Numerical and Experimental Research on Thermal Insulation Performance of Marine Diesel Engine Piston Based on YSZ Thermal Barrier Coating

Although YSZ ceramic coating has been used in the field of aeroengines for a long time to protect blades from high temperature erosion, its application on marine engines is still very rare. In this study, YSZ powder was sprayed onto the upper surface of the Al-Si alloy piston by atmospheric plasma spraying. The piston with or without ceramic coatings was applied to the diesel engine bench, and the ship propulsion characteristics test was carried out to study the effect of the coating on the performance of the diesel engine when the ship was sailing. The temperature field results show that under 25% load, the temperature of the top surface of the coated piston is about 30.91 °C higher than that of the conventional piston. The increase in the temperature of the combustion chamber is conducive to better combustion of the fuel in the cylinder of the diesel engine. Therefore, when the marine diesel engine is tested for propulsion characteristics, the thermal efficiency is increased by 5% under the condition of 25% load.

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Model tests of a marine diesel engine powered by a fuel-alcohol mixture

Combustion Engines ◽

10.19206/ce-143486 ◽

2021 ◽

Author(s):

Marcin Zacharewicz ◽

Tomasz Kniaziewicz

Keyword(s):

Mathematical Model ◽

Diesel Engine ◽

Alternative Fuels ◽

Fossil Fuels ◽

Diesel Oil ◽

Marine Diesel Engine ◽

Engine Model ◽

Marine Engines ◽

Marine Diesel ◽

The Mathematical Model

The paper presents the results of model and empirical tests conducted for a marine diesel engine fueled by a blend of n-butanol and diesel oil. The research were aimed at assessing the usefulness of the proprietary diesel engine model in conducting research on marine engines powered by alternative fuels to fossil fuels. The authors defined the measures of adequacy. On their basis, they assessed the adequacy of the mathematical model used. The analysis of the results of the conducted research showed that the developed mathematical model is sufficiently adequate. Therefore, both the mathematical model and the computer program based on it will be used in further work on supplying marine engines with mixtures of diesel oil and biocomponents.

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Modeling Of The Dependence Of The Produced Amount Of Hydrogen Gas (Y) On The Amperage Of Cell (X) Of A Marine Diesel Engine Skl 3Nvd24

Pedagogika-Pedagogy ◽

10.53656/ped21-6s.24mod ◽

2021 ◽

Vol 93 (6s) ◽

pp. 273-278

Author(s):

Hristo Hristov ◽

◽

Ivaylo Bakalov ◽

Bogdan Shopov ◽

Dobromir Yovkov ◽

...

Keyword(s):

Experimental Data ◽

Diesel Engine ◽

Hydrogen Gas ◽

Sufficient Information ◽

Maritime Transport ◽

Marine Diesel Engine ◽

Marine Engines ◽

Marine Diesel ◽

Marine System ◽

Overall Efficiency

The introduction of new fuels in the field of maritime transport is considered a serious challenge due to the harsh environmental conditions in which the motor ship must operate. Modern marine engines are designed to improve the overall efficiency of the marine system so any attempt to exploit a new fuel must be accompanied by scientific research and experimental data to provide engineers and ship operators with sufficient information on its efficiency and safety.

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Assessment of the technical condition of a marine diesel engine based on the analysis of the exhaust gases chemical composition

Combustion Engines ◽

10.19206/ce-2019-221 ◽

2019 ◽

Vol 177 (2) ◽

pp. 122-126

Author(s):

Rafał KRAKOWSKI

Keyword(s):

Diesel Engine ◽

Technical Condition ◽

Test Methods ◽

Technical Diagnostics ◽

Marine Diesel Engine ◽

Exhaust Gas ◽

Exhaust Gases ◽

Injection Pump ◽

Marine Engines ◽

Marine Diesel

In the article, the concept of technical diagnostics in relation to marine engines was characterized. The compression ignition piston engine was presented as a diagnostic object. The next part of the article discusses the composition of exhaust gases with particular emphasis on compounds harmful to the environment. The available test methods for exhaust composition are also briefly described by means indication of the engine and exhaust gas analyzer. The reduction of emission of harmful compounds in the exhaust gases is also described in the article. The main part of the article presents the research object, i.e. the marine diesel engine piston and the exhaust gases analyzer, as well as tests carried out. The tests were performed for the engine in working order and inefficient condition in order to compare them with the simulated damages of injection pump and turbocharger. The article was completed conclusions.

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