新型气驱动涵道风扇推进系统加速控制计划研究
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南京航空航天大学能源与动力学院,南京 210016

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通讯作者:

黄向华,女,教授,E-mail: xhhuang@nuaa.edu.cn。

中图分类号:

V233.7

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Acceleration Schedule of Air-Driving Ducted Fan Propulsion System
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College of Energy and Power Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China

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    摘要:

    气驱动涵道风扇推进系统是一种新型垂直起降动力系统,由涡扇发动机与气驱动升力风扇组成。气驱动涵道升力风扇由涡扇外涵引气驱动,实现高效增推。当前加减速控制计划未考虑到双轴加速过程中的协同加速问题,用于设计气驱动涵道风扇加速控制计划时,将导致气驱涵道风扇加速过程出现推力波动。为了实现气驱动涵道风扇与涡扇发动机双轴协同加速,提出了一种基于变量替换模型的分阶段加速过程控制计划设计方法。首先在气驱动涵道风扇推进系统仿真模型基础上建立了3种不同形式的变量替换模型,根据加速过程推进系统受到的不同状态约束分阶段开展加速控制计划设计,将控制量与状态因子置换,在每个阶段采用不同变量替换模型逆向求解控制量,得到加速过程控制计划。仿真结果表明,该方案设计的涵道风扇加速控制计划与传统变量替换法相比,实现了双转子协同加速共同达到目标转速,推力超调量降低了3.3%,调节时间缩短了1.7 s,同时避免了推力波动现象。

    Abstract:

    The air-driving ducted fan propulsion system is a new design for vertical takeoff and landing power systems which consists of a turbofan engine and an air-driving ducted fan. The air-driving ducted fan is driven by the air intake of the turbofan’s bypass, thus achieving efficient lift enhancement. The previous study on transition control schedule cannot project the dual-axis acceleration process. When designing an acceleration control plan for air-driving ducted fan, it results in thrust fluctuations during the acceleration process of the air-driving ducted fan. In order to achieve dual-axis coordinated acceleration between the air-driving ducted fan and the turbofan, a relatively universal acceleration process control plan design method is proposed. Firstly, three different forms of variable substitution models are established based on the systematic simulation model of air driven ducted fan propulsion. Variable substitution models can solve the control variables in reverse according to the given state variables. A phased acceleration control plan design process based on different state constraints is proposed. According to the different state constraints experienced by the acceleration process propulsion system, the control variables are solved in reverse using a variable substitution model to obtain the acceleration process control plan. The simulation results show that compared with the traditional variable replacement method, the designed ducted fan acceleration control plan achieves dual rotor coordinated acceleration to reach the target speed, reduces thrust overshoot by 3.3%, shortens adjustment time by 1.7 s, and avoids thrust fluctuations.

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雷钧皓,黄向华.新型气驱动涵道风扇推进系统加速控制计划研究[J].南京航空航天大学学报,2025,57(4):658-669

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  • 收稿日期:2024-09-20
  • 最后修改日期:2024-12-08
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  • 在线发布日期: 2025-09-02
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