Research on aerodynamic characteristics of driving platooning in wind and rain coupled environment

doi:10.3969/j.issn.1674-8484.2024.04.005

Abstract

Abstract:

In order to explore the aerodynamic load characteristics and flow field characteristics of the driving queue under wind and rain environment, this paper established a driving queue model under wind and rain coupling environment based on Euler-Lagrange method, considering the interaction between raindrops and air flow, and verified the accuracy of the model by comparing the test data. Then the effects of rainfall, lateral wind speed and vehicle spacing on the aerodynamic load characteristics and flow field characteristics of vehicles in the queue were studied. The results show that the force and torque on vehicles in the driving queue increase continuously with the increase of rainfall and lateral wind speed. When the rainfall is 50~250 mm/h, the resistance of the first vehicle in the queue increases from 27.21 to 28.49 N. When the lateral wind is 4.4~15.5 m/s, the lateral force of the first vehicle increases from 101 to 554.3 N. With the increase of queue spacing, the aerodynamic resistance of vehicles increases at first and then decreases, the lateral force and roll moment increase continuously, and the yaw moment decreases continuously. When the queue spacing is 0.25 to 0.75 times, the lateral force of the tail car (the fifth car) increases from 137.6 to 174.74 N, and the yaw moment decreases from 39.29 to 12.47 Nm.

Key words: aerodynamic load characteristic, wind and rain coupling, driving platooning, lateral wind speed, rainfall

CLC Number:

U461.1

XU Jianmin, YANG Wei, GONG Xiaoyan, WU Song, LI Luonan. Research on aerodynamic characteristics of driving platooning in wind and rain coupled environment[J]. Journal of Automotive Safety and Energy, 2024, 15(4): 492-502.

Figures/Tables 16

References 22

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	阻力因数	误差/ %
实验	0.508
220W网格	0.462	9.05
271W网格	0.4607	9.31
325W网格	0.4605	9.35

	阻力因数	误差/ %
实验	0.508
220W网格	0.462	9.05
271W网格	0.4607	9.31
325W网格	0.4605	9.35

队伍间距/倍	F_re/ N	F_lift/ N	F_side/ N	M_dir/ Nm	M_trans/ Nm	M_side/ Nm
0.25	29.46	107.18	137.61	42.67	39.29	-12.88
0.50	33.26	122.32	157.91	42.98	23.77	-15.69
0.75	31.41	121.34	174.74	41.25	12.47	-17.10
最大变化量	3.8	15.14	37.13	1.73	26.82	-4.22

队伍间距/倍	F_re/ N	F_lift/ N	F_side/ N	M_dir/ Nm	M_trans/ Nm	M_side/ Nm
0.25	29.46	107.18	137.61	42.67	39.29	-12.88
0.50	33.26	122.32	157.91	42.98	23.77	-15.69
0.75	31.41	121.34	174.74	41.25	12.47	-17.10
最大变化量	3.8	15.14	37.13	1.73	26.82	-4.22