The paper mainly concerns the full turbocharging of two-stroke uniflow slow running marine engines and fast running engines for special purposes and gives an outline of the influence of engine timing and pipe layouts of the energy available for the turbines, as well as the result in the form of energy curves. On the basis of these curves the conditions for optimum adaptation of the turbochargers is discussed and the designs and characteristics of the B&W turbochargers are shown. Test results and engine performance for this turbocharger is shown and discussed. A simple and reliable layout for obtaining good slow running characteristics of engines without reversible timing of exhaust and scavenging is shown and discussed. In the report the author first refers to the consequences the introduction of turbo-charging of slow-running two-stroke engines has had for the diesel engine industry and the owners as it has brought the output of the single-acting two-stroke engine into a range where the steam turbine previously was considered to reign supreme. The first of the 15000 b.h.p. engines mentioned in the paper has satisfactorily passed its shop tests and is under installation in a tanker and more engines will follow in rapid succession. The developments are still on the move and in the not too distant future higher outputs in single screw installations will most likely go to sea. The main object of the paper is to draw the attention to the importance of having the most favourable adaptation of the charger to the engine. The word adaptation is in this context taken in its broadest sense to mean an adaptation for which the required air amounts and scavenging pressure are obtained with the best possible efficiency of the blower as well as the turbine. When the turbo-charger was designed, it was taken care that the optimum conditions for the engines were obtained. Furthermore a cut in the B&W turbo-charger and its blower characteristics is shown.
Two-stroke turbocharged engines and the influence of engine and turbocharger characteristics on the engine performance
Aufgeladene Zweitaktmotoren: Einfluss von Motor- und Turboladereigenschaften auf die Leistungsfähigkeit des Motors
1957
25 Seiten, 13 Bilder, 2 Tabellen
Aufsatz (Konferenz)
Datenträger
Englisch
Mitsubishi two-stroke turbocharged engine
Engineering Index Backfile | 1954
Turbocharged two-stroke diesel engine
Engineering Index Backfile | 1966
|Compression Engine Brake Performance with Turbocharged Diesel Engines
SAE Technical Papers | 1979
|Compression engine brake performance with turbocharged Diesel engines
Kraftfahrwesen | 1979
|