Simulation of in-cylinder flow and air-fuel interaction of four and two-valve DISI engines - A comparison
27 Nov 2013-Vol. 12
About: The article was published on 2013-11-27. It has received 1 citations till now. The article focuses on the topics: Combustion chamber & Four-stroke engine.
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TL;DR: The 60° modified manifold with a single pass shows better combustion and emission characteristics compared to that of regular inflow manifolds due to the improvement in turbulence levels.
Abstract: This study aims to enhance the turbulence of direct injection (DI) diesel engine by modifying the inlet manifold design with an inclined nozzle-like provision angles of 30°, 60°, and 90° along with its regular intake system. Numerical analysis was carried out using the computational fluid dynamics package (STAR-CD libraries of es-ice) to study the flow field and combustion characteristic with the modified intake manifold geometries. The computational investigation was carried out for both single and double pass conditions at 1500 rpm under high-load operating condition (5.2 kW). The computational results showed that the velocity magnitude of modified single pass intake manifold increases by about 10% that results in higher turbulence even near the point of fuel injection. Through the modification in the inlet manifold, the combustion parameters such as in-cylinder pressure and in-cylinder temperature are increased as compared to the standard manifold for the same quantity of fuel injected per cycle. In summary, the 60° modified manifold with a single pass shows better combustion and emission characteristics compared to that of regular inflow manifolds due to the improvement in turbulence levels.
1 citations
Cites methods from "Simulation of in-cylinder flow and ..."
...The changes created by these parameters on the turbulent flow field structures were simulated numerically and analyzed by many researchers (Harshavardhan and Mallikarjuna 2013; Gao and Cuneo 2016; Jia et al. 2017; Rathore et al. 2018; Tikar et al. 2019)....
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...The changes created by these parameters on the turbulent flow field structures were simulated numerically and analyzed by many researchers (Harshavardhan and Mallikarjuna 2013; Gao and Cuneo 2016; Jia et al. 2017; Rathore et al. 2018; Tikar et al. 2019)....
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References
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04 Mar 2002
66 citations
16 Apr 2007
62 citations
TL;DR: In this paper, the experimental investigations of the incylinder tumble flows in a single-cylinder engine with five different piston crown shapes at an engine speed of 1,000 rev/min., during suction and compression strokes under motoring conditions using particle image velocimetry.
Abstract: This paper deals with the experimental investigations of the in-cylinder tumble flows in a single-cylinder engine with five different piston crown shapes at an engine speed of 1,000 rev/min., during suction and compression strokes under motoring conditions using particle image velocimetry. Two-dimensional in-cylinder tumble flow measurements and analysis are carried out in combustion space on a vertical plane passing through cylinder axis. Ensemble average velocity vectors are used to analyze the tumble flow structure. Tumble ratio and average turbulent kinetic energy are evaluated and used to characterize the tumble flows. From results, it is found that at end of compression, pentroof-offset-bowl piston shows about 41 and 103% improvement in tumble ratio and average turbulent kinetic energy respectively, compared to that of flat piston. The present study will be useful in understanding effect of piston crown shapes on nature of the in-cylinder fluid tumble flows under real engine conditions.
35 citations
16 Apr 2012
33 citations
23 Feb 1998
31 citations