Prediction of the ROHR (rate of heat release) and NOx production in medium-speed marine diesel engines was investigated. The subject of this paper is qualitative and quantitative evaluation of the numerical results. FIRE code v8.1 was used to examine the behavior of spray and combustion phenomena in diesel engine. Wave breakup and Zeldovich models were adopted to describe the atomization characteristics and NOx formation. The spray visualization was performed experimentally in the constant-volume high-pressure chamber to clarify numerical results on the spray characteristics of the spray angle and penetration. Time-resolved spray behaviors were captured by high-speed digital camera. The simulation results were tested with the experimental data of the real engine. Finally, with adjustment of some model constants, reasonable agreements between experimental and simulated results on the ROHR and NOx were shown.
- Internal Combustion Engine Division and Rail Transportation Division
A Study on the Numerical Prediction of Heat Release Rate and NOx Production in Medium-Speed Marine Diesel Engines
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Kim, JY, Yoon, WH, & Ha, JS. "A Study on the Numerical Prediction of Heat Release Rate and NOx Production in Medium-Speed Marine Diesel Engines." Proceedings of the ASME 2003 Internal Combustion Engine and Rail Transportation Divisions Fall Technical Conference. Design and Control of Diesel and Natural Gas Engines for Industrial and Rail Transportation Applications. Erie, Pennsylvania, USA. September 7–10, 2003. pp. 137-143. ASME. https://doi.org/10.1115/ICEF2003-0716
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