组合喷射对双对置二冲程发动机燃烧过程影响的计算研究

摘要

For the lateral injection characteristic of opposed-piston opposed-cylinder (OPOC) engine with dual injector ,the in-fluence of different combined injection strategies on in-cylinder combustion heat release was researched .The calculation model was first built ,the rationality of parameter selection was verified ,the influences of injection proportion ,injection timing ,ori-fice diameter and injection duration on combustion heat release and engine performance for two injectors were analyzed ,and fi-nally the optimized combined scheme was acquired with good performance and low pressure rise rate .%针对双对置发动机采用双喷油器侧向喷油的特点，开展了不同组合喷油策略对缸内燃烧放热的模拟计算研究。首先建立了仿真计算模型，验证了模型参数选取的合理性，在此基础上分析了2个喷油器的循环油量分配比例、喷油始点、喷孔直径、喷油持续期等组合方案对燃烧放热规律以及发动机性能的影响，并以性能指标和降低压升率为目标得到了优化的组合方案。