建立某型大功率柴油机的三维仿真模型并进行实验验证，基于验证模型的仿真结果对该型大功率柴油机循环工况的整体性能进行优化，在优化过程中提出“正向工况”和“协同工况”的概念和确定方法。结果表明，在仅对喷油角度进行调整的情况下，通过“正向工况”和“协同工况”间多工况的协同匹配，在保持循环比油耗基本不变时，循环NOx排放相比原机降低了6.43%；在保持循环NOx排放基本不变时，循环比油耗相比原机降低了1.53%，降幅达到3.18 g/(kW·h)。本研究提出的优化方法和过程对大功率柴油机循环工况或多工况整体性能的优化具有指导意义。
Based on the 3D simulation results of the verification model, this study optimizes the overall performance of the test cycle of a certain type of high-power diesel engine through coordinated matching among multiple operating conditions in the cycle. In the optimization process, the concepts and determination methods of ''forward operating conditions'' and "cooperative operating conditions" are proposed. The results show that through the coordinated matching of multiple operating conditions between "forward operating condition" and "cooperative operating condition", the cycle NOx specific emission can be reduced by 6.43% under the premise of only adjusting the injection angle and keeping the cycle specific fuel consumption not increasing. In the case of keeping the cycle NOx specific emission from increasing, the cycle specific fuel consumption can be reduced by 1.53%, namely, 3.18 g/(kW·h). The optimization methods and processes proposed in this study have guiding significance for the overall performance optimization of diesel engine cycle conditions or multiple operating conditions.
2024,46(7): 106-111 收稿日期：2023-4-15
DOI：10.3404/j.issn.1672-7649.2024.07.018
分类号：U664.121
作者简介：张英(1977-),男,工程师,研究方向为船舶柴油机节能减排
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