Direct aeroacoustics simulation of automotive engine cooling fan system: effect of upstream geometry on broadband noise

2014 ◽  
Author(s):  
Melanie Piellard ◽  
Bruno B. Coutty ◽  
Vincent Le Goff ◽  
Vincent Vidal ◽  
Franck Perot
Keyword(s):  
Broadband Noise ◽  
System Effect ◽  
Automotive Engine ◽  
Engine Cooling ◽  
Cooling Fan

Application of acoustic analogy to automotive engine-cooling fan noise prediction

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 1095-1098 ◽  
Author(s):  
Jeonghan Lee ◽  
Kyungseok Cho ◽  
Soogab Lee
Keyword(s):  
Noise Prediction ◽  
Acoustic Analogy ◽  
Fan Noise ◽  
Automotive Engine ◽  
Engine Cooling ◽  
Cooling Fan

Detailed Study of an Efficient Small Diameter Automotive Engine Cooling Fan System

2003 ◽  
Author(s):  
S. Moreau ◽  
F. Bakir
Keyword(s):  
Small Diameter ◽  
Rapid Prototype ◽  
Efficiency Improvement ◽  
Test Rig ◽  
Cfd Simulations ◽  
Automotive Engine ◽  
Engine Cooling ◽  
Cooling Fan ◽  
Radial Equilibrium

This paper deals with stator efficiency improvement meant for automotive engine cooling fan systems. A new rapid prototype of a long stator designed for a small diameter Valeo rotor (320 mm) has been manufactured and tested on a recently designed Valeo-LEMFI test rig. The following points are presented: • Overall performances of the 320 mm rotor alone. • Overall performances of the 320 mm rotor combined with the new long stator vanes: this study confirms the gain of efficiency foreseen previously with the simplified radial equilibrium code VENTAX. • Steady velocities measured 41 mm downstream of the stage configuration: These measurements obtained by using a 5-hole probe show high deflection carried out by the stators with long chord lengths. Comparisons with preliminary CFD simulations are also shown for both the overall performances and the local velocities.

Efficient Stator Design for Automotive Engine Cooling Fan Systems

2002 ◽  
Author(s):  
F. Bakir ◽  
S. Moreau
Keyword(s):  
Efficiency Improvement ◽  
Test Rig ◽  
Automotive Engine ◽  
Engine Cooling ◽  
Cooling Fan ◽  
Stator Design ◽  
Radial Equilibrium

This paper deals with stator efficiency improvement meant for automotive engine cooling fan systems. Four stators designed for a Valeo 380 mm rotor were manufactured and tested on a newly designed Valeo-Lemfi test rig. The following points are presented: • Overall performances of the 380 mm rotor. • Overall performances of the 380 mm rotor combined with a short chord stator. Inefficiency of such a design is shown: Slight deflection carried out by the stator is the cause of the slight gain of efficiency. • Overall performances of the 380 mm rotor combined to three long chord stators: this study confirms the gain of efficiency foreseen previously with the simplified radial equilibrium code VENTAX. • Steady velocities measured 33 mm downstream the various stage configurations: These measurements obtained by using a 5-holes probe show high deflection carried out by the long chord stators.

CFD Based Design for Automotive Engine Cooling Fan Systems

1998 ◽  
Author(s):  
Éric Coggiola ◽  
Bruno Dessale ◽  
Stéphane Moreau ◽  
Robert Broberg ◽  
Farid Bakir
Keyword(s):  
Automotive Engine ◽  
Engine Cooling ◽  
Cooling Fan

Aeroacoustic Characteristics of Efficient Automotive Engine Cooling Fan Systems

Volume 1 ◽  
2004 ◽  
Author(s):  
S. Moreau ◽  
F. Bakir
Keyword(s):  
Test Facility ◽  
Flow Conditions ◽  
Efficiency Gains ◽  
Flow Rates ◽  
Automotive Engine ◽  
Engine Cooling ◽  
Cooling Fan ◽  
Percentage Points ◽  
Additional Noise ◽  
Definition Of

Recent studies on automotive engine cooling fan systems carried out in partnership between LEMFI and Valeo have led to the definition of a range of efficient stator designs. It was shown that an adequate rotor-stator coupling could yield significant efficiency gains over the whole range of Valeo fans with diameters ranging from 280 mm to 460 mm. Efficiency gains ranging from 12 percentage points for the 350 mm fan diameter to 2 points for the 460 mm were estimated by using a simplified radial equilibrium design (SRE). These predictions have been verified experimentally by recent designs for various fan system diameters. The present study then describes a newly developed aeroacoustic test facility dedicated to automotive fan systems. The influence of the rotor-stator coupling is then shown by comparing the rotor alone and rotor-stator configurations, not only on the overall performances and velocity fields at the system outlet measured by a 5-hole probe, but also on the noise generated by the fan systems for various flow conditions. At the nominal flow rate, the efficient stators are shown to bring little or no extra noise if the number of stators and the rotor-distance are carefully chosen. At other flow rates, additional noise might be expected.

Application of Acoustic Analogy to Automotive Engine-Cooling Fan Noise Prediction

AIAA Journal ◽  
2000 ◽  
Vol 38 (6) ◽  
pp. 1095-1098 ◽  
Author(s):  
Jeonghan Lee ◽  
Kyungseok Cho ◽  
Soogab Lee
Keyword(s):  
Noise Prediction ◽  
Acoustic Analogy ◽  
Fan Noise ◽  
Automotive Engine ◽  
Engine Cooling ◽  
Cooling Fan

Influence of blade compactness and segmentation strategy on tonal noise prediction of an automotive engine cooling fan

2013 ◽  
Vol 74 (5) ◽  
pp. 782-787 ◽  
Author(s):  
E. Tannoury ◽  
S. Khelladi ◽  
B. Demory ◽  
M. Henner ◽  
F. Bakir
Keyword(s):  
Noise Prediction ◽  
Tonal Noise ◽  
Automotive Engine ◽  
Engine Cooling ◽  
Segmentation Strategy ◽  
Cooling Fan

Detailed 3D Rotor-Stator Interaction in Automotive Engine Cooling Fan Systems

2003 ◽  
Author(s):  
M. Henner ◽  
S. Moreau
Keyword(s):  
Tonal Noise ◽  
Similar System ◽  
Automotive Engine ◽  
Engine Cooling ◽  
Cooling Fan ◽  
Noise Data ◽  
Rotor Stator Interaction ◽  
Unsteady Interaction ◽  
Time Parameters

In order to address the interaction of the automotive engine cooling fan with its system environment, the unsteady interaction of the fan blades with its support struts or stator vanes is presently studied. The resulting unsteady sources are consequently used to predict the tonal noise of such systems. Preliminary detailed 2D unsteady simulations at a given mean radius have helped testing the necessary numerical spatial and time parameters. A newly developed acoustic post-processing code RSF based on the Acoustical Analogy for both Rotor and Stator blades in the Frequency domain, has then been used to compute the fan system tones. An initial coarse 3D simulation has stressed the crucial role of the spatial resolution and had motivated the consequent refined simulation of the complete reference fan system, for which the main features and preliminary results are highlighted here. A first comparison with experimental noise data on a similar system also suggests a partial contribution of this mechanism to the spectral tones.

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