Accurate prediction method of flow coefficient for 2D curved surface variable inlet

被引：0
作者：
Li Y. [1 ]
Ma Y. [1 ]
Zhang K. [2 ]
机构：
[1] Xi'an Institute of Aerospace Propulsion, China Aerospace Science and Technology Corporation, Xi'an
[2] College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2019年 / 34卷 / 07期
关键词：
Accurate prediction; Combined cycle engine; Flow coefficient; Hypersonic inlet; Numerical simulation; Variable geometry;
D O I：
10.13224/j.cnki.jasp.2019.07.001
中图分类号：
学科分类号：
摘要：
In order to meet the flow requirements of Mach number range of modal translation (incoming Mach number 2.2-3.2) for the 2D curved surface variable inlet, in view of three adjustment schemes of cowl translation, rotation and translation + rotation, based on theoretical analysis and the flow field of the reference inlet, an accurate prediction method of flow coefficient was proposed, and verified by numerical calculation, and the overall performance was obtained. The results showed that their flow coefficients were exactly equal to the predicted values and did not require repeated trial-calculation, which met the design expectations and could be extended to the axisymmetric inlet. In relation to the reference inlet, the flow coefficient and compression efficiency increased simultaneously as the cowl moved forward. The total pressure recovery coefficient of the exit was equal and the pressure ratio was increased by 14.6% at incoming Mach number 2.5. Under the condition of reducing the same flow coefficient, the backward movement of the cowl made the pressure ratio and compression efficiency lower, the total pressure recovery coefficient of the exit was basically equal and the pressure ratio was reduced by 12.9% at incoming Mach number 2.5, while the rotation of the cowl further reduced the pressure ratio by 9.1%, and the performance of cowl back movement scheme was better. © 2019, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：1409 / 1415
页数：6
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