不同挡板结构对油箱内油液晃动特性的数值分析

doi:10.13229/j.cnki.jdxbgxb20190925

Abstract

Abstract:

Under variable working conditions， the repeated oil liquid sloshing often results in sloshing noise， the interruption of oil liquid supply under the fast change of acceleration， the increase of evaporative emissions， and the structural damage of fuel tank and its inner parts. To optimize the suppression structure of oil liquid sloshing， the 3D finite element models of fuel tank filled with oil liquid are established， and the rationality of simulation parameters are verified. The accuracy of simulation results are verified by test. The influences of baffles with no holes， few holes and a large number of holes， high and low baffles and six different shapes of baffles on oil liquid sloshing are simulated by VOF method. The concept of time-area value is proposed on the basis of free oil liquid surface area. Comparing the parameters of oil liquid sloshing， it can be seen that the best structure is baffles with few holes and circular holes， which effectively reduces the pressure of oil liquid sloshing and time-area value. The corrugated and straight baffles have positive influence on suppressing the sloshing pressure of oil liquid at the center point and on the center line， respectively. The sloshing pressure of oil liquid is the greatest in fuel tank with eccentric arc baffles. The maximum and minimum time-area values of oil liquid are in fuel tank with multi-arc and corrugated baffles， respectively. The baffles obviously attenuate the change amplitude of free oil liquid surface area. The combined action of inertia force and gravity is beneficial to the decrease in time-area values.

Key words: vehicle engineering, automobile fuel tank, oil liquid sloshing, baffle structure, time-area value

CLC Number:

U464.136

En-hui ZHANG,Ren HE,Wei-dong SU. Numerical analysis of oil liquid sloshing characteristics in fuel tank with different baffle structures[J].Journal of Jilin University(Engineering and Technology Edition), 2021, 51(1): 83-95.

Figures/Tables 25

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References 14

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油液加速度	不同时间下的误差率/%					误差率最大值
油液加速度	0~0.99 s	1~1.99 s	2~2.99 s	3~3.99 s	4~5 s	误差率最大值
0.1g	4.82	4.05	2.98	2.64	2.34	4.82
0.2g	4.97	3.51	2.46	1.84	1.28	4.97
0.3g	4.81	3.67	2.68	2.06	1.35	4.81
0.4g	4.75	4.31	3.47	3.51	1.38	4.75

挡板中孔的类型	不同时间下中心点压力/Pa								最大压力值/Pa
挡板中孔的类型	1 s	2 s	3 s	4 s	5 s	6 s	7 s	8 s	最大压力值/Pa
无孔	205.31	205.31	205.56	205.73	199.48	199.41	199.47	199.48	205.73
少孔	171.97	164.25	164.18	164.51	181.11	179.88	179.69	179.65	181.11
多孔	160.03	162.13	162.65	162.46	189.36	190.28	189.92	188.92	190.28

挡板中孔的形状	不同时间下中心点压力/Pa								最大压力值/Pa
挡板中孔的形状	1 s	2 s	3 s	4 s	5 s	6 s	7 s	8 s	最大压力值/Pa
圆孔	171.97	164.25	164.18	164.51	181.11	179.88	179.69	179.65	181.11
椭圆孔	199.82	185.58	188.47	192.42	194.53	198.09	197.31	197.67	199.82

挡板尺寸	不同时间下中心点压力/Pa								最大压力值/Pa
挡板尺寸	1 s	2 s	3 s	4 s	5 s	6 s	7 s	8 s	最大压力值/Pa
高挡板	171.97	164.25	164.18	164.51	181.11	179.88	179.69	179.65	181.11
低挡板	181.48	173.19	177.79	178.77	191.63	187.75	187.45	187.69	191.63

时间/s	直线形挡板	圆弧形挡板	多段线形挡板	多圆弧形挡板	波纹形挡板	偏心圆弧形挡板
最大压力值	179.88	164.48	196.28	190.68	170.09	207.82
1	171.97	161.41	185.59	190.68	153.19	196.35
2	164.25	145.99	182.52	160.99	146.37	185.53
3	164.18	145.29	183.16	155.99	146.34	188.59
4	164.51	150.33	184.61	160.82	147.36	191.26
5	181.12	150.33	193.13	180.19	165.71	193.95
6	179.88	163.84	196.28	189.53	170.09	207.66
7	179.69	164.48	192.71	186.34	168.85	207.82
8	179.65	163.74	193.49	185.94	168.71	206.81

Numerical analysis of oil liquid sloshing characteristics in fuel tank with different baffle structures

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