Aero-acoustic predictions of industrial dashboard HVAC systems

Détry, Stéphane; Manera, Julien; Detandt, Yves; d'Udekem, Diego

doi:10.3397/1.3545796

Cited by 5 publications

(5 citation statements)

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“…) show a lower peak at fEXP1 = 100 Hz and an effective vibration value of 92 dB, which is the closest calculated value of the vortex shedding frequency fVS = 99.98 Hz. Frequency f2 (SPL = 162 Hz; vibration = 164 Hz) corresponds to twice the value of the so-called Blade Pass Frequency (BPF) of the tunnel fan (see equation (2)). Measurement of the sound pressure level SPL (Fig.18.…”

Section: Experimental Measurement Of Vibro-acoustic Field For Flow Fimentioning

confidence: 99%

“…A study on intra-vehicle aeroacoustics could include the optimization of the heating, ventilation, and air conditioning (HVAC) of the car itself. Examples of studies on the optimization of the flow of air from the air conditioner, through the cabin and the dashboard spaces, can be the works of S. Détry and J. Manera [2], [3]. From their work, the procedure for acoustic noise measurement and validation of the experimentally obtained data with numerical results are described.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of Aerodynamic and Acoustic Quantities Describing Flow around a Body Placed in a Wind Tunnel

Mahdal

Dobeš²,

Kozubková

2019

Measurement Science Review

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Aerodynamically generated noise affects passenger comfort in cars, high-speed trains, and airplanes, and thus, automobile manufacturers aim for its reduction. Investigation methods of noise and vibration sources can be divided into two groups, i.e. experimental research and mathematical research. Recently, owing to the increase in computing power, research in aerodynamically generated noise (aero-acoustics) is beginning to use modern methods such as computational fluid dynamics or fluid-structure interaction. The mathematical model of turbulent flow is given by the system of partial differential equations, its solution is ambiguous and thus requires verification by physical experiment. The results of numerical methods are affected by the boundary conditions of high quality gained from the actual experiment. This article describes an application of complex measurement methodology in the aerodynamic and acoustic (vibro-acoustic) fields. The first part of the paper is focused on the specification of the experimental equipment, i.e. the wind tunnel, which was significantly upgraded in order to obtain the relevant aerodynamics and vibro-acoustics data. The paper presents specific results from the measurement of the aerodynamic and vibro-acoustic fields.

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Section: Experimental Measurement Of Vibro-acoustic Field For Flow Fimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Measurement of Aerodynamic and Acoustic Quantities Describing Flow around a Body Placed in a Wind Tunnel

Mahdal

Dobeš²,

Kozubková

2019

Measurement Science Review

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“…In the last decade, aero-acoustical simulations for heating, ventilation and airconditioning (HVAC) systems, in particular of passenger cars, were performed in many studies, for example in [1,4,6,12]. These calculations were carried out using acoustic analogies by coupling results obtained with Computational Fluid Dynamics (CFD) software packages like Star-CD [1], ANSYS [4] and OpenFOAM with acoustic models provided by Virtual.Lab and ACTRAN et al (benchmark study see in [2]). These studies have in common that they only consider noise sources located inside air intakes and the propagation into free-space.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Sound Generation and the Sound Propagation from Air Intakes in an Aircraft Cabin

Konstantinov

Wagner

2017

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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The paper presents results of unsteady Reynolds-averaged Navier-Stokes simulations (URANS), Delayed Detached Eddy Simulations (DDES) and Large Eddy Simulations (LES) of the flow and the noise propagation in a segment of the DLR's cabin test facility Do728. Since the weakly compressible Navier-Stokes equations were solved in all cases, spectra of the sound pressure levels (SPL) were analyzed based on Fast Fourier Transforms of the predicted pressure fields. It was shown that LES on hexahedral meshes predict SPLs in good agreement with microphone measurements in the Do728 cabin. A comparison with predictions based on a hybrid approach involving the solution of a wave equation together with non-reflective boundary conditions on the one hand, and a Ffowcs Williams-Hawkings (FW-H) model on the other hand, revealed that the impact of the imperfect acoustic boundary condition in the LES on the sound pressure level at the receiver point is negligible. Thus, it was demonstrated that reliable predictions of SPLs in an aircraft cabin are possible if the corresponding LES can be performed.

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“…Dongkon Lee [2] has studied the impact of air outlet grille on the aero-acoustic noise, indicating that at the range of 200-3000HZ, the noise is main produced by the HVAC System, and angle of air outlet grille influence both the flow-rate distribution and acoustic noise producing. Stéphane Détry [3] has estimated turbulence noise with studying the channel outlet on vehicle dashboard by numerical simulation. The comparison between the simulation and the experiment demonstrates that the simulation can meet the industrial requirements.…”

Section: Introductionmentioning

confidence: 99%

“…Reasonable structure design, especially the air duct will improve the acoustic noise of HVAC System remarkably. Scholars have carried numerical researches on it [1][2][3][4] . Dongkon Lee [2] has studied the impact of air outlet grille on the aero-acoustic noise, indicating that at the range of 200-3000HZ, the noise is main produced by the HVAC System, and angle of air outlet grille influence both the flow-rate distribution and acoustic noise producing.…”

Section: Introductionmentioning

confidence: 99%

Aeroacoustic Noise Analysis of Automobile Air Conditioning System

Li¹,

Guo²,

Guo³

2018

Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)

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Abstract:Acoustic noise of air conditioner is one of the main vehicle interior noises. In this paper, the value of the acoustic noise obtained under specific rotational velocities that tested in the experiment has been analyzed and the distribution of the noise with the analysis of the sound field in the HVAC System (heating ventilation and air-conditioning) also has been achieved. A spectrum analysis of outlet noise was used for comparison of variable noise source characteristics. As soon as the HVAC System modeling and simulation completed in the CDF software, it had laid emphasis to analyze the influence of the inner structures of HVAC System on the acoustic noise and two comparisons were made, one between the simulation and the experiment, the other one between the integrated HVAC system and the simplified in the simulation. Good agreement was achieved between simulation and experiment results.

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Aero-acoustic predictions of industrial dashboard HVAC systems

Cited by 5 publications

References 0 publications

Measurement of Aerodynamic and Acoustic Quantities Describing Flow around a Body Placed in a Wind Tunnel

Measurement of Aerodynamic and Acoustic Quantities Describing Flow around a Body Placed in a Wind Tunnel

Numerical Simulation of the Sound Generation and the Sound Propagation from Air Intakes in an Aircraft Cabin

Aeroacoustic Noise Analysis of Automobile Air Conditioning System

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