空冷中冷器百叶窗翅片结构参数优化

doi:10.13229/j.cnki.jdxbgxb.20210797

Abstract

Abstract:

Based on the central composite design， the three geometric parameters of the air-cooled intercooler shutter fins， the opening angle， the fin spacing， and the louver spacing， are tested with three factors and five levels. Then a complete second-order regression model with the heat transfer characteristics Nu and the flow resistance characteristics f as the objective function is established， and the response surface analysis is carried out to analyze the importance of the influence of each structural parameter， and finally the optimization calculation is carried out according to the multi-objective genetic algorithm. The results show that the heat transfer characteristics are mainly affected by the fin spacing， while the resistance characteristics are most affected by the opening angle. Multi-objective optimization can obtain a set of Pareto solutions， which can be selected by the decision maker according to actual needs.

Key words: mechanical engineering, air-cooled charge air cooler, louver fin, central composite design, response surface method

CLC Number:

U461.8

Sheng LI,Jia ZHU,De-hui HUANG,Cun-fu CHEN,Hong-qing FEI,Wei FENG,Xing-jun HU. Structural parameters optimization of louver fins of air⁃cooled charge air cooler[J].Journal of Jilin University(Engineering and Technology Edition), 2023, 53(4): 998-1006.

Figures/Tables 13

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序号	网格数量	h/［W·m^-2·K^-1］	ΔP/Pa	偏差h/%	偏差ΔP/%
1	21 346 758	152.3	477.6	2.4	0.5
2	32 298 984	149.1	475.9	0.3	0.1
3	43 585 629	148.7	475.4	-	-

序号	因子	取值水平
序号	因子	-α	-1	0	1	+α
1	开窗角度φ/（°）	10	12.5	15	17.5	20
2	翅片间距P_LF /mm	2	2.25	2.5	2.75	3
3	百叶间距L_P /mm	2.5	2.75	3	3.25	3.5

序号	φ	P_LF	L_P	Nu	f
1	-α	0	0	8.296	0.176
2	-1	1	-1	8.936	0.177
3	-1	-1	-1	8.543	0.213
4	-1	-1	1	8.237	0.285
5	-1	1	1	9.396	0.224
6	0	0	0	8.843	0.279
7	0	0	0	8.834	0.280
8	0	0	0	8.836	0.280
9	0	0	0	8.828	0.280
10	0	0	0	8.950	0.279
11	0	0	0	8.836	0.280
12	0	+α	0	9.998	0.225
13	0	-α	0	7.736	0.389
14	0	0	+α	9.138	0.376
15	0	0	-α	8.671	0.204
16	1	-1	1	8.473	0.497
17	1	-1	-1	8.170	0.352
18	1	1	1	9.878	0.371
19	1	1	-1	9.432	0.264
20	+α	0	0	8.974	0.459

来源	自由度	Adj SS	Adj MS	F 值	P 值
合计	19	5.783 52
模型	7	5.672 02	0.810 29	87.21	0.000
线性	3	5.291 01	1.763 67	189.81	0.000
φ	1	0.301 53	0.301 53	32.45	0.000
P_LF	1	4.778 10	4.778 10	514.24	0.000
L_P	1	0.211 38	0.211 38	22.75	0.000
平方项	1	0.078 11	0.078 11	8.41	0.013
φφ*	1	0.078 11	0.078 11	8.41	0.013
交互项	3	0.302 90	0.100 97	10.87	0.001
φP_LF*	1	0.155 27	0.155 27	16.71	0.002
φL_P*	1	0.044 38	0.044 38	4.78	0.049
P_LFL_P*	1	0.103 25	0.103 25	11.11	0.006
误差	12	0.111 50	0.009 29
失拟	8	0.100 90	0.012 61	4.76	0.074
纯误差	4	0.010 59	0.002 65

来源	自由度	Adj SS	Adj MS	F 值	P 值
合计	19	0.147 184
模型	9	0.147 078	0.016 342	1536.69	0.000
线性	3	0.139 884	0.046 628	4384.56	0.000
φ	1	0.082 530	0.082 530	7760.54	0.000
P_LF	1	0.025 435	0.025 435	2391.74	0.000
L_P	1	0.031 919	0.031 919	3001.41	0.000
平方项	3	0.002 794	0.000 931	87.59	0.000
φφ*	1	0.002 209	0.002 209	207.68	0.000
P_LFP_LF*	1	0.001 132	0.001 132	106.42	0.000
L_PL_P*	1	0.000 155	0.000 155	14.58	0.003
交互项	3	0.004 400	0.001 467	137.91	0.000
φP_LF*	1	0.001 717	0.001 717	161.41	0.000
φL_P*	1	0.002 197	0.002 197	206.55	0.000
P_LFL_P*	1	0.000 487	0.000 487	45.77	0.000
误差	10	0.000 106	0.000 011
失拟	6	0.000 105	0.000 017	41.73	0.001
纯误差	4	0.000 002	0.000 000

Structural parameters optimization of louver fins of air⁃cooled charge air cooler

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