摘要
为改善某款多功能农机作业车的中冷器的散热性能和流动性能,对其内部气体流速、温度和压力分布情况进行CFD仿真研究。在台架试验验证其CFD仿真模型有效性的基础上,探究进气室内导流片的结构参数对中冷器性能的影响,运用Isight建立均匀性系数和导流片结构设计参数的Kriging近似模型,以均匀性系数最优为优化目标,用模拟退火算法对近似模型进行优化。结果表明,当导流角α为80°,结构参数L/L0为0.25时,气流分布的均匀性系数最优,中冷器的散热性能最佳。结构优化后的中冷器出口温度降低6.3℃,压力损失降低2.37kPa,提高发动机的动力性和排放性能。研究结果为今后中冷器气室的结构设计和参数优化提供有益参考。
In order to improve the heat dissipation and flow performance of multifunctional agricultural vehicle＇s intercooler, flow velocity, temperature and pressure distribution of inside air were studied by CFD simulation. Based on the verified CFD simulation mod- el, the effect of guide vane＇s structure parameters on intercooler＇s working performance was explored. Kriging approximate model a- bout uniformity coefficient and guide vane＇s structure parameters was built by using Isight, and optimizing the approximate model by using simulated annealing algorithm, taking uniformity coefficient as the optimization target. The results show that when diversion angle is 80°and structural parameter （L/L0） is 0.25, the optimal uniformity coefficient and heat dissipation can be achieved. After modification, the outlet temperature of intercooler reduces by 6.3℃, and pressure loss reduces by 2.37kPa, which improves the engine power and emission performance. The research results can provide references for further structure design and parameter optimiza- tion of intercooler chamber.
出处
《中国农机化学报》
2017年第4期82-87,104,共7页
Journal of Chinese Agricultural Mechanization
基金
国家重点研发计划"智能农机装备"重点专项(2016YFD0700400)
