Analysis of Effects of Mode Transition Type on Performance of Mode Transition for 3D Inward-Turning Combined Inlet

被引：0
|
作者：
Hu Z.-C. [1 ]
Cai Z.-J. [1 ]
Wang T.-Y. [1 ]
Zhu C.-X. [1 ]
Wu L.-N. [1 ]
You Y.-C. [1 ]
机构：
[1] School of Aerospace Engineering, Xiamen University, Xiamen
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2020年 / 41卷 / 12期
关键词：
Inward-turning inlet; Mode transition; Numerical simulation; Performance analysis; Turbine based combined cycle;
D O I：
10.13675/j.cnki.tjjs.190875
中图分类号：
学科分类号：
摘要：
In order to satisfy the working requirement of Xiamen Turbine Ejector Ramjet (XTER) combined cycle engine, a three-dimensional inward-turning quadir-ducts combined inlet with three modes (i.e., turbojet, ejector and ramjet modes) and working speed range at Ma∞=0.0~6.0 was designed in this work. The flow and performance of the combined inlet in mode transition process from the ejector mode to the ramjet mode are analyzed numerically, considering both fixed Mach number mode transition (Ma∞=4.0) and interval Mach number mode transition (Ma∞=3.0~4.0). The results show that the inlet works properly and the captured mass flow rate of the inlet transits smoothly from the ejector duct to the ramjet duct for both types of mode transition. At fixed Mach number mode transition, the total mass flow rate coefficient of the inlet decreases from 0.92 to 0.91 due to the adjustment of the splitters, and the Mach number at throat reduces from 2.47 to 1.99. The total pressure recovery coefficient at the exit of the ejector duct decreases from 0.28 to 0.13 with closing of the splitters, while the total pressure recovery coefficient at the exit of the ramjet duct rises from 0.27 to 0.48. At interval Mach number mode transition, the total mass flow rate coefficient of the inlet rises from 0.89 to 0.91, and the Mach number at throat increases from 1.63 to 1.99. The total pressure recovery coefficient of the ejector duct decreases from 0.60 to 0.13, while the total pressure recovery coefficient of the ramjet duct decreases from 0.55 to 0.48. In general, the anti-back pressure capability of the ramjet duct is gradually enhanced during both types of mode transition processes, but considering both the flow feature and the performance of each duct, selecting the interval Mach number mode transition can efficiently improve the aerodynamic performance of the combined inlet. © 2020, Editorial Department of Journal of Propulsion Technology. All right reserved.
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页码：2670 / 2680
页数：10
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