基于伴随法的空气系统引气管减阻优化设计  

Optimization of air bleed pipe in secondary air system based on adjoint method

作　　者：梁津华 赵维维 邹咪 马建栋 LIANG Jin-hua;ZHAO Wei-wei;ZOU Mi;MA Jian-dong(AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China)

机构地区：[1]中国航发四川燃气涡轮研究院,成都610500

出　　处：《燃气涡轮试验与研究》2022年第6期39-44,共6页Gas Turbine Experiment and Research

摘　　要：以空气系统引气管为研究对象,利用CFD和伴随法对管路进行优化,优化目标函数为管路的流动损失系数,管路造型通过网格变形实现。优化结果表明,引气管优化后总压损失系数降低47.83%,质量流量增加45.1%,熵增降低62.4%,流动变得更加平缓;引气管的主要损失源自气流速度和方向的急剧变化;尖锐的拐弯导致气流发生分离形成旋涡阻碍流动,平缓的拐弯更接近等熵流动,能够降低流动损失。The air bleed pipe of secondary air system was optimized with CFD and adjoint method.The objective function of optimization was total pressure loss coefficient,and the air bleed pipe modeling was achieved through mesh deformation.The optimized results show that the total pressure loss coefficient drops by 47.83%,mass flow rate increases by 45.1%and entropy increase lowers by 62.4%after optimization,and the flow becomes more gently.The main loss of air bleed pipe is caused by the rapid change of airflow speed and direction,the sharp bend results in flow separation,forming eddies that hinder flow;gentle turn is closer to isentropic flow,which can reduce flow loss.

关 键 词：航空发动机 空气系统 引气管 流动损失 伴随法 熵 优化 

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]