Simulation Study On Work Process And Turbocharging System Of Two-stroke Low-speed Diesel Engine

Study on work process and turbocharging system of two-stroke low-speed diesel engine is significant for marine engine matching and performance improving of our country. Based on the analysis of engine structure, an engine performance simulation model was developed according to the MAN B&W 7K90MC-C two-stroke low-speed diesel engine, which was made by Shanghai Hudong Heavy Machinery Co., Ltd...The sub-models in the simulation of two-stroke low-speed diesel engine were analyzed in detail and the method to accurate simulation was developed. This paper studied the effects of different scavenging models on simulation. The results showed that the"combined scavenging"model is more suitable for the 7K90MC-C diesel engine. The combustion model of nowadays two-stroke low-speed diesel engine was discussed. According to the measured cylinder pressure of 7S60MC-C and 6S70MC diesel engines, the characteristics of heat release rate were analyzed. A new combustion model was set up and the results were consistent with experiments. Turbocharger matching method was developed. The turbocharger parameters of 7K90MC-C diesel engine chosen by this method were similar with the data provided by the foreign company.The performances of 7K90MC-C diesel engine at part and rated load were simulated using the developed model. The results showed that the...