崔金辉(1987-),男,山东潍坊人,工程师,主要研究方向:航空发动机总体性能设计,E-mail:cjh66hero@163.com。 |
收稿日期: 2024-05-25
网络出版日期: 2025-02-05
基金资助
中国航发集团自立项目(HFZL2018CXY021)
Influence of intake pressure loss on starting characteristics of core engine
Received date: 2024-05-25
Online published: 2025-02-05
为了研究进气损失对核心机起动性能的影响,开展了起动性能专项验证试车。采取在进气道前安装稳压系统的方式模拟进气损失的产生,并录取了核心机起动性能。为做对比,在不安装稳压系统的条件下,也录取了核心机起动性能。试验完成后得到了进气损失对起动性能参数的影响规律,并研究了稳压系统造成进气压力损失的原因及进气损失的计算方法。试验结果表明,进气压力损失降低了起动过程的转速上升率,对起动有不利影响。稳压系统不同组成部分产生流动损失的原因不同,针对不同组成部分可采用不同的优化方法来降低压力损失,如改善整流网和蜂窝器的粗糙度、合理选择扩压段的扩散角等。
崔金辉 , 闫雨嘉 , 袁红波 , 周玉昭 , 常少琢 . 进气损失对核心机起动性能的影响[J]. 沈阳航空航天大学学报, 2024 , 41(6) : 20 -26 . DOI: 10.3969/j.issn.2095-1248.2024.06.003
A specialized verification test for starting characteristics was carried out to investigate the influence of intake pressure loss on starting characteristics of core engine.A pressure stabilizing system was installed in front of the inlet to simulate the generation of intake pressure loss and the starting cha-racteristics of the core engine were recorded.For comparison,the starting characteristics of the core engine were also recorded without installing the pressure stabilizing system.After the experiment,the influence of intake pressure loss on starting characteristics was obtained,and the reasons for intake pre-ssure loss caused by the pressure stabilizing system,along with the calculation method for intake pre-ssure loss were studied.The results show that intake pressure loss reduces the speed rising ratio during the starting process,hurting the starting.The reasons for flow loss in different components of the pre-ssure stabilizing system are different,and various optimization methods for the different components can be used to reduce the pressure loss,such as improving the roughness of the rectifier network and the honeycomb,as well as selecting the diffusion angle of the diffuser section reasonably.
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