Marine Engines and Auxiliary Machinery
DOI: http://www.dx.doi.org/10.24866/2227-6858/2020-3-9

Pokusaev M., Khmelnitsky K., Ilyina E.

MIKHAIL POKUSAEV, Doctor of Engineering Sciences, Professor, Head of the Department Operation of Water Transport, e-mail: evt@astu.org
KONSTANTIN KHMELNITSKY, Postgraduate, e-mail: chuchera80@mail.ru
ELENA ILYINA, Candidate of Economic Sciences, Associate Professor, e-mail: ilyinaeg@mail.ru
Astrakhan State Technical University
Astrakhan, Russia

Evaluation of the effectiveness of outboard engine hoods
of a small vessel in real operating conditions

Abstract: The noise of power plants of various types and purposes is a considerable problem not only for the crew, but also for the environment, so reducing the noise of marine engines, including outboard motors, is an urgent and necessary task. At present, noise reduction is performed using noise-insulating structures, but multilayer structures with various hydraulic fillers are practically not considered. This study examines the use of a multi-layer hood with the use of a popular Russian outboard motor «Hangkai 4.0». The purpose of the study is to evaluate the effectiveness of various noise – insulating hoods, in real conditions of operation. The experiments were conducted by specialists of the Department Operation of water transport of the Astrakhan State Technical University using the software and hardware complex «Ecophysics-110A». As a result of experiments, it was determined that the use of a standard plastic hood reduces the noise of an unpowered motor by 9,3%; a noise-isolating hood by 10,1%; a multi-layer hood by 12,5%, which indicates the prospects for such developments in water transport.
Keywords: ship power plant noise, noise-isolating hood, small vessel, outboard boat motor.

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