Design and study on scheme and performance matching of turboshaft-turbofan variable cycle engine

被引：0
|
作者：
Ren C. [1 ]
Jia L. [1 ]
Bu X. [2 ]
Chen Y. [1 ]
Yang J. [3 ]
机构：
[1] School of Power and Energy, Northwestern Polytechnical University, Xi’an
[2] Beijing Power Machinery Institute, Beijing
[3] Shijiazhuang Fourth Rest Center for Retired Military Cadres, Shijiazhuang
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2024年 / 45卷 / 05期
关键词：
Core drived fan system; Cycle analysis; Overall scheme; Rotor wing; Variable cycle engine; Vertical takeoff and landing aircraft;
D O I：
10.13675/j.cnki.tjjs.2212021
中图分类号：
学科分类号：
摘要：
A new concept of turboshaft-turbofan variable cycle engine（TSFVCE）is proposed for vertical takeoff and landing and high-speed cruise aircraft with a rotor wing，which can work in both turboshaft and turbo⁃ fan modes. Firstly，the structure and working mode of the TSFVCE are introduced，and the component perfor⁃ mance simulation model based on varying specific heat is established. Then，the schematic design of the engine performance is completed through the cycle analysis，which determined that the second bypass ratio is 3，the fan pressure ratio of the outer bypass is 1.98，and the first bypass ratio is 0.11. Finally，the influence of core drived fan system（CDFS）adjustable mechanism on engine performance is analyzed，and it is concluded that CDFS bleeder valve has a great influence on the thrust of engine in turbofan mode and the power in turboshaft mode. The maximum impact on the thrust of the turbofan mode is 61.5%，and the maximum impact on the power of the turbo⁃ shaft mode is 33.3%，which can be used to match the thrust and power output of the engine in the turbofan and turboshaft mode. © 2024 Journal of Propulsion Technology. All rights reserved.
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