.04%。非线性缩短SERN设计方法应用于截短理想喷管并与RAO喷管推力性能对比发现:完全膨胀时推力性能较RAO喷管只低0.7%;严重过膨胀状态NPR=40时,推力性能较RAO喷管高15.6%。
The non-linear shortening design of the SERN profile was used to analyze the nonlinear shortening SERN performance using CFD technology. Compared with the ideal nozzle, the linear nozzle performance is shortened compared to the ideal nozzle found: non-linear shortening ideal nozzle thrust performance is better than direct linear shortened ideal nozzle; NPR larger range, the ideal nozzle thrust performance decreased very small, the best Less than 0.04%. Non-linear shortening The SERN design method was applied to truncate the ideal nozzle and compared with the thrust performance of the RAO nozzle. The results show that the thrust performance is only 0.7% lower than that of the RAO nozzle when it is fully expanded and the thrust performance is worse than that of RAO Nozzle height 15.6%.