高热效率重型柴油机燃烧系统优化研究
Research on the Optimization of Combustion System of a High Thermal Efficiency Diesel Engines
为提高柴油机热效率，对柴油机燃烧系统进行优化，分别从燃烧室型线优化和油嘴参数优化两个方面改善柴油机热效率。基于数值模拟指导燃烧室与喷油器优化匹配，设计了5种深度，2种类型，3种压缩比燃烧室型线，配合不同正时、喷射夹角进行DOE仿真，并推荐较优方案进行试制加工和试验验证。计算结果表明：在爆压设计边界250bar内，高压缩比对IMEP改善较为明显；喷油器的喷射夹角设计为150°比原机147°时IMEP有改善；冷EGR燃烧系统方案设计中，双卷流类型燃烧…查看全部>>
This paper studiedonimproving the thermal efficiency of diesel engine, the combustion system of diesel engine is optimized, and the thermal efficiency of diesel engine is improved from two aspects: combustion chamber profile optimization and oil nozzle parameter optimization. Based on numerical simulation to guide the optimal matching of combustion chamber and injector, 5 depth, 2 types and 3 compression ratio combustion chamber profiles are designed, DOE si…查看全部>>
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