The operation during compressor surge of a medium speed marine diesel engine was examined on a test bed. The compressor of the engine's turbocharger was forced to operate beyond the surge line, by injecting compressed air at the engine intake manifold, downstream of the compressor during steady-state engine operation. While the compressor was surging, detailed measurements of turbocharger and engine performance parameters were conducted. The measurements included the use of constant temperature anemometry for the accurate measurement of air velocity fluctuations at the compressor inlet during the surge cycles. Measurements also covered engine performance parameters such as in-cylinder pressure and the impact of compressor surge on the composition of the exhaust gas emitted from the engine. The measurements describe in detail the response of a marine diesel engine to variations caused by compressor surge. The results show that both turbocharger and engine performance are affected by compressor surge and fast Fourier transform (FFT) analysis proved that they oscillate at the same main frequency. Also, prolonged steady-state operation of the engine with this form of compressor surge led to a non-negligible increase of NOx emissions.
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October 2016
Research-Article
Impact of Compressor Surge on Performance and Emissions of a Marine Diesel Engine
Nikolaos-Alexandros Vrettakos
Nikolaos-Alexandros Vrettakos
Laboratory of Marine Engineering,
National Technical University of Athens,
P.O. Box 64501, Zografos Campus,
Athens 15704, Greece
e-mail: nvrettakos@lme.ntua.gr
National Technical University of Athens,
P.O. Box 64501, Zografos Campus,
Athens 15704, Greece
e-mail: nvrettakos@lme.ntua.gr
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Nikolaos-Alexandros Vrettakos
Laboratory of Marine Engineering,
National Technical University of Athens,
P.O. Box 64501, Zografos Campus,
Athens 15704, Greece
e-mail: nvrettakos@lme.ntua.gr
National Technical University of Athens,
P.O. Box 64501, Zografos Campus,
Athens 15704, Greece
e-mail: nvrettakos@lme.ntua.gr
1Corresponding author.
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received September 29, 2015; final manuscript received March 22, 2016; published online April 26, 2016. Assoc. Editor: Knox T. Millsaps.
J. Turbomach. Oct 2016, 138(10): 101004 (11 pages)
Published Online: April 26, 2016
Article history
Received:
September 29, 2015
Revised:
March 22, 2016
Citation
Vrettakos, N. (April 26, 2016). "Impact of Compressor Surge on Performance and Emissions of a Marine Diesel Engine." ASME. J. Turbomach. October 2016; 138(10): 101004. https://doi.org/10.1115/1.4033186
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