基于流体动力学的热压罐框架式模具温度场优化

doi:10.3969/j.issn.1000-1093.2022.01.026

摘要/Abstract

摘要： 热压罐固化技术已经成为复合材料生产过程中重要的成型技术，在航空航天领域已被广泛应用。针对该技术在复合材料固化过程中存在温度分布不均匀导致材料内部结构不均匀的问题，基于流体流速对对流换热的影响，提出一种热压罐成型框架式模具温度场优化方法。该方法通过逐步减小工作流体流通面积，提高其流速，增强对流换热，利用流体流速的变化来补偿流体自身因热传递而损失的温度，从而达到改善模具型面温度分布的不均匀性，解决复合材料固化梯度较大的问题。利用多物理场仿真软件COMSOL对上凸型、直板型和下凹型变截面的模具进行流体与固体耦合计算，对比分析模具型面温度分布。结果表明，直板型框架式模具型面温度分布的均匀性最好，同时还具有改装成本低廉、结构简单、易于实现等特点。

关键词: 热压罐, 对流换热, 温度场, 结构优化

Abstract: Autoclave curing technology has become an important molding technology in the production process of composite materials, and has been widely used in the aerospace. The uneven temperature distribution in the composite material curing process used by this technology leads to the uneven internal structure of the material. For the problem above, a method for optimizing the temperature field of autoclave forming frame mold is proposed based on the influence of fluid flow rate on convection heat transfer. The proposed method is to reduce the circulation area of the working fluid, increase its flow rate, enhance convective heat transfer, and use the change of fluid flow rate to compensate for the temperature loss of the fluid itself due to heat transfer, so as to improve the inhomogeneity of the mold surface temperature distribution and solve the problem of large curing gradient of composite material. The COMSOL multiphysics simulation software is used to calculate the fluid-solid coupling of the “upward convex”, “straight” and “downward concave” variable cross-section molds. The temperature distribution of mold surface is analyzed. The results show that the profile of the “straight” frame-type mold has the best temperature distribution inhomogeneity, and it also has the characteristics of low conversion cost, simple structure, and easy implementation.

Key words: autoclave, convectionheattransfer, temperaturefield, structuraloptimization

中图分类号:

TF305

郭靖宇，岳光，吕佳镁，任琳，潘玉田. 基于流体动力学的热压罐框架式模具温度场优化[J]. 兵工学报, 2022, 43(1): 233-240.

GUO Jingyu, YUE Guang, L Jiamei, REN Lin, PAN Yutian. Optimization of Temperature Field of Autoclave Frame Mold Based on Fluid Dynamics[J]. Acta Armamentarii, 2022, 43(1): 233-240.

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