Analysis of Flow Field for Automotive Exhaust System Based on
Computational Fluid Dynamics

Xu, Jianmin; Zhou, Shuiting

doi:10.2174/1874155x01408010587

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…Hence, the Numerical models have been developed to reduce the number of experiments and costs. Computational Fluid Dynamics (CFD) is widely employed in diverse engineering applications due to its ability to capture more details of flow structure [7][8]. It is also frequently utilized in the development of internal combustion engines and the reduction of emissions [9].…”

Section: Introductionmentioning

confidence: 99%

Influences of the dead end on the flow characteristics at the exhaust manifold of a marine diesel engine

Benek

Özsoysal

2021

Journal of Thermal Engineering

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A 3D Computational Fluid Dynamics (CFD) model of an exhaust manifold with and without a dead end has been developed to investigate the impacts of its geometry on the flow structure and the pressure distribution within the manifold. The model differs from previously studied models principally for its ability to approach the realistic operating principle of an engine as the modelled exhaust valves of the investigated engine open and close according to the firing order. The experimental results of an exhaust manifold without a dead end has been used to validate the CFD model through the pressure distribution and the flow structure. The outcomes demonstrated that the developed CFD model concurred well with the experimental data. The effects of the dead end on the exhaust manifold were then investigated using the validated CFD model. The study has revealed that the addition of a dead end (i) provides a smoother pressure distribution inside the manifold and increase in the efficiency of the turbocharger and (ii) decreases the pressure inside of the interconnection pipes of cylinders while the exhaust gas discharges. Moreover, the results disclose a smoother discharge of exhaust gases leading to a more effective sweeping of the exhaust gas thorough the cylinder without causing any exhaust backpressure. Furthermore, the dead end reduces the turbulence kinetic energy at the blind end of the exhaust manifold resulting in a decrease of pressure loss within. The abovementioned findings regarding to the flow structure and the pressure distribution within the exhaust manifold improve the efficiency of the engine.Cite this article as: Gorkem B, Osman A. Influences of the dead end on the flow characteristics at the exhaust manifold of a marine diesel engine.

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Section: Introductionmentioning

confidence: 99%

Influences of the dead end on the flow characteristics at the exhaust manifold of a marine diesel engine

Benek

Özsoysal

2021

Journal of Thermal Engineering

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“…Ahmed Elsayed et.al [5] carried out the Investigation of baffle configuration effect on the performance of exhaust mufflers. Jianmin Xu et.al [6] carried out the Analysis of Flow Field for Automotive Exhaust System Based on Computational Fluid Dynamics. Claudio Poggiani et.al [7] studied on the Optimization of a fast light-off exhaust system for motorcycle applications.…”

Section: Introductionmentioning

confidence: 99%

CFD Flow Analysis and Optimization of Exhaust Muffler

Trivedi¹

2017

IJRASET

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Silencer is an integral part of the exhaust system. The silencer serves the function of noise and vibration reduction. The exhaust gases in the combustion chamber which are at temperatures of around 1200K are released to the atmosphere at around 323K. Temperature reduction takes place efficiently as the flue gases flow through the exhaust system. In this study, flow analysis is carried out on various geometries and the geometries are checked for the pressure drop and temperature drop based on which the optimum geometry having minimum pressure drop and maximum temperature drop across the flow is selected and considered suitable. The entire flow analysis is done using ANSYS Fluent 18.0. Various Geometry combinations are used considering the minimum pressure drop. These geometries are analysed for flow considering Standard Air, Air as Ideal gas and Real gas as the fluid material for each of the geometries. For all the load cases the geometry which is having minimum pressure drop and maximum temperature drop is considered suitable for structural analysis.

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“…Xiang Kefeng [1] with the help offluent software numerical simulates the closing process of shuttle check valve. Jianmin Xu [2] analyzes the flow field of automotive exhaust system based on computational fluid dynamics and provides a theoretical basis for designing complex exhaust system. Guochang Zhao [3] researches on flow and temperature fields in aircraft engines.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Experimental Study of the Hydrostatic Spindle with Orifice Restrictors

He¹,

Li²,

Ren³

et al. 2016

Open mechan. eng. J.

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Based on the theory of hydrostatic bearings, this paper presents a study of replacing the rolling bearings in a cold drawing spindle with the liquid hydrostatic bearings. An unloading mechanism is designed, containing two hydrostatic radial bearings and a thrust bearing, according to the mechanical characteristics of the spindle. In this study, a mathematical model of the hydrostatic bearing oil pad is developed. The effects of the rotating speed on pressure and flow fields of the oil pad are simulated using the finite element analysis and verified experimentally. The pressure in all recesses decreases with the rotation speed. Oil velocity of the radial hydrostatic bearing recess increases with the rotation speed, while the fluid flow velocity has almost no correlation with the rotation speed of the thrust bearing. The numerical and experimental results of the pressure in the recesses are consistent, confirming the validity and feasibility of this design.

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Analysis of Flow Field for Automotive Exhaust System Based on Computational Fluid Dynamics

Cited by 5 publications

References 6 publications

Influences of the dead end on the flow characteristics at the exhaust manifold of a marine diesel engine

Influences of the dead end on the flow characteristics at the exhaust manifold of a marine diesel engine

CFD Flow Analysis and Optimization of Exhaust Muffler

Numerical Simulation and Experimental Study of the Hydrostatic Spindle with Orifice Restrictors

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