Dynamics of soot formation and burnout in a gas diesel cylinder

Лиханов, В. А.; Лопатин, Олег Петрович

doi:10.1088/1757-899x/862/6/062033

Cited by 10 publications

(7 citation statements)

References 29 publications

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“…Diesel engines before the start of the experiment had a commensurate period of operation, the same technical condition of the main contact assemblies (crankshaft, bearing shells, fuel equipment) and were operated at the same loads (with an inconsistency of no more than ±2.5 %). This made it possible to draw a conclusion about their identity to each other both before the start of the experiment and during it [17,18].…”

Section: Research Resultsmentioning

confidence: 99%

Analysis of mechanical energy losses in marine diesels

Sagin

Madey

Stoliaryk

2021

TAPR

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The object of research is marine diesel engine oils, which provide lubrication, cooling and separation of friction surfaces. The subject of the research is the process of ensuring minimum mechanical losses in marine diesel engines. A problematic point in ensuring the lubrication of the cylinder-piston group and motion bearings is the lack of analytical and experimental studies that establish the relationship between the structural characteristics of engine oils and mechanical losses arising in marine internal combustion engines. The degree of orientational ordering of molecules and the thickness of the boundary lubricating layer are considered as the structural characteristics of engine oils. The determination of these values was carried out using the optical method based on the anisotropy of the light absorption coefficient by the boundary lubricant layer and the isotropic volume of the liquid (engine oil). The assessment of the level of mechanical losses arising in marine diesel engines was carried out according to an indirect indicator – the overshoot of the rotational speed and the time to reach the steady state of operation in the event of a change in load. It has been experimentally established that for engine oils used in marine internal combustion engines, the thickness of the boundary layer can be 15–17.5 µm. Motor oils, which are characterized by a higher ordering of molecules and a thickness of the boundary lubricant layer, ensure the flow of transient dynamic processes with less overshoot and a shorter transient time. This ensures the level of minimal mechanical losses occurring in marine diesel engines. The technology for determining the structural characteristics of engine oils can be used for any type and grade of oil (mineral or synthetic; high or low viscosity; used in both circulating and cylinder lubrication systems). The method of indirect assessment of mechanical losses of marine diesel engines can be used for any types of internal combustion engines of ships of sea and river transport (low-, medium- and high-speed; as well as performing the functions of both main and auxiliary engines).

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Section: Research Resultsmentioning

confidence: 99%

Analysis of mechanical energy losses in marine diesels

Sagin

Madey

Stoliaryk

2021

TAPR

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“…The option of maintaining the rheological characteristics of technical fluids proposed in this work is of an applied nature and is based on practical research. For the analytical calculation of the optimal processing time for the drilling fluid, which ensures the minimum stratification of its density with the simultaneous minimum energy consumption for the processing process, it is necessary to develop a mathematical model and perform mathematical modeling [24,25].…”

Section: Swot Analysis Of Research Resultsmentioning

confidence: 99%

“…These areas (S 0 6 , S 6 12 , S 12 18 , S 18 24 , S 24 30 , S 30 36 ) can be calculated as the areas of the corresponding trapezoids [4,23]. The values of the trapezoid areas (which characterize the density stratification of the drilling fluid along the depth TECHNOLOGY AUDIT AND PRODUCTION RESERVES -№ 5/2(61), 2021…”

Section: Tablementioning

confidence: 99%

Development of a method for maintaining the performance of drilling fluids during transportation by Platform Supply Vessel

Maryanov

2021

TAPR

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The object of research is the process of transportation of drilling fluid used for lubrication and cooling of drilling equipment of offshore oil production platforms. The subject of the study is the stratification of the density of the drilling fluid along the height of the cargo tank in which it is transported. The technology of transportation of drilling fluid on the Platform Supply Vessel is considered. A problematic point in ensuring this process is that during the transportation of drilling fluids, due to the action of gravitational forces on organic and inorganic compounds in their volume, there is a latent change in their dispersion over the volume of the fluid. This leads to the stratification and stratification of the fluid density along the height, as well as to the formation of sediments at the bottom of the cargo tanks, in which the drilling fluid is transported. The study is aimed at developing a technology that maintains a constant value of the density of the drilling fluid along the depth of the tank in which it is transported. The studies were carried out in the vessel system for transporting drilling fluid of a specialized marine vessel of the Platform Supply Vessel type with a deadweight of 5850 tons. It is experimentally established that for a transportation time of 6–36 hours, the density stratification of the drilling fluid is 3.04–32.04 %. As a method that ensures the minimum stratification of the density of the drilling fluid during its transportation, it is proposed to use an additional X-shaped circulation of the drilling fluid in the volume of adjacent cargo tanks. Studies have confirmed that the density stratification over a time period of 6–36 hours decreases to a range of 2.30–9.01 %. The complex use of additional X-shaped circulation and simultaneous air supply to the bottom of the cargo tank provides a density stratification value of 0.73–2.93 %. The proposed technology was tested on a specialized seagoing vessel of the Platform Supply Vessel type with a deadweight of 5850 tons and can be used on offshore vessels that ensure the operation of offshore oil production platforms.

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“…Nitrogen oxide formation during fuel combustion occurres when temperature into engine cylinder increase 1500 K and high oxygen concentration condition during atmospheric nitrogen oxidating is controlled in the burning process. In this respect, all methods that assure decreased NO X emission are focused on changes of stoichiometric proportion fuel-air, that leads to deterioration of mixing process, of oxidation and burning [17].…”

Section: Literature Review / Pregled Literaturementioning

confidence: 99%

Supplying of Marine Diesel Engine Ecological Parameters

Sagin¹,

Kuropyatnyk²,

Zablotskyi³

et al. 2022

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The by-pass system of exhaust gas for the engine 6L20 Wartsila has been observed. The requirements of Annex VI MARPOL towards nitrogen oxide concentration in ship engine exhaust gases have been provided. The purpose of research was the determination of diesel 6L20 Wartsila by-pass exhaust gases optimum volume – at this the nitrogen oxide minimal concentration in exhaust gases is assured, the minimal increase (comparing with operation mode without by-pass) – specific effective fuel consumption, supporting of necessary thermal factor diapason of engine cylinders. The research was performed for the exhaust gas by-pass diapason 0…10 % with engine load diapason 0.55…0.85 % from nominal power. Upon experimental results it has been stated that the exhaust gas by-pass usage favors the ecological parameters of ships engine operation modes – by this at the range of exploitation load 0.55…0.85 % from nominal power the nitrogen oxide concentration in exhaust gas is decreased to 1.32….12.97 %. The exhaust gas by-pass impairs the combustion process and favors the increasing of specific effective fuel consumption and increasing the temperature of exhaust gases. The exhaust gas by-pass system effectiveness assessment should be performed by complex estimation of the following engine operation parameters: the nitrogen oxide concentration in exhaust gas, increasing of specific effective fuel consumption(SFOC), the exhaust gas temperature. As optimal degree of exhaust gas by-pass value when the maximum decrease of nitrogen oxide emission at minimal increase of fuel consumption and simultaneous engine thermal factor handling has to be considered.

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Dynamics of soot formation and burnout in a gas diesel cylinder

Cited by 10 publications

References 29 publications

Analysis of mechanical energy losses in marine diesels

Analysis of mechanical energy losses in marine diesels

Development of a method for maintaining the performance of drilling fluids during transportation by Platform Supply Vessel

Supplying of Marine Diesel Engine Ecological Parameters

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