ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Thermal characteristics of dual drive motors for high speed counter⁃rotating ducted fan
Received date: 2023-05-26
Revised date: 2023-06-12
Accepted date: 2023-07-17
Online published: 2023-07-28
Supported by
“Ye Qisun” Joint Foundation Project supported by the State Key Program of National Natural Science Foundation of China(U2141223)
This article proposes a dual-motor drive architecture for a counter-rotating ducted fan for high speed cruise， with the Fan-Fan-Motor-Motor （FFMM） layout design， where the counter-rotating fan is forward， and the drive motors behind the fans. The front and rear motors have different powers and sizes according to the aerodynamic requirements. The dual motor drive frame with the FFMM layout is installed in the center of the ducted fan， conducive to improving the aerodynamic performance of the counter-rotating fans. However， thermal coupling exists between the two motors in the same space and the accumulation of temperature in the space between the windings， making it difficult to judge the motor temperature rise during fan operation and the cooling effect based on the counter-rotating fan airflow. In this article， we first analyze the motor loss distribution characteristics of the dual motor drive architecture with the proposed FFMM layout under different operating conditions； then we explore the influence of thermal coupling between motors on the temperature rise of the front and rear motors， and optimize the thermal network model of the accumulated temperature cavity between the motors. To balance the temperature distribution of the front and rear motors in the center body and reduce the axial length of the centrosome structure， an annular heat conduction sheet structure for adjusting the thermal coupling degree between the two motors has been proposed， which can effectively improve the heat dissipation performance of the thermal cavity between the motors and optimize the temperature rise distribution of the front and rear motors. Finally， an experimental platform is built based on the high-speed counter rotating ducted fan， and electromagnetic and temperature rise experiments are completed. The experimental results are consistent with those of the simulation， indicating that the FFMM high-speed counter-rotating fan has a strong heat dissipation capacity under the direct air-cooling condition， and the annular heat conducting fins have a better cooling effect on the temperature distribution in the centrosome of the FFMM layout.
Weikang HUANG , Zhuoran ZHANG , Xingya DA , Peibo YUAN , Huamin GAO . Thermal characteristics of dual drive motors for high speed counter⁃rotating ducted fan[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2024 , 45(8) : 129048 -129048 . DOI: 10.7527/S1000-6893.2023.29048
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