Effects of Precooler on Aerodynamic Performance of Hypersonic Axisymmetric Inlet at Design Condition

被引：0
|
作者：
Li C. [1 ,2 ]
Zhang Y. [1 ]
Tan H.-J. [1 ]
Wang J.-J. [1 ,3 ]
Xue H.-C. [1 ]
Zhang H.-T. [1 ]
机构：
[1] College of Energy and Power, Nanjing University of Aeronautics and Astronautics, Nanjing
[2] Jinan Key Laboratory of Advanced Gas-Turbine, Jinan Institute of Advanced Gas-Turbine, Jinan
[3] Science and Technology on Altitude Simulation Laboratory, AECC Sichuan Gas Turbine Establishment, Mianyang
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2023年 / 44卷 / 10期
关键词：
Axisymmetric inlet; Flow field structure; Hypersonic; Numerical simulation; Pre-cooler;
D O I：
10.13675/j.cnki.tjjs.2203001
中图分类号：
学科分类号：
摘要：
In order to obtain the influence mechanism and law of the precooler on the internal flow characteristics of the hypersonic inlet，a hypersonic axisymmetric inlet with a stepped precooler is designed in the expansion section，and a simulation model was established by using a hybrid grid，further，the numerical simulation results of the inlet with precooler and the prototype inlet in the throttling states under the condition of Ma6.0 free flow are obtained. The results show that after the introduction of the precooler，the critical back pressure capability of the inlet decreases slightly. And when 1.0≤pb/p0<150，the performance parameters of the inlet outlet decrease significantly. There is always throttling at the upstream of the precooler，and the throttling state at the upstream is determined by the blockage of the precooler and the back pressure at the outlet. When pb/p0≤20，the upstream flow field structure is completely determined by the blockage of the precooler，and when pb/p0>20，it is determined by both. When 20≤pb/p0<275，the precooler has a negative effect on upstream flow field，and when 20≤pb/p0<200，the introduction of precooler can effectively improve the quality of downstream flow field. Through the coupling effect of upstream and downstream，the outlet performance parameters tend to be consistent with the prototype inlet when pb/p0≥150. When pb/p0≥275，the suction of the low energy flow at the root of the shock train by the bleeding slot on the side of the lip makes the precooler almost have no influence on the upstream. © 2023 Journal of Propulsion Technology. All rights reserved.
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