| 摘要:以某型低速柴油机为研究对象，采用性能仿真软件搭建发动机模型，得到缸内温度、压力及成分变化规律；结合SO3生成反应化学动力学模型，计算分析燃气酸露点温度随曲轴转角的变化规律。结果表明:随着活塞的下行，酸露点温度下降；且缸内温度下降的速度大于酸露点温度的降幅，因此在低负荷时下止点附近容易出现酸低温腐蚀现象。指出冷却系统设计时要充分考虑这个因素。 |
| 关键词: 船用低速柴油机 重油 酸露点 腐蚀 |
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| Analysis of the Acid Dew-Point of a Low-Speed Marine Engine Using Heavy Fuel Oil |
| Zhou Jianwei,Cui Yi,Liu Lu,Dong Jingjin |
| Baoshan Iron & Steel Co., Ltd., Shanghai 200941;Key Laboratory for Power Machinery & Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240;China Shipbuilding Power Engineering Research Institute Co., Ltd., Shanghai 201206 |
| Abstract:Taking a certain kind of low-speed diesel engine as an example, the distributions and variations of the temperature, pressure and composition inside the cylinders were output by a simulation software. By introducing the chemical kinetic model of the SO3 formation, the change rule of the acid dew-point with the crank angle was calculated. The results show that the acid dew-point temperature decreases as the piston go down; the in-cylinder temperature decreases more rapidly than that of the acid dew-point, therefore, the acid low temperature corrosion is more likely to occur around the BDC, and should be taken into consideration the design of the cooling system. |
| Key words: low-speed engine heavy oil acid dew-point corrosion |
