Flow Field Influence Analysis of Combination Intake Port to Port and In-Cylinder for a Four-Valve Diesel Engine
Intake port structure directly affects the flow characteristics and combustion process of diesel engine, and then affects the comprehensive performance of diesel engine. To the intake ports of a four-valve direct injection diesel engine, the flow characteristics are analyzed on the four combined int...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Isfahan University of Technology
2019-01-01
|
Series: | Journal of Applied Fluid Mechanics |
Subjects: | |
Online Access: | http://jafmonline.net/JournalArchive/download?file_ID=49113&issue_ID=256 |
id |
doaj-462f23390e274f1ca0c2ee9583034ffb |
---|---|
record_format |
Article |
spelling |
doaj-462f23390e274f1ca0c2ee9583034ffb2020-11-25T02:34:03ZengIsfahan University of Technology Journal of Applied Fluid Mechanics1735-35722019-01-01123871881.Flow Field Influence Analysis of Combination Intake Port to Port and In-Cylinder for a Four-Valve Diesel EngineD. W. Jia0X. W. Deng1Y. Wang2J. L. Lei3Yunnan Key Laboratory of Internal Combustion Engine, Kunming University of Science and Technology, Kunming 650500, ChinaYunnan Key Laboratory of Internal Combustion Engine, Kunming University of Science and Technology, Kunming 650500, ChinaYunnan Yuntong Judicial Expertise Center, Kunming 650224, ChinaYunnan Key Laboratory of Internal Combustion Engine, Kunming University of Science and Technology, Kunming 650500, ChinaIntake port structure directly affects the flow characteristics and combustion process of diesel engine, and then affects the comprehensive performance of diesel engine. To the intake ports of a four-valve direct injection diesel engine, the flow characteristics are analyzed on the four combined intake ports : (1) helical (left) and tangential (right), (2) tangential (left) and helical (right); (3) helical (left) and helical (right); and (4) tangential (left) and tangential (right).And the influence of air flow in four combined intake ports to in-cylinder gas flow is also analyzed. Results show that the helical and tangential combination intake ports flow velocity increases with the valve lift increases, and small turbulence arises at the valve guide lug, and the intake flow velocity of the minimum cross-section of the junction of the guiding section and the helical section is the maximum. The air flow in- cylinder moves from top cylinder head bottom to the cylinder bottom, the air flow is enlarged gradually by the small-scale irregular swirl, which eventually converges to a single swirl. The turbulence kinetic energy is very big when the air is just entering the cylinder, the flow space expands rapidly, and the dissipation of turbulent kinetic energy is very significant with the gas moves to the bottom of the cylinder.http://jafmonline.net/JournalArchive/download?file_ID=49113&issue_ID=256Four-valve diesel engine; Combined intake ports; Air flow in intake ports; Air flow in-cylinder. |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
D. W. Jia X. W. Deng Y. Wang J. L. Lei |
spellingShingle |
D. W. Jia X. W. Deng Y. Wang J. L. Lei Flow Field Influence Analysis of Combination Intake Port to Port and In-Cylinder for a Four-Valve Diesel Engine Journal of Applied Fluid Mechanics Four-valve diesel engine; Combined intake ports; Air flow in intake ports; Air flow in-cylinder. |
author_facet |
D. W. Jia X. W. Deng Y. Wang J. L. Lei |
author_sort |
D. W. Jia |
title |
Flow Field Influence Analysis of Combination Intake Port to Port and In-Cylinder for a Four-Valve Diesel Engine |
title_short |
Flow Field Influence Analysis of Combination Intake Port to Port and In-Cylinder for a Four-Valve Diesel Engine |
title_full |
Flow Field Influence Analysis of Combination Intake Port to Port and In-Cylinder for a Four-Valve Diesel Engine |
title_fullStr |
Flow Field Influence Analysis of Combination Intake Port to Port and In-Cylinder for a Four-Valve Diesel Engine |
title_full_unstemmed |
Flow Field Influence Analysis of Combination Intake Port to Port and In-Cylinder for a Four-Valve Diesel Engine |
title_sort |
flow field influence analysis of combination intake port to port and in-cylinder for a four-valve diesel engine |
publisher |
Isfahan University of Technology |
series |
Journal of Applied Fluid Mechanics |
issn |
1735-3572 |
publishDate |
2019-01-01 |
description |
Intake port structure directly affects the flow characteristics and combustion process of diesel engine, and then affects the comprehensive performance of diesel engine. To the intake ports of a four-valve direct injection diesel engine, the flow characteristics are analyzed on the four combined intake ports : (1) helical (left) and tangential (right), (2) tangential (left) and helical (right); (3) helical (left) and helical (right); and (4) tangential (left) and tangential (right).And the influence of air flow in four combined intake ports to in-cylinder gas flow is also analyzed. Results show that the helical and tangential combination intake ports flow velocity increases with the valve lift increases, and small turbulence arises at the valve guide lug, and the intake flow velocity of the minimum cross-section of the junction of the guiding section and the helical section is the maximum. The air flow in- cylinder moves from top cylinder head bottom to the cylinder bottom, the air flow is enlarged gradually by the small-scale irregular swirl, which eventually converges to a single swirl. The turbulence kinetic energy is very big when the air is just entering the cylinder, the flow space expands rapidly, and the dissipation of turbulent kinetic energy is very significant with the gas moves to the bottom of the cylinder. |
topic |
Four-valve diesel engine; Combined intake ports; Air flow in intake ports; Air flow in-cylinder. |
url |
http://jafmonline.net/JournalArchive/download?file_ID=49113&issue_ID=256 |
work_keys_str_mv |
AT dwjia flowfieldinfluenceanalysisofcombinationintakeporttoportandincylinderforafourvalvedieselengine AT xwdeng flowfieldinfluenceanalysisofcombinationintakeporttoportandincylinderforafourvalvedieselengine AT ywang flowfieldinfluenceanalysisofcombinationintakeporttoportandincylinderforafourvalvedieselengine AT jllei flowfieldinfluenceanalysisofcombinationintakeporttoportandincylinderforafourvalvedieselengine |
_version_ |
1724810565076910080 |