A Zero-Dimensional Mixing Controlled Combustion Model for Real Time Performance Simulation of Marine Two-Stroke Diesel Engines

• Published in: Energies (Basel) Vol. 12; no. 10; p. 2000
• Main Authors: Feng, Yongming, Wang, Haiyan, Gao, Ruifeng, Zhu, Yuanqing
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 2019
• Subjects: Calibration; Combustion; Combustion chambers; Computer simulation; Control systems; Cylinders; Diesel; Diesel engines; Diesel fuels; Electronic control; Energy; Engines; Enthalpy; Exhaust gases; Exhausting; Experimental data; Fuel injection; Fuel oils; Fuel sprays; Gas pressure; Gas temperature; Heat; Heat release rate; Heat transfer; Injection; Internal combustion engines; Internal energy; Low speed; Marine engines; Marine propulsion; marine two-stroke diesel engine; Mass flow; mixing controlled combustion model; Nozzle geometry; Optimization; Performance prediction; performance simulation; Prediction models; Real time; real-time modeling; Scavenging; Scavenging flow; Simulation; Specific heat; State variable; Detroit Michigan; United States > US; China
• ISSN: 1996-1073; 1996-1073
• DOI: 10.3390/en12102000

The paper presents a performance prediction model of marine low-speed two-stroke diesel engines based on an advanced MCC (mixture controlled combustion) model coupled with a fuel injection model. Considering the time of real calculation, the so-called “concentrated exhausting gas” scavenging model and the working process model are used in the present work, and improved by introducing the ratio of pure combustion product over the total gas mass in the cylinder as an expression of the working medium components. The reaction rate model in the zero-dimensional MCC model is improved by introducing the fraction of combustion product in the fuel spray, and the relationship between the combustion model and scavenging quality is established. Meanwhile, the combustion model was simplified in the diffusion combustion phases and integrated with the fuel injection model in order to respond to the change of injection profile and injection timing. A large-scale low-speed marine diesel engine was used for a simulation. The results of the whole model are consistent with experimental data and the speed of calculation is fast enough for real time simulation of low speed and medium speed diesel engines. The prediction model can be used in the design and calibration of the electronic control system and performance optimization of the marine two-stroke diesel engine.