Analysis of Turbulence Model Effect on the Characterization of the In-Cylinder Flow Field in a HSDI Diesel Engine

2013 ◽  
Author(s):  
Stefano Fontanesi ◽  
Giuseppe Cicalese ◽  
Elena Severi
Keyword(s):  
Diesel Engine ◽  
Flow Field ◽  
Turbulence Model ◽  
Hsdi Diesel Engine ◽  
Cylinder Flow

Computation and Validation of In-Cylinder Flow Field, Swirl and Flow Coefficients for a Naturally Aspirated Single Cylinder Diesel Engine

2016 ◽  
Author(s):  
Siva Krishna Reddy Dwarshala ◽  
Suryanarayana Vandana ◽  
Ghodke Pundlik Rambhaji
Keyword(s):  
Diesel Engine ◽  
Flow Field ◽  
Single Cylinder ◽  
Cylinder Flow

Numerical Analysis of Swirl Control Strategies in a Four Valve HSDI Diesel Engine

2004 ◽  
Author(s):  
S. Fontanesi ◽  
E. Mattarelli ◽  
L. Montorsi
Keyword(s):  
Flow Field ◽  
Control Strategies ◽  
Cfd Simulations ◽  
Full Load ◽  
Partial Load ◽  
Swirl Intensity ◽  
Port Design ◽  
Current Production ◽  
Hsdi Diesel Engine ◽  
Cylinder Flow

Recent four value HSDI Diesel engines are able to control the swirl intensity, in order to enhance the in-cylinder flow field at partial load without decreasing breathing capabilities at full load. Making reference to a current production engine, the purpose of this paper is to envestiage the influence of port design and flow-control strategies on both engine permeability and in-cylinder flow field. Using previously validated models, 3-D CFD simulations of the intake and compression strokes are performed in order to predict the in-cylinder flow patterns originated by the different configurations. The comparison between the two configurations in terms of airflow at full load indicates that Geometry 2 can trap 3.03% more air than Geometry 1, while the swirl intensity at IVC is reduced (−30%). The closure of one intake valve (the left one) is very effective to enhance the swirl intensity at partial load: the Swirl Ratio at IVC passes from 0.7 to 2.6 for Geometry 1, while for Geometry 2 it varies from 0.4 to 2.9.

Numerical Simulation Study of the Influence of Structural Parameters of Combustion Chamber on In-Cylinder Flow Field of Diesel Engine

2013 ◽  
Vol 860-863 ◽  
pp. 1729-1732
Author(s):  
Guo Cheng Li ◽  
Ping Sun ◽  
Peng Hu
Keyword(s):  
Diesel Engine ◽  
Flow Field ◽  
Combustion Chamber ◽  
Structural Parameters ◽  
Volume Ratio ◽  
Initial Boundary ◽  
Swirl Flow ◽  
Swirl Ratio ◽  
Depth Ratio ◽  
Cylinder Flow

Based on the entity model of the type 4B26 diesel engine, calculated by CFD FIRE and combined with the software BOOST for the initial boundary conditions, the influence of combustion chamber structural parameters, such as boss height, surface-volume ratio and diameter-depth ratio of combustion chamber, on in-cylinder flow field of diesel engine was investigated. The results show that the influence of the boss height on flow field in the cylinder and the transient swirl ratio is obvious, and increasing the boss height is beneficial to urge the formation of mixture rapidly. Reducing the surface-volume ratio is beneficial for improving the maximum transient swirl ratio, and the air strength maintains well also, but has little influence to the retentivity of the swirl intensity. Meanwhile, reducing the diameter-depth ratio does not only improves the air flow movement strengthen in the combustion chamber, but also enhances the maximum transient swirl ratio, and the retentivity of swirl flow movement is satisfying.

In-Cylinder Flow Field of a Diesel Engine

2007 ◽  
Author(s):  
Ossi Kaario ◽  
Eric Lendormy ◽  
Teemu Sarjovaara ◽  
Martti Larmi ◽  
Pekka Rantanen
Keyword(s):  
Diesel Engine ◽  
Flow Field ◽  
Cylinder Flow

In-Cylinder Flow Field Analysis of a Single Cylinder DI Diesel Engine Using PIV and CFD

2003 ◽  
Author(s):  
Wook Choi ◽  
Byung-Chul Choi ◽  
Hyung-Koo Park ◽  
Kyung-Jei Joo ◽  
Je-Hyung Lee
Keyword(s):  
Diesel Engine ◽  
Flow Field ◽  
Field Analysis ◽  
Single Cylinder ◽  
Di Diesel Engine ◽  
Flow Field Analysis ◽  
Cylinder Flow

Effects of relative port orientation on the in-cylinder flow patterns in a small unit displacement HSDI Diesel Engine

2005 ◽  
Author(s):  
Giuseppe Cantore ◽  
Stefano Fontanesi ◽  
Vincenzo Gagliardi ◽  
Simone Malaguti
Keyword(s):  
Diesel Engine ◽  
Flow Patterns ◽  
Small Unit ◽  
Hsdi Diesel Engine ◽  
Cylinder Flow

Characterization of the effect of pressure difference on in-cylinder flow field using proper orthogonal decomposition (POD)

2018 ◽  
Author(s):  
Mohammed El-Adawy ◽  
M. R. Heikal ◽  
A. Rashid A. Aziz ◽  
Mhadi A. Ismeal ◽  
Hasanain A. Abdul Wahhab
Keyword(s):  
Flow Field ◽  
Proper Orthogonal Decomposition ◽  
Pressure Difference ◽  
Orthogonal Decomposition ◽  
Effect Of Pressure ◽  
Cylinder Flow ◽  
Proper Orthogonal
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