弯曲变截面隔离段参数化设计与优化

doi:10.13675/j.cnki.tjjs.190183

推进技术 ›› 2020, Vol. 41 ›› Issue (5): 1023-1030.DOI: 10.13675/j.cnki.tjjs.190183

弯曲变截面隔离段参数化设计与优化

陈镜帆¹，范晓樯¹，蒙泽威¹，熊冰¹，王翼¹

国防科技大学空天科学学院，湖南长沙 410073

发布日期:2021-08-15
作者简介:陈镜帆，硕士生，研究领域为高超声速推进技术。E-mail：chenjingfan97@foxmail.com
基金资助:
国家自然科学基金（11572347；11872071）。

Parameterization and Optimization for Variable Cross-Sections Bend Isolator

College of Aerospace Science, National University of Defense Technology, Changsha 410073, China

Published:2021-08-15

摘要/Abstract

摘要： 为了提高弯曲变截面隔离段的气动性能，发展了基于几何融合的参数化设计与优化方法。为了丰富几何融合方法产生构型的种类，提出了基于几何长度的新型离散化方法。为满足偏置要求及灵活性要求，中心线设计时选用了B样条曲线。利用优化软件Isight内置全局算法，针对某隔离段，以弯曲隔离段出口的总压恢复系数为目标进行了优化求解。结果表明：优化构型相对于原始构型，在给定相同来流入口情况下总压恢复系数提高了12.3%。

关键词: 超燃冲压发动机;隔离段;几何融合;气动性能;激波串;参数优化

Abstract: In order to improve aerodynamic performance of a specific variable cross-sections bend isolator, a parameterization and optimization method based on the shape blending function was developed. In order to increase the types of configuration generated by the shape blending function, a novel discretization memology based on geometric length was proposed. To meet the requirement of off-set and flexibility, B-spline curve was utilized for the off-set line design. Using the built-in global algorithm of the optimization software Isight, the total pressure recovery coefficient of the exit of a specific bend isolation section was targeted to optimize. It was found that the total pressure recovery coefficient of the optimized configuration was 12.3% higher than that of the original configuration given the same flow inlet condition.

Key words: Scramjet;Isolator;Shape blending;Aerodynamic performance;Shock train;Parameter optimization

陈镜帆，范晓樯，蒙泽威，熊冰，王翼. 弯曲变截面隔离段参数化设计与优化[J]. 推进技术, 2020, 41(5): 1023-1030.

CHEN Jing-fan¹, FAN Xiao-qiang¹, MENG Ze-wei¹, XIONG Bing¹, WANG Yi¹. Parameterization and Optimization for Variable Cross-Sections Bend Isolator[J]. Journal of Propulsion Technology, 2020, 41(5): 1023-1030.

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弯曲变截面隔离段参数化设计与优化

Parameterization and Optimization for Variable Cross-Sections Bend Isolator

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