基于聚合物发泡过程参数模拟的冰箱门体成型层分析

doi:10.11949/0438-1157.20200056

摘要/Abstract

摘要：

针对制冷类产品中隔热发泡层结构的设计问题，分析聚合物发泡过程的物理特性，提出了基于发泡过程参数演化的发泡层结构仿真模型，用于指导相关冰箱门体结构优化设计。结合聚合物发泡工艺的理论过程分析，提取并分析发泡层结构相关联的物理参数演化规律，提出其相应函数表达。通过文献调研及发泡工艺实际模拟实验，分别获取其相关物理参数的统计数据及实际表达，并基于CFD-UDF构建了发泡过程仿真模型，用于冰箱门体结构模拟分析。最后，结合某款冰箱门体结构，分析其发泡层成型状态及过程参数，验证了该发泡过程CFD-UDF仿真模型的有效性。

关键词: 发泡过程, 物理参数模拟, CFD仿真, 门体结构

Abstract:

Since the thermal insulation structure with foam layer is one issue in current refrigerator production, the physical parameters in polymer foaming process are studied, and the simulation method of foam layer based on changing these physical parameters is proposed to optimize the structural design of refrigerator doors. Informed by theoretical analysis of polymer foaming process, these physical parameters related to foaming layer structure is discussed, and their changing and expression is analyzed. Based on the statistical data from literature and the polymer foaming experiments, the simulation model of foaming process with CFD-UDF is established, to analyze the refrigerator door structure. At last, one refrigerator door is proposed as the instance to discuss its physical parameters and foam layer structure, and to validate this CFD-UDF model.

Key words: foaming process, physical parameter simulation, CFD simulation, door structure

中图分类号:

TQ 328

柯庆镝, 杨杰, 李乾坤, 田亚明. 基于聚合物发泡过程参数模拟的冰箱门体成型层分析[J]. 化工学报, 2020, 71(S2): 273-280.

Qingdi KE, Jie YANG, Qiankun LI, Yaming TIAN. Structure analysis for refrigerator molding layer door based on polymer foaming simulation[J]. CIESC Journal, 2020, 71(S2): 273-280.

图/表 14

参考文献 30

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组分	质量分数/%
多元醇（HO-R′-OH）	30~45
催化剂	3~4
物理发泡剂	15
水（H₂O）	1~2
异氰酸酯（OCN-R-NCO）	40~60
其他必要成分	2~4

组分	质量分数/%
多元醇（HO-R′-OH）	30~45
催化剂	3~4
物理发泡剂	15
水（H₂O）	1~2
异氰酸酯（OCN-R-NCO）	40~60
其他必要成分	2~4

反应时间/s	H_min/cm	H_max/cm	H_t/cm	V_实验/cm3	V_仿真/cm3	误差/%	密度/ (kg/m³)
4.0	1.70	1.70	1.70	534.056	555.61	4.04	926.87
8.0	3.50	3.50	3.50	1099.53	1015.93	7.61	450.19
12.0	5.40	5.40	5.40	1696.41	1728.14	1.87	291.79
16.0	7.60	7.80	7.70	2418.96	2620.24	8.32	204.63
20.0	11.10	11.40	11.25	3534.19	3602.71	1.95	140.06
24.0	15.70	16.60	16.15	5073.52	4782.62	5.75	97.57
28.0	20.90	21.70	21.30	6691.40	6451.81	3.60	73.98
32.0	26.50	27.40	26.95	8466.34	8878.54	4.88	58.47
36.0	33.20	35.50	34.35	10791.05	11757.58	8.94	45.87
40.0	37.40	39.70	38.55	12110.48	13301.12	9.84	40.87
44.0	40.10	43.70	41.90	13162.89	14108.11	7.29	37.61

反应时间/s	H_min/cm	H_max/cm	H_t/cm	V_实验/cm3	V_仿真/cm3	误差/%	密度/ (kg/m³)
4.0	1.70	1.70	1.70	534.056	555.61	4.04	926.87
8.0	3.50	3.50	3.50	1099.53	1015.93	7.61	450.19
12.0	5.40	5.40	5.40	1696.41	1728.14	1.87	291.79
16.0	7.60	7.80	7.70	2418.96	2620.24	8.32	204.63
20.0	11.10	11.40	11.25	3534.19	3602.71	1.95	140.06
24.0	15.70	16.60	16.15	5073.52	4782.62	5.75	97.57
28.0	20.90	21.70	21.30	6691.40	6451.81	3.60	73.98
32.0	26.50	27.40	26.95	8466.34	8878.54	4.88	58.47
36.0	33.20	35.50	34.35	10791.05	11757.58	8.94	45.87
40.0	37.40	39.70	38.55	12110.48	13301.12	9.84	40.87
44.0	40.10	43.70	41.90	13162.89	14108.11	7.29	37.61

设置内容	参数
模型尺寸（圆柱体）	直径D=0.2 m,高H=1 m
流体域	整个圆柱体
网格划分软件	Fluent Meshing
网格尺度	10~15 mm
网格类型	多面体-六面体核心
网格质量	0.3972
总网格数	31769个
模拟方法	瞬态
出口边界设置	圆柱体上表面
多相流模型	VOF模型
初相	空气
次相	PU泡沫
初相设定	Fluent材料库
次相设定	自定义函数（UDF）设定
湍流模型	标准k-ε方程模型
壁面函数	标准壁面函数
出口边界条件	压力出口边界条件
速度和压力耦合求解算法	PISO算法
初始条件	大气条件