柴油机活塞用铝合金材料烧蚀性能研究  

Analysis of Ablation Properties of Aluminum Alloy Used in Diesel Engine Piston

作　　者：秦朝举[1,2] 张卫正[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]华北水利水电大学机械学院,郑州450045

出　　处：《内燃机工程》2014年第5期107-112,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家"九七三"重点基础研究发展计划项目(613570303)

摘　　要：利用所建的烧蚀试验装置模拟活塞在柴油机气缸内的环境,考核了活塞用铝合金材料的烧蚀性能,并对铝合金材料的烧蚀机理及烧蚀模型进行了探讨。研究结果表明:表面温度对铝合金材料烧蚀的影响最显著,气流冲刷角度、燃气速度对烧蚀的影响则依次减弱;铝合金材料的烧蚀机制是熔化烧蚀和气流剥蚀两方面的共同作用。对铝合金材料的烧蚀过程进行了数值计算,并将计算得到的烧蚀率与试验结果进行了比较,结果吻合较好。The ablation property of aluminum alloy used in diesel engine piston was evaluated through simulating piston working conditions with ablation test equipment. The ablation mechanism and model of aluminum alloy was explored. The results showed that surface temperature presents the most significance on the ablation of aluminum alloy. The ablation effects of erosion angle and gas flow velocity decrease in turn. The ablation mechanism of aluminum alloy is the combination of melting ablation and gas flow erosion. A simulation of the ablation process of aluminum alloy was carried out and results were compared with experimental data. The comparison showed that the calculated results matched well with the experiment data in ablation rate.

关 键 词：内燃机 柴油机 活塞 数学模型 烧蚀 

分 类 号：TK423.33[动力工程及工程热物理—动力机械及工程]