Experimental study on the effect of different components collocations on flow of automotive cooling fan

Wen, Shizhu; Hao, Yuwei; Zhang, Zhixuan; Wang, Yifei

doi:10.1177/0954407019840959

Cited by 3 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 2011, [7] referred to the influence of the shroud position on the automotive cooling fan: the relative position between the fan and the conveyor was a critical design aspect, as the fan ducting into the shroud conveyor directly influenced the performance of the heat exchanger. The influence of the cooling system's component position on a flow field of a cooling fan was also studied [8].…”

Section: Introductionmentioning

confidence: 99%

CFD Methodology for an Underhood Analysis towards the Optimum Fan Position in a Compact Off-Road Machine

2023

View full text Add to dashboard Cite

A compact off-road machine tends to have a compact engine structure, which may result in small clearances between the main engine, the cooling system, and the radiator. In the design of its cooling system, the heat exchanger, fan, and conveyor are normally chosen based on their fixed operating point. Unfortunately, these machines work in variable conditions and the performance of each component is different when they are working as a whole under the hood. The aim of this work is to optimize the position of these components through a parametric analysis of some variables, using the Computational Fluid Dynamics technique. The air flows are analyzed in order to show the pressure waves created by the air moved by the fan blades, showing how the fluid interacts with the engine. The results show that optimizing this installation can increase the efficiency of the fan by 10% and reduce the noise emitted by 13 dB. These results should sensitize designers to use CFD analyses, not for a single component, but for the entire system. The methodology shown can be applied for the better design of cooling systems, mainly in off-road vehicles that have noise emission problems.

show abstract

Section: Introductionmentioning

confidence: 99%

CFD Methodology for an Underhood Analysis towards the Optimum Fan Position in a Compact Off-Road Machine

2023

View full text Add to dashboard Cite

show abstract

“…For flow field investigations downstream of an axial cooling fan, plenum rigs are commonly used, since they also allow for testing at different operating points along the fan performance curve. 8,9 However, the similarities to a vehicle installation are small, as these set-ups rarely include any upstream obstacles or peripheral restrictions in the downstream section. Khaled et al 10 propose a simplified engine bay rig to perform flow field investigations in a more vehicle-like environment and present results from both Laser Doppler Anemometry (LDA) and Particle Image Velocimetry (PIV) measurements.…”

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

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.

show abstract

“…Currently, there are many potential solutions to reduce the noise of cooling fans. Traditional research has mainly focused on changes to the fan hub ratio, blade profile, blade installation angle, and blade number 1,2 as outlined below.…”

Section: Introductionmentioning

confidence: 99%

Noise reduction of automobile cooling fan based on bio-inspired design

Wang

Li-xia

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

This study aims to minimize the noise generated by automobile cooling fans. Fan blade structures with ridged surfaces based on bio-inspired principles are 3D printed and used to replace the conventional fan blades. The effect of the bio-inspired ridge structures on the noise reduction of the cooling fan is demonstrated by orthogonal experiments in a semi-anechoic chamber. Experimental results show that with an increase in the rotational speed, the effect of the surface textures on the acoustic performance of the cooling fan becomes more significant. For example, at a fan speed of 1750 r/min, all the bio-inspired blade designs reduce noise compared with the original fan and, in particular, the sound pressure level is reduced by 3.83 dB(A) for the design with a ridge width of 4 mm and a ridge pitch of 15 mm. Through variance analysis of the measured noise, the ridge pitch distance has the most significant impact on noise reduction under low speed conditions whilst, under high speed conditions, the ridge width has the most significant influence. In addition to the experimental studies, computational fluid dynamics (CFD) simulations of the cooling fan are carried out to explain the mechanism of noise reduction for the ridged fan blades. When the fan runs, the horseshoe vortexes generated by the ridge structures disturb the flow of the boundary layer, reduce the influence of the fluid flow on the boundary layer, and delay the transition of the fan blade laminar flow to turbulence. It is also seen that there is a reduction of the intensity of the fan blade trailing edge vortices and the scale of the secondary vortices, thereby achieving the overall aim of noise reduction. This research has significance in the noise reduction design of automobile cooling fans.

show abstract

Experimental study on the effect of different components collocations on flow of automotive cooling fan

Cited by 3 publications

References 15 publications

CFD Methodology for an Underhood Analysis towards the Optimum Fan Position in a Compact Off-Road Machine

CFD Methodology for an Underhood Analysis towards the Optimum Fan Position in a Compact Off-Road Machine

Experimental investigation of the air flow in a simplified underhood environment

Noise reduction of automobile cooling fan based on bio-inspired design

Contact Info

Product

Resources

About