Optimum design method oriented thrust for over-under TBCC combined nozzle

被引：0

作者：

Miao J. ^{[1
]}

Cai Y. ^{[1
]}

Wang D. ^{[1
]}

Yin C. ^{[1
]}

Li X. ^{[1
]}

Xu Q. ^{[2
]}

机构：

[1] Yangzhou Collaborative Innovation Research Institute Company, Limited, Shenyang Aircraft Design and Research Institute, Aviation Industry Corporation of China，Limited, Jiangsu, Yangzhou

[2] Science and Technology on Altitude Simulation Laboratory, Sichuan Gas Turbine Establishment, Aero Engine Corporation of China, Sichuan, Mianyang

来源：

Hangkong Dongli Xuebao/Journal of Aerospace Power | 2023年 / 38卷 / 06期

关键词：

aerodynamic characteristics; combined nozzle; design method; flow-field distribution; over-under TBCC engine; thrust optimization;

D O I：

10.13224/j.cnki.jasp.20220883

中图分类号：

学科分类号：

摘要：

Considering the requirements on integration of aircraft/engines，a design method of over-under turbine based combined cycle engine (TBCC) nozzle oriented thrust optimization under a given geometric constraint was proposed. The optimal allocation of the area expansion ratio of the turbo-engine/ramjet nozzle at under-expansion and over-expansion state was realized by means of theoretical analysis and numerical simulation. Within the range of turbo-engine/ramjet pressure-drop-ratio，the TBCC nozzle designed for thrust optimization can achieve higher thrust performance than the baseline nozzle，and the difference in composite thrust coefficient was particularly obvious under the over-expansion state，where the thrust coefficients at Mach number of 0.2 and 3 can be increased by 4.89% and 4.14%，respectively， through thrust optimization. Furthermore， the lift force and pitching moment of thrust optimization nozzle changing with the Mach number were 33% and 47.3% smaller than those of the baseline nozzle，which can effectively reduce the range of aerodynamic focus of the whole aircraft，helping to reduce the trim resistance of wide-speed-range aircraft and the difficulty of flight control. © 2023 BUAA Press. All rights reserved.

引用

页码：1367 / 1377

页数：10

共 19 条

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