The high-speed, high-power and lightweight marine diesel engine is the predominant prime mover used for high-speed ferries. Short passage and fast turn round, which is the typical operation of high-speed ferries, requires frequent starting, rapid acceleration and hot shutdown of the main engine. It is considered that such an operation in high-speed ferries are very severe conditions for high-speed diesel engines and generates frequently alternating thermal or mechanical loads on engine components, which cause various damages. Therefore, the full-scale measurements were carried out to collect data on the performance and the load characteristics of the high-speed diesel engine in service. The measurement data are driving shaft torque of water jet, shaft speed, engine speed, in-cylinder pressure, exhaust gas temperature, ship motions (rolling and pitching), etc. In this paper, the following contents are described. 1. Time history and fluctuation of engine speed and the shaft output of the water jet from the starting engine until entering port is shown, and the power absorption to shaft speed characteristic of a water jet during manoeuvring in harbour and at cruising condition is described. 2. The variations of various parameters such as the engine speed, the water jet shaft output, the maximum cylinder pressure, the ship motions (rolling and pitching) are compared in rough sea state condition and in moderate sea state condition. The power spectral analyses of shaft output and ship motions are adopted in various sea state condition. 3. Using in-cylinder pressure data in various engine operations, such as motoring, starting, idling, accelerating, cursing and decelerating, analyses of the start of combustion and the rate of pressure rise due to combustion are performed. The induced gas vibration in the volume of connecting passage of pressure transducer is also analyzed. 4. As it is difficult to record an engine cycle reference signal in service condition, the method, which is able to obtain the angle of TDC (piston top dead center) accurately from the cylinder pressure curve analysis, is presented. According to the calculation results of the heat release rate and the average gas temperature in various engine operations, the combustion analysis of the high-speed diesel engine is discussed.


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    Titel :

    Performance and combustion analysis of high-speed diesel engine in fast ferry under normal service condition


    Weitere Titelangaben:

    Analyse der Belastungen schnelllaufender Dieselmotoren in Schnellfähren


    Beteiligte:


    Erscheinungsdatum :

    2004


    Format / Umfang :

    8 Seiten, 13 Bilder, 1 Tabelle, 4 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch




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