涵道螺旋桨桨盘推力占总推力比值规律研究

doi:10.7527/S1000-6893.2024.30829

Abstract

Abstract:

The design of ducted propellers is much more challenging than that of isolated propellers， as the complexity of the interference between the duct and the propeller makes it difficult to determine the induced velocity at the propeller. In the present study， a momentum model of ducted propellers is established. Based on the model， the ratio of the propeller thrust to the total thrust of ducted propellers， denoted as k， is analyzed， and its relationship with the induced velocity at the propeller is obtained. Furthermore， the variation law of k in the hovering and forward flight states is revealed by numerical analysis based on Computational Fluid Dynamics （CFD） simulations. For a given duct configuration， the following variation law of k is found： in the hovering state， k hardly varies with the change of the propeller’s rotational speed； in the forward flight state， the k value and the thrust coefficient of the ducted propeller show a linear relationship. The linear relationship is independent of both the rotational speed and the incoming wind velocity， which is very beneficial for establishing an engineering model about the value of k. In addition， the uniform law of k values for ducted propellers with different number of blades is revealed. The present study enriches the theoretical understandings about ducted propellers and has potential values for application in the ducted propeller design.

Key words: ducted propeller, eVTOL, momentum theory, aerodynamics, thrust ratio

CLC Number:

V211

Xudong LI, Wei ZHONG, Zhen WANG, Tongguang WANG, Jinlong LI. Ratio of propeller thrust to total thrust of ducted propellers[J]. Acta Aeronautica et Astronautica Sinica, 2025, 46(4): 230829.

Figures/Tables 37

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References 30

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螺旋桨转速/（r·min^-1）	对应叶尖速度/（m·s^-1）
6 000	64.1
8 000	85.5
10 000	106.8
12 000	128.2
14 000	149.5
16 000	170.9

螺旋桨转速/（r·min^-1）	对应叶尖速度/（m·s^-1）
1 000	57.6
1 500	86.4
2 000	115.2
2 500	143.9
3 000	172.8

螺旋桨转速/（r·min^-1）	涵道推力/N	桨盘推力/N	总推力/N	k
6 000	1.54	2.94	4.48	0.655
8 000	2.85	5.44	8.29	0.654
10 000	4.51	8.52	13.03	0.654
12 000	6.42	12.11	18.53	0.654
14 000	8.86	16.65	25.51	0.653
16 000	11.51	21.62	33.13	0.653

螺旋桨转速/（r·min^-1）	涵道推力/N	桨盘推力/N	总推力/N	k
1 000	158.82	168.73	327.55	0.514
1 500	360.21	381.66	741.87	0.514
2 000	643.81	679.92	1 323.73	0.514
2 500	1 008.91	1 064.91	2 073.82	0.514
3 000	1 455.92	1 536.42	2 992.34	0.514

来流速度/（m·s^-1）	螺旋桨转速/（r·min^-1）
5，10，15，20，25	6 000
	8 000
	10 000
	12 000
	14 000
	16 000

Ratio of propeller thrust to total thrust of ducted propellers

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