Numerical Simulation for Parametric Study of a Two-Stroke Direct Injection Linear Engine

2002 ◽  
Author(s):  
Ehab Shoukry ◽  
Samuel Taylor ◽  
Nigel Clark ◽  
Parviz Famouri
Keyword(s):  
Numerical Simulation ◽  
Parametric Study ◽  
Direct Injection ◽  
Linear Engine

scholarly journals Experimental and Parametric Study of Extended Fins In The Optimization of Internal Combustion Engine Cooling Using CFD

2012 ◽  
pp. 81-90
Author(s):  
J.Ajay Paul ◽  
Sagar Chavan Vijay ◽  
U. Magarajan ◽  
R.Thundil Karuppa Raj
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Internal Combustion Engine ◽  
Numerical Simulations ◽  
Parametric Study ◽  
Combustion Engine ◽  
Heat Transfer Characteristics ◽  
Engine Cooling ◽  
Fin Thickness ◽  
Annular Fins

In this experiment the single cylinder air cooled engines was assumed to be a set of annular fins mounted on a cylinder. Numerical simulations were carried out to determine the heat transfer characteristics of different fin parameters namely, number of fins, fin thickness at varying air velocities. A cylinder with a single fin mounted on it was tested experimentally. The numerical simulation of the same setup was done using CFD. The results validated with close accuracy with the experimental results. Cylinders with fins of 4 mm and 6 mm thickness were simulated for 1, 3, 4 &6 fin configurations.

A Numerical Simulation of Fuel Premixing for PCCI Combustion by Direct Injection

2011 ◽  
Author(s):  
Tsuyoshi Kondo ◽  
Tsuguhiko Nakagawa
Keyword(s):  
Numerical Simulation ◽  
Diesel Engine ◽  
Direct Injection ◽  
Vertical Direction ◽  
General Purpose ◽  
Injection Timing ◽  
Injection Angle ◽  
Equivalent Ratio ◽  
Local Equivalent ◽  
The Rich

Diesel engine has some advantages that thermal efficiency is high and control response is fast. On the other hand, more particulate matter (PM) and nitrogen oxide (NOx) are contained in the exhaust gas of diesel engine. Premixed charge compression ignition (PCCI) combustion is proposed to reduce the PM and NOx. In the lean range of equivalent ratio, unburned fuel is left and in the rich range, PM and soot are generated. For the practical use of PCCI combustion, mixing fuel and air well is important under the low equivalent ratio of injection. In this study, the mixing characteristics of fuel and air in a cylinder were numerically evaluated. A numerical simulation was performed with general-purpose simulator. The fuel has been injected into the vertical direction of cylinder and injection angle has been defined as 0 degree. In order to express the collusion, impingement on the wall model, that defines behavior of a droplet impinged on the wall with the Weber number of a droplet, was applied. By the injection timing, standard deviation of local equivalent ratio at Top Dead Center (TDC) was plotted. In this study, Frequency of mixing in each cell statistically was observed to evaluate the fuel-air mixing degree. The authors have taken notice of the condition which can be reduced the amount of scatter in the distribution of local equivalent ratio.

Numerical simulation of gas‐assisted polymer‐melt electrospinning: Parametric study of a multinozzle system for mass production

2020 ◽  
Vol 60 (9) ◽  
pp. 2111-2121
Author(s):  
Youbin Kwon ◽  
Jihyun Yoon ◽  
Seung‐Yeol Jeon ◽  
Daehwan Cho ◽  
Kwangjin Lee ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Mass Production ◽  
Parametric Study ◽  
Polymer Melt ◽  
Melt Electrospinning

The Proposal of Wall Thickness Management Criteria of T-Pipes

2012 ◽  
Author(s):  
Kiyoharu Tsunokawa ◽  
Taku Ohira ◽  
Naoki Miura ◽  
Yasumi Kitajima ◽  
Daisuke Yoshimura
Keyword(s):  
Numerical Simulation ◽  
Wall Thickness ◽  
Parametric Study ◽  
The Other ◽  
Wall Thinning ◽  
Study Results ◽  
Simulation Results ◽  
Design Construction

Although the reinforcement for openings is checked in accordance with design / construction standard when thinning was observed in T-pipes, this evaluation becomes too conservative or requires much time and effort. This paper describes additional parametric study results and proposes a guideline for thickness management of wall thinning T-pipes. On the other papers related to this project, the experiment and numerical simulation results are reported. This paper referred these results and performed further investigation.

Buckling Strength of Pressurized Cylindrical Shells under Axial Compression

2014 ◽  
Vol 638-640 ◽  
pp. 1750-1753
Author(s):  
Yu Chao Zheng ◽  
Yang Yan ◽  
Pei Jun Wang
Keyword(s):  
Numerical Simulation ◽  
Internal Pressure ◽  
Axial Compression ◽  
Parametric Study ◽  
Shell Thickness ◽  
Steel Shell ◽  
Plastic Buckling ◽  
Buckling Strength ◽  
Elastic Plastic ◽  
Steel Strength

A systematic parametric study was carried out to investigate the elastic and elastic-plastic buckling behaviors of imperfect steel shell subject to axial compression and internal pressure. Studied parameters include the magnitude of internal pressure, steel strength, and ratio of cylinder radius to shell thickness. Design equations were proposed for calculating the elastic and elastic-plastic buckling strength of imperfect steel shells under combination of axial compression and internal pressure. The buckling strength predicated by proposed equations agrees well with that from the numerical simulation.

scholarly journals Numerical simulation of internal and near-nozzle flow of a gasoline direct injection fuel injector

2015 ◽  
Vol 656 ◽  
pp. 012100 ◽  
Author(s):  
Kaushik Saha ◽  
Sibendu Som ◽  
Michele Battistoni ◽  
Yanheng Li ◽  
Shaoping Quan ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Direct Injection ◽  
Gasoline Direct Injection ◽  
Nozzle Flow ◽  
Fuel Injector

On the Response of Elastic-Plastic Tubes Under Combined Bending and Tension

1992 ◽  
Vol 114 (1) ◽  
pp. 50-62 ◽  
Author(s):  
J. Y. Dyau ◽  
S. Kyriakides
Keyword(s):  
Numerical Simulation ◽  
Parametric Study ◽  
Axial Load ◽  
Test Specimen ◽  
Experimental Results ◽  
Two Dimensional ◽  
Plastic Range ◽  
Rigid Surface ◽  
Axial Tension ◽  
Thin Walled

This paper is concerned with the response of long, relatively thin-walled tubes bent into the plastic range in the presence of axial tension. The work is motivated by the design needs of pipelines installed and operated in deep offshore waters. The problem is studied through a combination of experiment and analysis. In the experiments, long metal tubes were bent over a smooth, circular, rigid surface (mandrel). Bending of the tubes was achieved by shear and axial end loads. The experimental arrangement is such that a significant section of the test specimen is loaded and deformed in an axially uniform fashion. The ovalization induced in the specimen was measured as a function of the axial load in the tube for two mandrel radii. A two-dimensional numerical simulation of the problem has been developed and validated against the experimental results. This analysis was used to conduct a parametric study of the effect of tension on the ovalization induced in a long tube during bending.

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