Investigation of the Buoyancy Driven Flow in a Simplified Underhood - Part II, Numerical Study

Chen, Kuo Huey; Johnson, Jim; Merati, Parviz; Cooper, Nathan; Leong, C. H.

doi:10.4271/2006-01-1607

Cited by 10 publications

(2 citation statements)

References 2 publications

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“…Simplified set-ups have been successfully used to validate simulation methods for the thermal soak condition. [5][6][7] Using these simplified set-ups instead of a full-scale vehicle improves the accessibility to an area of interest and provides better control of the boundary conditions. As thermal soak is a phenomenon that only occurs when the vehicle has come to a stand still and the fan is switched off, the inlet openings and the fan are often excluded or do not play a role in the validation process.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the air flow in a simplified underhood environment

Franzke

Sebben

Willeson

2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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In this paper, a simplified underhood environment is proposed to investigate the air flow distribution in a vehicle-like set-up and provide high quality measurement data that can be used for the validation of Computational Fluid Dynamic methods. The rig can be equipped with two types of front openings representative for electrified vehicles. Furthermore, it is possible to install differently shaped blockages downstream of the fan to imitate large underhood components. The distance between the blockages and the fan can be varied in longitudinal and lateral direction. The measurements are performed with Laser Doppler Anemometry at a fixed distance downstream of the fan. The results show that the lack of an upper grille opening in the configuration for a battery electric vehicle has a notable impact on the flow field in the reference case without any downstream blockage. However, the differences in the flow field between the two front designs become less when a downstream obstruction is present. The longitudinal and lateral position of the blockages have a minor impact on the flow field compared to the shape of the obstacle itself.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation of the air flow in a simplified underhood environment

Franzke

Sebben

Willeson

2021

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

“…Numerical simulations appear to be an appropriate means to satisfy these requirements and have the potential to reduce the amount of prototypes [23]. These numerical simulations concern mainly the investigation of the thermal soak phase of a vehicle where the flow is buoyancy driven [24,25], the underhood compartment thermal management of passenger cars and trucks [26], the exhaust system during cold start emissions [27], diesel engine with a dual-loop Exhaust Gas Recirculation EGR system [28], the airflow over a radiator and convex and concave tubes [29,30] and vehicle suspension system [31]. However, the simulation means need to be validated by experimentally using prototypes [32,33] and real vehicles [34,35].…”

Section: Introductionmentioning

confidence: 99%