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基于NSGA-Ⅱ算法的制动盘通道内回流区散热优化

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为提高通风式制动盘通道内回流区的对流散热性能,以通风式制动盘内部直叶片为研究对象,并基于遗传算法来进行结构优化.首先,采用最优拉丁超立方法进行数据采样,拟合响应面代理模型并验证代理模型的准确性;其次,在直叶片模型的基础上,选取3个结构参数:槽的宽度、槽的倾斜角度和叶片数量为优化变量,以质量流量和对流换热系数最大为目标,对制动盘内部进行优化设计,得到Pareto最优解;最后,比较优化前后两种制动盘通道内流体流动和散热效果.结果表明:优化后的槽叶片有效削弱了通道内的回流区域,使气流分布更加均匀;相较于直叶片制动盘,槽叶片制动盘的泵送质量流量能力提高了 12%,通道内散热率提高了 5.6%,总体散热高了 9%.
Heat-dissipation optimization of recirculation zone in brake disc passage based on NSGA-Ⅱ algorithm
In this article,in order to improve the convective heat-dissipation performance in the recirculation zone of the ventilated brake disc passage,efforts are made to focus on the internal straight vanes of the ventilated brake disc and carry out structural optimization based on the genetic algorithm.Firstly,the optimal Latin sampling method is used to sample the data,fit the response-surface model and verify whether the proxy model is accurate.Secondly,based on the model of the straight vanes,three structural parameters are selected as the optimization variables:the width of the slot,the inclination angle of the slot,and the number of the vanes,and the maximum mass flow rate and the maximum convective heat-transfer coefficient are used as the objectives,so as to optimize the internal design of the brake disc and work out the Pareto optimal solution.Finally,the fluid flow and the heat-dissipation effects in the two brake disc passages are compared before and after optimization.The results show that the optimized slotted vanes effectively weaken the recirculation zone in the passages,thus resulting in more uniform airflow distri-bution.Compared with the straight vane disc,the slotted vane disc has 12%higher pumped mass flow capacity,5.6%higher in-ternal heat-dissipation rate and 9%higher overall heat dissipation.

ventilated brake discslotted vanerecirculation zoneNSGA-Ⅱ algorithmheat-dissipation optimization

李杰、陈颖、陶龙

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北京建筑大学机电与车辆工程学院,北京 102627

通风制动盘 槽叶片 回流区 NSGA-Ⅱ 散热优化

2024

机械设计
中国机械工程学会,天津市机械工程学会,天津市机电工业科技信息研究所

机械设计

CSTPCD北大核心
影响因子:0.638
ISSN:1001-2354
年,卷(期):2024.41(2)
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