Calculation of the density of motor aviation MS-20 brand oils at various temperature and pressure

Altunin, V.A.; Lvov, M.V.; Shchigolev, A.A.; Yusupov, Artur

doi:10.18698/2308-6033-2023-2-2252

EJSI

2023

DOI: 10.18698/2308-6033-2023-2-2252

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Calculation of the density of motor aviation MS-20 brand oils at various temperature and pressure

V.A. Altunin

M.V. Lvov

A.A. Shchigolev

et al.

Abstract: The article shows that various problems appear in the aircraft lubrication systems. These problems are associated with the quality of aviation motor oils, difficult thermodynamic conditions in their operation, negative sedimentation process, design features and deficiencies of piston aviation internal combustion engines, air-breathing engines, various aviation and ground power plants, as well in their filtering and cooling systems. Design and creation of new equipment foresees using aviation motor oils of vari… Show more

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Results of experimental study of the thermal processes at forced convection of the MS-20 engine aviation oil

Altunin,

Lvov,

Yusupov

et al. 2023

EJSI

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The paper presents results of experimental study of the thermal processes under conditions of the MS-20 aviation engine oil forced convection in the annular channel with internal heating. Thermal and other problems of the aircraft piston and jet engines oil systems are disclosed, the goal is set, and the tasks of this article are provided. Brief information about the experimental setup and the working sections, the methodology for conducting experimental studies and the operating parameters are given. The paper provides graphs of primary and secondary processing of the obtained experimental materials on heat transfer in regard to the MS-20 oil at various operating parameters for pressure, pumping rate and heat flux density. It analyzes alterations in the wall temperature of the heated working tube, as well as the heat transfer coefficient of the MS-20 aviation engine oil depending on heat flux density, pressure and oil pumping rate in the annular channel. Generalizing dependences of the Nusselt number on the oil pumping rate and on the Reynolds number are shown and analyzed at various heat flux densities and pressures. It was experimentally established that at the temperature of the working section outer wall of 373 K and below, no carbon deposits was forming on it, which confirmed the theory of G.F. Bolshakov on temperature dependence of the sedimentation process in the hydrocarbon liquids. Based on this, authors of the article developed a new method for preventing sludge formation in the aviation motor oils and averting sludge appearance on the heated metal surfaces in the oil volume. Experimental study results became a launching pad for further research in heat transfer intensification to the aircraft engine oils and preventing sludge formation in the aircraft engines using the electrostatic fields. That would be published in the following articles by the authors in this journal.

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Results of experimental study of the thermal processes at forced convection of the MS-20 engine aviation oil

Altunin,

Lvov,

Yusupov

et al. 2023

EJSI

View full text Add to dashboard Cite

show abstract

Analysis of the methods for calculating heat transfer in regard to the MS-20 brand motor aviation oil under conditions of forced convection in the ring channel given their verification with the experiment

Altunin,

Lvov,

Yusupov

et al. 2023

EJSI

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Based on experimental studies of the thermal processes in an annular oil channel with the internal heated replaceable metal tube, an experimental database was created. Experimental values of the heat transfer coefficient in regard to the MS-20 aircraft engine oil under its forced convection at various heat flux densities, pressures and pumping rates were calculated based on the experiment results using the Newton — Richmann formula. The authors of the article also created an experimental formula to calculate the Nusselt number. The results obtained were verified by comparing the experimental research results with results of other authors. Theoretical values of the heat transfer coefficient were obtained from the Nusselt number formulas presented by various authors. Formulas and the Nusselt number calculation formulas were analyzed, as well as the heat transfer coefficient in regard to the liquid heat carriers exposed to their forced convection presented by various authors. Graphs and tables compare calculation results according to the theoretical formulas by various authors and calculation results according to the experimental formula of the authors of the article with results of the experimental study. It was established that the experimental formula of the authors of the article was the most accurate and workable. Recommendations are given for calculating the heat transfer coefficient in regard to the MS-20 aircraft engine oil in the annular channel under various thermodynamic conditions. It is proposed to introduce the methodology in conducting an experimental study and creating experimental formulas for calculating the Nusselt number and the heat transfer coefficient in regard to the MS-20 brand aircraft engine oil in studying the other aviation engine oils.

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Calculation of the density of motor aviation MS-20 brand oils at various temperature and pressure

Cited by 2 publications

References 2 publications

Results of experimental study of the thermal processes at forced convection of the MS-20 engine aviation oil

Results of experimental study of the thermal processes at forced convection of the MS-20 engine aviation oil

Analysis of the methods for calculating heat transfer in regard to the MS-20 brand motor aviation oil under conditions of forced convection in the ring channel given their verification with the experiment

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