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Experimental and Numerical Simulation of the Effect of the Inlet Valve Shroud and Orientation Angles on Flow Characteristic under Steady Flow Conditions
Technical Paper
2018-01-5039
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
Automotive Technical Papers
Language:
English
Abstract
Air swirl motion inside the engine cylinder improves the air-fuel mixing which
has a great effect on the thermal efficiency, soot formation, and engine
emissions. In this work, experimental and numerical investigations were
performed on a diesel engine cylinder having a configuration of a helical-spiral
inlet port and shrouded valve under steady flow condition. Four shrouded valves
having different shroud angles were used; the shroud angles are 90 deg, 120 deg,
150 deg, and 180 deg. With each shroud angle, four orientation angles were
selected; they are 0 deg, 30 deg, 60 deg, and 90 deg. The experimental and
numerical analyses were performed under a constant vacuum pressure of 350 mm
H2O. In addition, numerical analysis, using the SST
k − ω model, is performed on the engine cylinder using
shrouded valve having shroud angle of 90 deg as a case study. The results showed
that using of shrouded valve decreases the mass flow rate and the discharge
coefficient while it increases the swirl number at all valve shroud and
orientation angles except valve shroud of 180 deg and orientation angle of 90
deg. The numerical simulation analysis showed reasonable agreement with the
experimental work. Therefore, the virtual test rig can be used for studying the
influence of the valve and the port configurations on the flow
characteristics.
Topic
Citation
Abo-Elfadl, S. and Mohamed, A., "Experimental and Numerical Simulation of the Effect of the Inlet Valve Shroud and Orientation Angles on Flow Characteristic under Steady Flow Conditions," SAE Technical Paper 2018-01-5039, 2018, https://doi.org/10.4271/2018-01-5039.Data Sets - Support Documents
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| Unnamed Dataset 1 |
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