Experimental Study on Wear Monitoring of Marine Diesel Engine’s Piston Ring by Magnetoresistive Sensor

2012 ◽  
Vol 424-425 ◽  
pp. 132-136
Author(s):  
Guo Jin Chen ◽  
Zhang Ming Peng ◽  
Jian Guo Yang ◽  
Qiao Ying Huang
Keyword(s):  
Diesel Engine ◽  
Large Scale ◽  
Piston Ring ◽  
Test Bed ◽  
Operating Modes ◽  
Magnetoresistive Sensor ◽  
Marine Diesel ◽  
Wear Monitoring ◽  
Oil Tanker ◽  
Test Result

On the diesel engine’s test bed, this paper has studied the parameters regarding the diesel engine’s rotational speed, the piston ring’s width and wearing capacity and so on, and their relation with the output signal of the magnetoresistive sensor under the reverse drawing of the diesel engine. The research discovered that the piston ring’s wear and the magnetoresistive sensor’s output have the corresponding relationship. And on the oil tanker with the 6RTA52U diesel engine, the influence of the diesel engine’s operating parameters and the load situations to the magnetoresistive sensor’s output is surveyed under four kinds of different operating modes. The test result and the research conclusion provide the technical foundation for the online Wear monitoring of the large-scale marine diesel engine’s piston ring.

Simulation Analysis on Wearing Quantity of Marine Low-Speed Diesel Engine’s Piston Ring

2012 ◽  
Vol 152-154 ◽  
pp. 1057-1062
Author(s):  
Guo Jin Chen ◽  
Zhang Ming Peng ◽  
Jian Guo Yang ◽  
Qiao Ying Huang
Keyword(s):  
Mathematical Model ◽  
Diesel Engine ◽  
Piston Ring ◽  
Simulation Analysis ◽  
Marine Diesel Engine ◽  
Axial Motion ◽  
Marine Diesel ◽  
The Mathematical Model ◽  
Online Monitor ◽  
Oil Tanker

This paper establishes the mathematical model of the piston ring’s wearing capacity for the marine diesel engine, studies the influence of the piston ring’s axial motion and radial motion to the magnetic field’s output signal, computes and analyzes the corresponding relationships of the magnetoresistive sensor’s output and the piston ring’s wearing capacity, and does the on-board experiment on the oil tanker with the 6RTA52U diesel engine. Measuring actually the magnetoresistive sensor’s output corresponding to the piston ring’s wearing capacity of the marine diesel engine confirms the correctness for the mathematical model of the wearing capacity. The research conclusions lay the technical foundation for the online monitor of the piston ring’s wear.

Dynamic Modeling of Marine Diesel Propulsion System in All Kind of Running Conditions

2013 ◽  
Vol 655-657 ◽  
pp. 98-104
Author(s):  
Hai Yan Wang ◽  
Lei Chen ◽  
Ji An
Keyword(s):  
Diesel Engine ◽  
Large Scale ◽  
Working Condition ◽  
Friction Model ◽  
Propulsion System ◽  
Longitudinal Motion ◽  
Marine Diesel Engine ◽  
Test Bed ◽  
Sea Trial ◽  
Marine Diesel

For matching various working condition of ship propulsion system, a modified mean value model of a large-scale low-speed directly reversible marine diesel engine is put forward. A starting and braking torque module is added to the conventional model. A new friction model which considers static friction is adopted. So, the new model can run smoothly across all propulsion working condition, such as starting, running, braking, reversing, etc. The dynamic simulation models of propeller running across four quadrants and ship longitudinal motion are given too. The 5S60MC marine diesel engine equipped on a 76000DWT bulk carrier is taken as an example. The simulation results show that steady data of diesel are in good accordance with test-bed data, and dynamic data match to ship sea trial data in crash stop condition. The best is to read these instructions and follow the outline of this text.

Theoretical Calculation and Experimental Research on Sequential Turbocharging of a Marine Diesel Engine

2011 ◽  
Vol 305 ◽  
pp. 416-422
Author(s):  
Peng Qi Zhang ◽  
Qing Lin He ◽  
Yin Yan Wang
Keyword(s):  
Diesel Engine ◽  
Theoretical Calculation ◽  
Experimental Research ◽  
Marine Diesel Engine ◽  
Test Results ◽  
Low Load ◽  
Marine Diesel ◽  
Working Principle ◽  
Test Result

The paper introduces the working principle of the sequential turbo-charging (STC) system of multi-turbocharger. To improve low-load performance and operating economy of the 234V12 diesel engine, a STC system of multi-turbocharger for the diesel engine was designed. Theoretical calculation and experimental research was done on this improved marine diesel engine. Then, a 3-phase STC system is presented by analyzing and comparing the test result and the switching boundary of this system is confirmed. The test results show that the low-load performance is improved obviously by use of multi-turbocharger STC system.

3-D Numerical Simulation and Experiment Study on the Wear of Piston Ring-Cylinder Liner

2010 ◽  
Vol 139-141 ◽  
pp. 1036-1039 ◽  
Author(s):  
Jian Ping Zhang ◽  
Yan Kun Jiang ◽  
Xin Liu ◽  
Zhe Lin Dong
Keyword(s):  
Diesel Engine ◽  
Piston Ring ◽  
Elastohydrodynamic Lubrication ◽  
Cylinder Liner ◽  
Effect Of Temperature ◽  
Wear Loss ◽  
Asperity Contact ◽  
Warm Start ◽  
Deformation Equation ◽  
Marine Diesel

Aiming at a large marine diesel engine, a mathematical model for the 3-D elastohydrodynamic lubrication analysis of piston ring-cylinder liner was presented. The average Reynolds equation and asperity contact approach were combined with the elastic deformation equation. The asymmetry in the circumferential direction, gas blowby and the effect of temperature and pressure on the oil density and viscosity were considered. The 3-D wear simulation of piston ring-cylinder liner was performed when the diesel engine was operated under warm start and cold start conditions, respectively. The 3-D distribution rules show that the first gas ring has the biggest wear loss, and the maximum wear loss of cylinder liner occurs in the vicinity of TDCF. Finally, the results matched well with the wear measurements, and it indicates the present method is effective and can help engineers to improve the tribological performance of the diesel engine.

scholarly journals Development and Validation of 4 Stroke Marine Diesel Engine Numerical Model

2020 ◽  
Vol 3 (3) ◽  
pp. 359-372
Author(s):  
Vladimir Pelić ◽  
Tomislav Mrakovčić ◽  
Ozren Bukovac ◽  
Marko Valčić
Keyword(s):  
Diesel Engine ◽  
Numerical Model ◽  
Zone Model ◽  
Marine Diesel Engine ◽  
Test Bed ◽  
Conservation Of Energy ◽  
Engine Model ◽  
Marine Propulsion ◽  
Marine Diesel ◽  
Development And Validation

Increasing demands on energy efficiency and environmental acceptance are being imposed on marine propulsion plants. The fulfilment of the conditions set by the MARPOL Convention, Annex VI, regarding the emissions from exhaust gases of marine diesel engines is of particular interest. This paper presents the development and validation of a zero-dimensional, single-zone diesel engine numerical model. Presented numerical model is based on the law of conservation of energy and mass and solving the resulting differential equations. The single-zone model will serve as the basis for a model where the cylinder space is divided into two or three zones during combustion. In this way, the multi-zone model will allow the modelling of nitrogen oxide emissions with satisfactory accuracy. Validation of the diesel engine model was carried out for the Wärtsilä 12V50DF 11700 kW motor designed to drive a synchronous alternator. Obtained results and deviations of certain parameters in the operation of the engine with respect to the data obtained from the measurements on the test bed, are more than satisfactory regarding complexity of the numerical model. This confirmed the usability of the model for research purposes to optimize the marine diesel engine.

scholarly journals An Experimental Investigation into Combustion Fitting in a Direct Injection Marine Diesel Engine

2018 ◽  
Vol 8 (12) ◽  
pp. 2489 ◽  
Author(s):  
Yu Ding ◽  
Congbiao Sui ◽  
Jincheng Li
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Process Model ◽  
Direct Injection ◽  
Combustion Process ◽  
Operating Conditions ◽  
Marine Diesel Engine ◽  
Test Bed ◽  
Engine Combustion ◽  
Marine Diesel

The marine diesel engine combustion process is discontinuous and unsteady, resulting in complicated simulations and applications. When the diesel engine is used in the system integration simulation and investigation, a suitable combustion model has to be developed due to compatibility to the other components in the system. The Seiliger process model uses finite combustion stages to perform the main engine combustion characteristics and using the cycle time scale instead of the crank angle shortens the simulation time. Obtaining the defined Seiliger parameters used to calculate the engine performance such as peak pressure, temperature and work is significant and fitting process has to be carried out to get the parameters based on experimental investigation. During the combustion fitting, an appropriate mathematics approach is selected for root finding of non-linear multi-variable functions since there is a large amount of used experimental data. A direct injection marine engine test bed is applied for the experimental investigation based on the combustion fitting approach. The results of each cylinder and four-cylinder averaged pressure signals are fitted with the Seiliger process that is shown separately to obtain the Seiliger parameters, and are varied together with these parameters and with engine operating conditions to provide the basis for engine combustion modeling.

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