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Your search keyword '"M. O. Misnik"' showing total 4 results
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4 results on '"M. O. Misnik"'

1. Physical and numerical simulation of the thermal and mechanical characteristics of stationary flows in the gasair paths of piston engines

Author

L. V. Plotnikov, Yu. M. Brodov, B. P. Zhilkin, A. M. Nevolin, and M. O. Misnik

Subjects
reciprocating internal combustion engines, intake and exhaust systems, gas dynamics and heat exchange, stationary flows, transverse profiling, Production of electric energy or power. Powerplants. Central stations, TK1001-1841
Abstract

Thermomechanical perfection of intake and exhaust systems largely determine the efficiency of the working process of reciprocating engines (ICE). The article presents the results of numerical simulation and experimental study of the heat transfer of gas flows in profiled gas- air systems of ICEs. A description of the numerical simulation technique, experimental setup, configurations of the studied hydraulic systems, measuring base and features of the experiments are given. On the basis of numerical modeling, it has been established that the use of profiled sections with cross sections in the shape of a square or a triangle in exhaust systems of an ICEs leads to a decrease in the heat transfer coefficient by 5-11%. It is shown that the use of similar profiled sections in the intake system of reciprocating engines also leads to a decrease in the heat transfer coefficient to 10 % at low air flow rates (up to 40 m/s) and an increase in the heat transfer coefficient to 7% at high speeds. Experimental studies qualitatively confirm the simulation results.

Published
2019
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2. Heat transfer intensity of pulsating gas flows in the exhaust system elements of a piston engine

Author

Yu. M. Brodov, M. O. Misnik, and Leonid Plotnikov

Subjects
ECONOMIC PERFORMANCE, CRANKSHAFTS, HEAT TRANSFER, SINGLE CYLINDER ENGINE, 0211 other engineering and technologies, Mechanical engineering, 02 engineering and technology, Heat transfer coefficient, GASES, 01 natural sciences, law.invention, Piston, NON-STATIONARITIES, Cylinder head, law, 0103 physical sciences, Heat exchanger, GAS DYNAMICS, 021108 energy, 010301 acoustics, EXHAUST SYSTEMS (ENGINE), lcsh:Environmental sciences, FLOW OF GASES, PISTONS, Heat engine, Crankshaft, lcsh:GE1-350, FULL-SCALE MODELING, GAS EXCHANGE PROCESS, ENGINE CRANKSHAFTS, LOCAL HEAT TRANSFER COEFFICIENT, Heat transfer, Environmental science, SYSTEM ELEMENTS, CYLINDER HEADS, Intensity (heat transfer)
Abstract

Internal combustion engines are the most common sources of energy among heat engines. Therefore, the improvement of their design and workflow is an urgent task in the development of world energy. Thermal-mechanical perfection of the exhaust system has a significant impact on the technical and economic performance of piston engines. The article presents the results of experimental studies of gas-dynamics and heat exchange of pulsating gas flows in the exhaust system of a piston engine. Studies were carried out on a full-scale model of a single-cylinder engine. The article describes the instrument-measuring base and methods of experiments. The heat transfer intensity was estimated in different elements of the exhaust system: the exhaust pipe, the channel in the cylinder head, the valve assembly. Heat transfer studies were carried out taking into account the gas-dynamic nonstationarity characteristic of gas exchange processes in engines. The article presents data on the influence of gas-dynamic and regime factors on the heat transfer intensity. It is shown that the restructuring of the gas flow structure in the exhaust system occurs depending on the engine crankshaft speed, this has a significant impact on the local heat transfer coefficient. It has been established that the heat transfer intensity in the valve assembly is 2-3 times lower than in other elements of the exhaust system. © The Authors, published by EDP Sciences. Russian Science Foundation, RSF: 18-79-10003 The work has been supported by the Russian Science Foundation (grant No. 18-79-10003).

Published
2019

3. Influence of channels transverse profiling on the heat transfer intensity in the intake system of internal combustion engine

Author

Leonid Plotnikov and M. O. Misnik

Subjects
History, AIR INTAKES, Materials science, HEAT TRANSFER, HEAT TRANSFER RATE, Airflow, GEOMETRIC CONFIGURATIONS, AIR FLOW-RATE, PISTON ENGINES, Education, law.invention, Piston, law, Heat exchanger, GAS DYNAMICS, HEAT EXCHANGE, Steady state, Computer simulation, STEADY STATE, AIR, Mechanics, Computer Science Applications, INTERNAL COMBUSTION ENGINES, Internal combustion engine, Heat transfer, AIR FLOW, GAS STREAMS, Intensity (heat transfer)
Abstract

Gas-dynamic perfection and intensity of heat exchange of intake systems determine the efficiency of the piston engine. The results of numerical simulation and experimental study of the heat transfer of gas streams in the intake system of engines having different configurations are presented in the article. Methods of modeling, experimental setup, geometric configuration of pipelines and measuring base are described in the paper. The investigations were carried out under steady-state air flow in the system. The results of mathematical modeling were verified using experimental studies. It is established that the use of profiled sections in the intake system leads to a decrease in the heat transfer rate up to 20 % at low air flow rates (up to 40 m/s) and an increase in the heat transfer rate up to 9 % at high speeds. © Published under licence by IOP Publishing Ltd. The work has been supported by the Russian Science Foundation (grant No. 18-79-10003).

Published
2018

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