本文選題：通風(fēng)制動盤　切入點：對流散熱　出處：《汽車工程》2016年11期

【摘要】：為提高通風(fēng)制動盤的散熱能力,對其內(nèi)部通道形式進(jìn)行了優(yōu)化。根據(jù)正交試驗設(shè)計提出16種通道布置方案,利用CFD方法計算各方案的內(nèi)壁散熱功率。通過方差分析確定各因素影響通風(fēng)盤散熱的顯著性水平。忽略非顯著性因素后,利用非線性回歸方法建立了以通道數(shù)量、入口角度和散熱肋截面特征為自變量的制動盤內(nèi)壁散熱功率計算模型。采用遺傳算法尋求該模型的最優(yōu)解,得到最優(yōu)通道形式為80條通風(fēng)道、通道入口與出口角度均為20°和4號散熱肋。CFD計算結(jié)果表明,該最優(yōu)通道結(jié)構(gòu)內(nèi)壁散熱功率為10.465k W,比正交表中各方案的最低散熱功率高1倍,比表中最高散熱功率高1.62%,說明優(yōu)化后得到的通風(fēng)道結(jié)構(gòu)能有效提高制動盤的散熱能力。
[Abstract]:In order to improve the heat dissipation capacity of the ventilated brake disc, the internal channel form was optimized.According to the orthogonal experimental design, 16 channel layout schemes are proposed, and the inner wall heat dissipation power of each scheme is calculated by CFD method.Variance analysis was used to determine the significant level of each factor affecting the heat dissipation of the ventilation plate.After ignoring the non-significant factors, a model for calculating the heat dissipation power of the inner wall of the brake disc is established with the independent variables of the number of channels, the inlet angle and the characteristics of the section of the heat dissipation rib by using the nonlinear regression method.The genetic algorithm is used to find the optimal solution of the model. The optimal channel form is 80 ventilation channels. The calculation results show that the channel inlet and outlet angles are both 20 擄and 4 # radiating rib. CFD calculation results show that,The heat dissipation power of the inner wall of the optimal channel structure is 10.465kW, which is 1 times higher than the lowest heat dissipation power of each scheme in the orthogonal table and 1.62k higher than that of the maximum heat dissipation power in the table. It shows that the optimized ventilation channel structure can effectively improve the heat dissipation capacity of the brake disc.
【作者單位】： 北京航空航天大學(xué)交通科學(xué)與工程學(xué)院;東風(fēng)汽車公司技術(shù)中心;
【基金】：國家自然科學(xué)基金(51405011) 北京市自然科學(xué)基金(3142013)資助
【分類號】：U463.51
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本文編號：1730561