Simulation Study of 1D-3D Coupling for Different Exhaust Manifold Geometry on a Turbocharged Gasoline Engine

Zhang, Chaolin; Hu, Bo; Lai, Chenguang; Zhang, Hailin; Qin, Ling; Leng, Xiaoli; Huang, Wei

doi:10.4271/2018-01-0182

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…Zhang et al [12] investigated two different exhaust geometries with 1D and 3D mixed models. They reduced the turbulence and pressure losses in the manifold with the improvements in its geometry.…”

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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Flow analysis in different geometries for optimization of exhaust manifold in a locomotive diesel engine

Apaydin,

Doner

2024

Ain Shams Engineering Journal

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FSI - MRF Coupling Approach For Faster Turbocharger 3D Simulation

Abidin¹,

Morris²,

Miwa³

et al. 2019

SAE Int. J. Adv. & Curr. Prac. in Mobility

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<div class="section abstract"><div class="htmlview paragraph">Fluid-Structure Interaction (FSI) simulation approach can be used to simulate a turbocharger. However, this predictive 3D simulation encounters the challenge of a long computational time. The impeller speed can be above 100,000 rpm, and generally a CFD solver limits the maximum movement of the impeller surface per time step. The maximum movement must be a fraction (~0.3) of the cell length, thus the time step will be very small. A Multiple Reference Frame (MRF) approach can reduce computational time by eliminating the need to regenerate the mesh at each time-step to accommodate the moving geometry. A static local reference zone encompassing the impeller is created and the impact of the impeller movement is modeled via a momentum source. However, the MRF approach is not a predictive simulation because the impeller speed must be given by the User. A new simulation approach was introduced that coupled the FSI and MRF approach. Like in the FSI approach, the total moment of the impeller was calculated based on the resultant force acting over the impeller surface. This calculation was conducted for each time-step and the resulted moment was returned back to the solver to update the MRF zone moment. With this coupling approach, the computational time is similar to the MRF approach while maintaining similar accuracy to the FSI predictive approach. The coupling approach was applied to simulate a turbocharger of 15 L diesel engine. The work done by the turbine on the compressor was adjusted to match the impeller speed with the test data. The calculated pressure upstream from the turbine showed a good agreement with test data. The new approach was also used to guide the design of the exhaust manifold for better turbocharger performance.</div></div>

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Simulation Study of 1D-3D Coupling for Different Exhaust Manifold Geometry on a Turbocharged Gasoline Engine

Cited by 5 publications

References 14 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

Flow analysis in different geometries for optimization of exhaust manifold in a locomotive diesel engine

FSI - MRF Coupling Approach For Faster Turbocharger 3D Simulation

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