预冷器对进气道流场结构与流动损失影响研究
Research on Flow Structure and Flow-loss Property of Inlet with Pre-cooler
李超 1张悦 1谭慧俊 1薛洪超 1张晗天 1王子运1
作者信息
- 1. 南京航空航天大学 能源与动力学院,江苏 南京 210016
- 折叠
摘要
为获取带预冷器进气道的流场结构和损失特性,本文设计了一种在扩张段加入台阶型预冷器的进气道,并采用混合网格对带预冷器进气道建立了仿真模型.对比分析了Ma 2.0自由来流条件下的带预冷器进气道与原型进气道在整体性能上的差异,并进一步对比研究了两种进气道的流场结构与损失特性.研究发现,进气道扩张段加入预冷器后抗反压能力下降,总压损失增加;带预冷器进气道没有典型的通流状态,在出口低反压时,预冷器上游已出现一定程度的节流,这主要是由预冷器的堵塞造成的,且这种堵塞效果在全工况下均存在;带预冷器进气道比原型进气道出口总压损失更高的主要原因是预冷器区域存在额外的总压损失,且随着出口反压的提高,流经预冷器而发生的总压损失逐渐减小.
Abstract
In order to obtain the flow structure and flow-loss characteristics of the pre-cooler inlet,an inlet is designed with a stepped pre-cooler in the expansion section,and a simulation model of the inlet with a pre-cooler is established by using a hybrid grid.The overall performance difference between the pre-cooler inlet and the prototype inlet under the condition of Ma 2.0 free flow is compared and analyzed,and the flow structure and flow-loss property of the two inlet are further compared.The study found that the anti-back pressure ability decreases and the total pressure loss increases when the per-cooler is added in the expansion section of the inlet.The inlet with the pre-cooler does not have a typical flow state.When the outlet is under low back pressure,the upstream of the pre-cooler has a certain degree of throttling,which is mainly caused by the blockage of the pre-cooler,and such blockage effect exists in all working condition.The main reason why the total pressure loss of the inlet with pre-cooler is higher than that of the prototype inlet is that there is additional total pressure loss in the pre-cooler area,and with the increase of the back pressure at the outlet,the total pressure loss through the pre-cooler decreases gradually.
关键词
预冷器/进气道/混合网格/流场结构/损失特性Key words
pre-cooler/inlet/hybrid grid/flow structure/loss characteristic引用本文复制引用
出版年
2024
NETL
NSTL
万方数据