基于代理模型的浮动壁式火焰筒壁温优化设计  

Approximate model-based optimum design for wall temperature of floatwall

作　　者：郭家良[1] 温卫东[1] 崔海涛[1] 高建辉[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《航空动力学报》2011年第3期588-592,共5页Journal of Aerospace Power

摘　　要：为了使得浮动壁结构具有更好的冷却效果,开展了浮动壁壁温优化研究;将代理模型技术与遗传算法相结合,并发展应用于某气动参数下的浮动壁式火焰筒壁温优化设计,使浮动壁的平均壁温降低了2.4%;同时根据构造所得的代理模型,对浮动壁壁温随几何参数的变化规律展开分析,研究了壁温随孔径和冲击间距的变化规律.分析结果表明,在选择的尺寸约束范围内和气动参数条件下,浮动壁结构的冷却效果随着气膜孔直径Dd的增大而变好,随着冲击孔直径Di的减小而变好,随着冲击间距H的减小而变好.In order to realize better cooling effect for the floatwall structure,optimization study about the floatwall＇s wall temperature was performed;approximate model and genetic algorithm were combined;and the optimization method was developed and applied to the floatwall＇s wall temperature optimum design under a certain aerodynamic parameter.The results show that,the average temperature of the floatwall decreases by 2.4%.At the same time,according to the approximate model constructed,this paper analyzed the wall temperature＇s changing rules of the geometric parameters,and gained the changing rules of the aperture and the pitch of impact.The results show that：under the size constraints and aerodynamic parameters selected in this article,the cooling effect gets better with the enlargement of the film hole diameter,or with the reduction of the impaction hole diameter and the reduction of the pitch of impact.

关 键 词：浮动壁 火焰筒 代理模型 遗传算法 优化设计 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]