This paper describes the benefits of sequential turbocharging in improving the operating envelope of a medium speed diesel engine. In particular, the high torque, low speed performance envelope can be greatly extended over that of a standard medium speed engine and, in addition, can offer improved operating range over what has been achieved with compressor air bypass/waste gate systems. This paper compares the three approaches on the basis of possible operating envelopes for a specific application, the new U.S. Navy LPD-17 amphibious assault ship, which has a very demanding requirement for high torque at low engine speed and low ambient temperatures. Comparison is made to the earlier approach to extend the operating envelope on the U.S. Navy LSD-41 class engines. The LSD-41 fleet has been in service since 1985 running with a compressor air bypass system developed jointly by Lockheed Shipyard and Coltec Industries for the U.S. Navy. (Contributions and author's replies in Vol. 7, p 1808)
Benefits of sequential turbocharging in improving high torque/low speed operation of medium speed diesel engines
Vorteile der sequentiellen Abgasturboaufladung zur Verbesserung des Betriebes durch ein hohes Drehmoment bei niedriger Drehzahl von mittelschnellaufenden Dieselmotoren
1998
13 Seiten, 17 Bilder, 9 Quellen
(+ 1 p. Discussion)
Conference paper
English
Turbocharging of modern medium-speed diesel engines
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