Improvement of the thermal and mechanical flow characteristics in the exhaust system of piston engine through the use of ejection effect

Plotnikov, L. V.; Жилкин, Б. П.; Brodov, Yu. M.

doi:10.1088/1742-6596/891/1/012154

Cited by 2 publications

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“…Today, the receipt of new data on the features of gas-dynamics and heat transfer in gas-air tracts of turbocharged engines is an important task, since the efficiency of power machines based on ICEs depends on the perfection of these processes [1][2][3]. Modern research in this field is devoted to the study of the parameters of gas flows at the inlet and outlet of the TC turbine [4][5][6], heat transfer inside the compressor [7], the thermal effect of the turbine on the compressor in the composition of the TC [8] and ways to improve the efficiency of the turbocharger [9,10].…”

Section: Introductionmentioning

confidence: 99%

Nonstationary gas-dynamics and local heat transfer in the output channel of the turbocharger compressor

2019

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Thermomechanical characteristics of the gas flow at the turbocharger compressor outlet largely determine the quality of the intake process in piston engines with boost. The article presents the results of an experimental study of gas-dynamics and heat transfer of gas flows after compression in a turbocharger centrifugal compressor. A brief description of the experimental setup, the configuration of pipes under investigation, the measuring system and the experimental features are given. The studies were carried out on a free compressor, i.e. without considering the piston part. Different conditions in the compressor outlet channel were created by installing special nozzles with different hydraulic resistances. It has been established that the local heat transfer increases from 23 to 46 % with an increase in the turbocharger rotor speed, depending on the outlet channel configuration. It should be noted that an increase in rotor speed is also accompanied by an increase in air flow through the channel. The increase in flow rate was from 10 to 42 %.

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Section: Introductionmentioning

confidence: 99%

Nonstationary gas-dynamics and local heat transfer in the output channel of the turbocharger compressor

2019

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Spectral analysis of gas-dynamic characteristics of pulsing gas flows in the exhaust system of a piston engine

Plotnikov

Brodov

Жилкин

et al. 2022

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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THE PURPOSE. To On the basis of spectral analysis, to evaluate the effect of installing a turbocharger turbine on the aeromechanics of pulsating gas flows in the engine exhaust system and to propose a method for controlling the aerodynamic and heat transfer characteristics of unsteady gas flows by creating an ejection effect in the exhaust system.METHODS. A laboratory experiment on a full-scale piston engine model was chosen to achieve this goal. Spectral analysis of harmonic dependences was used to assess changes in the structure of gas flows in the exhaust system. Mathematical modeling of the operating cycle of diesel engines was used to assess the potential positive effects of the use of an ejection system in the exhaust tract of a diesel engine. Three-dimensional solid modeling systems were used for sketch (engineering) studies of new (modernized) exhaust system designs.RESULTS. The article describes laboratory equipment, measuring system and data processing methods. A description of the boundary conditions in the course of experimental research is given. Comparison of aeromechanical and heat exchange characteristics of unsteady flows in the exhaust system of an engine with and without a turbocharger is carried out in the article. The qualitative and quantitative differences in aeromechanics and thermal physics of processes are shown. The proposed method of aeromechanical improvement of the exhaust system by creating an ejection.CONCLUSION. It was revealed that the turbine of a turbocharger has a significant effect on the aeromechanical characteristics of flows in the exhaust system. A significant decrease in the maximum flow rate in the exhaust tract (up to 3 times) is observed when installing a turbocharger. There is a decrease in flow characteristics through the turbocharged exhaust system (within 30%). It was found that the ejection effect in the engine exhaust system leads to stabilization of the flow, an increase in gas consumption by 6-12%, a decrease in specific fuel consumption by an average of 1% and an improvement in reliability indicators by 1.11-1.74%.

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Improvement of the thermal and mechanical flow characteristics in the exhaust system of piston engine through the use of ejection effect

Cited by 2 publications

References 1 publication

Nonstationary gas-dynamics and local heat transfer in the output channel of the turbocharger compressor

Nonstationary gas-dynamics and local heat transfer in the output channel of the turbocharger compressor

Spectral analysis of gas-dynamic characteristics of pulsing gas flows in the exhaust system of a piston engine

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