Ship Design and Construction
Oleksiy Bondarenko, Tetsugo Fukuda
OLEKSIY BONDARENKO, Dr. of Engineering (Ph.D.), Researcher, Department of Energy and Power System, National Maritime Research Institute of Japan, Tokyo 181004, Japan, e-mail: bond@nmri.go.jp
TETSUGO FUKUDA, Chief Researcher, Department of Energy and Power System, National Maritime Research Institute of Japan, Tokyo 181004, Japan, e-mail: tfukuda@nmri.go.jp
Consideration of propulsion engine operation in combination with ship hull air lubrication
This paper discusses the result of full-scale experiments on a four-stroke and two-stroke engines equipped with a scavenging air bypass system for use with an air lubrication system. The experimental results revealed the effect of scavenging air bleeding on engine performance in both the steady-state and transient conditions and helped to come up with ideas on extending operation limit of main propulsion engine with partial scavenging air bleeding. Furthermore, simple and reliable simulation model of a Diesel engine and scavenging air bypass system was developed and validated against available experimental data.
Key words: air bypass, air lubrication, propulsion plant, engine simulation.
