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Sucharitha, G.
- Analysis on Three Dimensional Flow of Direct-injection Diesel Engine for Different Piston Configuration using CFD
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Authors
Affiliations
1 Department of Mechanical Engineering, Bharath University, Chennai, IN
1 Department of Mechanical Engineering, Bharath University, Chennai, IN
Source
Indian Journal of Science and Technology, Vol 6, No S6 (2013), Pagination: 4748-4753Abstract
Recent years have witnessed rapid developments in the field of IC engines. Today both the manufacturers and the customers are looking for low polluting and better efficient engines. Basically, the in-cylinder gas motion affects the performance of the engine. Increase in combustion efficiency obviously results in fuel economy and low pollutant emissions. So, it is necessary to have a better control over in-cylinder gas motion. The main objective of this project is three dimensional flow calculations of the compression stroke of a four-valve direct-injection Diesel engine for different Piston configuration. A limited number of validation calculations of the Intake stroke and compression stroke were performed in order to explore the limits of Computational Fluid Dynamics representation of the in-cylinder flow. In the main study, the flow characteristics such as Swirl Ratio, Radial Velocity field and Tangential Velocity field inside the engine cylinder equipped with different piston configurations were analyzed in detail. The results confirmed that the piston geometry had little influence on the in-cylinder flow during the Intake stroke and the first part of Compression stroke. The bowl shape plays a significant role near TDC and in the early stage of the expansion stroke by controlling the turbulence velocity fields.Keywords
In Line Cylinder Gas Motion, CFDFull Text
References
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- The Effect of Wall Properties on the Convective Peristaltic Transport of a Conducting Bingham Fluid through Porous Medium
Abstract Views :143 |
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Authors
Affiliations
1 Department of Mathematics, Sri Venkateswara University, Tirupati – 517502, Andhra Pradesh, IN
2 Department of Mathematics, Sree Vidyanikethan Engineering College, Tirupati – 517102, Andhra Pradesh, IN
3 Department of Mathematics, School of Advanced Sciences , VITUniversity, Vellore - 632014, Tamil Nadu, IN
1 Department of Mathematics, Sri Venkateswara University, Tirupati – 517502, Andhra Pradesh, IN
2 Department of Mathematics, Sree Vidyanikethan Engineering College, Tirupati – 517102, Andhra Pradesh, IN
3 Department of Mathematics, School of Advanced Sciences , VITUniversity, Vellore - 632014, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objective: In the present paper the influence of heat transfer, wall slip conditions, and wall properties on the peristaltic transport of an incompressible conducting Bingham fluid in a non-uniform porous channel is studied. Methods/Statistical Analysis: Exact analytical solutions have been obtained for the axial velocity and the temperature by using the assumptions of long wavelength and low-Reynolds number. Findings: The effects of the essential parameters on the velocity and temperature distributions are demonstrated through graphs. It is noticed that the presence of porous medium reduces the velocity and temperature in the peristaltic channel. Further, the size of the trapped bolus gets reduced due to the presence of porous medium/magnetic field whereas opposite behaviour is noticed with the increasing slip at the walls. Application/Improvements: The results reveal that the presence of magnetic field/porous medium has remarkable effect on the peristaltic transport of yield stress fluids (such as blood) which may lead to possible technological applications in designing bio- medical instruments.Keywords
Conducting Bingham Fluid, Convective Peristaltic Transport, Porous Medium, Trapping Phenomena, Wall Properties.Full Text