Experimental and numerical study on coupling effect of ducted fan in distributed electric propulsion system

被引：0
|
作者：
Zhou F. [1 ]
Wang Y. [1 ]
Wang S. [1 ]
Chen Y. [1 ]
Qiu Y. [2 ]
机构：
[1] School of Power and Energy, Northwestern Polytechnical University, Xi’an
[2] School of Aeronautics, Northwestern Polytechnical University, Xi’an
来源：
Tuijin Jishu/Journal of Propulsion Technology | / 45卷 / 03期
关键词：
Coupling effects; Distributed layout; Ducted fans; Failure of fan; Isolated layout;
D O I：
10.13675/j.cnki.tjjs.2208036
中图分类号：
学科分类号：
摘要：
Distributed electric propulsion system based on ducted fans has great application potential in aerodynamic performance，propulsion efficiency and robustness，but the complex coupling effect in the system lacks in depth study and understanding. In this paper，the coupling effect between propulsors in a distributed ducted fans system is studied by combining experiment with numerical simulation，and the law and mechanism of coupling interference between propulsors are analyzed，which provides theoretical basis for promoting the applica⁃ tion of aircrafts powered by distributed electric ducted fans in engineering. The results show that compared with the isolated layout of the fan，the inlet velocity distortion of the distributed layout affects the performance of the ducted fan，resulting in a thrust reduction of 4%. The coupling effect between the fans in the distributed layout is equivalent to the existence of a virtual and non-stick wall structure on both sides of the fan，which will induce two pairs of flow vortices on both sides of the fan. The coupling effect between the wing and the fan is that the vis⁃ cous wall structure of the wing induces the flow separation above the fan lip and a pair of flow vortices near the wing side. In the distributed layout，when the speed of the ducted fan decreases or the fan fails，it will only affect the performance of the adjacent fan. Due to the failure of the edge fan，only one adjacent fan takes up the flow up⁃ stream of the failed fan，and two adjacent fans are used to take up the flow in the middle fan. The influence of the edge fan failure on the flow is higher than that of the middle fan. © 2024 Journal of Propulsion Technology. All rights reserved.
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