• 制导、导航与控制专栏 •

### 基于目标流量拟合的微型燃烧室流量分配设计方法

1. a.中国民航大学 适航学院, 天津 300300
b.中国民航大学 航空工程学院, 天津 300300
• 收稿日期:2020-05-25 出版日期:2020-09-28 发布日期:2020-10-10
• 通讯作者: 李奥特 E-mail:310509003@qq.com
• 作者简介:王伟(1977-), 男, 河南省许昌市人, 副教授, 研究方向为发动机的适航审定

### A Design Method for Flow Distribution in Micro-Combustor Based on Target Flow Fitting

WANG Weia, LI Aotea(), YU Junlib

1. a.College of Airworthiness,Civil Aviation University of China, Tianjin 300300, China
b.College of Aeronautical Engineering,Civil Aviation University of China, Tianjin 300300, China
• Received:2020-05-25 Online:2020-09-28 Published:2020-10-10
• Contact: LI Aote E-mail:310509003@qq.com

Abstract:

Adjusting the flow distribution of a combustor by changing the arrangement of jet holes is an important design method to improve the combustion performance of the combustor. Based on the geometrical model and initial simulation results of the micro-combustor in development, the flow-pressure mathematical model of the combustor was established, and a flow rate scaling fitting method was proposed to replace a lot of simulation by calculation, so as to reduce the costs of obtaining the local flow law of the hole. Furthermore, according to the flow-pressure mathematical model of combustor and the local flow law of hole, a jet hole arrangement scheme was designed to meet the requirements of target flow distribution. The results show that the relative error between the flow rate of each row of jet holes in the designed combustor and the target flow rate is reduced to less than 5% in only two times of the design calculation process by using this method, even if the flow rate distribution error of initial example is large. Compared with the traditional method, this method needs less data to summarize the local flow law of hole, and it takes into account the influence of the overall geometry of combustor on the transverse jet.