Wind Noise Caused by the Side-Mirror and A-Pillar of a Generic Vehicle Model

Hartmann, Michael; Ocker, Joerg; Lemke, Timo; Mutzke, Alexandra; Schwarz, V.; Tokuno, Hironori; Toppinga, Reinier; Unterlechner, Peter; Wickern, Gerhard

doi:10.2514/6.2012-2205

Cited by 68 publications

(58 citation statements)

References 6 publications

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“…Independently from any performance consideration, it has been observed in previous work that this hybrid method greatly improves the quality of the predicted acoustic loading. This is an important point since for automotive side mirror noise it is often found that the acoustic component of the loading on the sideglass is the dominant contributor for interior noise above 1kHz, see for example [6][9][11] [13]. An accurate prediction of the exterior acoustic wall pressure is therefore of primary importance.…”

Section: Fluctuating Surface Pressures Associated With Low Mach Numbementioning

confidence: 99%

“…The method was initially validated on a test case described in detail in [6], which was proposed by a consortium of German automotive manufacturers (Audi, Daimler, Porsche and Volkswagen). It consists of a generic box built in such a way that only the noise transmission through the front side window is relevant -except for very low frequencies.…”

Section: Sae Bodymentioning

confidence: 99%

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Experimental Validation of Aero-Vibro-Acoustic Analysis of Production Vehicles (Invited)

Caro

2015

21st AIAA/CEAS Aeroacoustics Conference

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Section: Fluctuating Surface Pressures Associated With Low Mach Numbementioning

confidence: 99%

Section: Sae Bodymentioning

confidence: 99%

Experimental Validation of Aero-Vibro-Acoustic Analysis of Production Vehicles (Invited)

Caro

2015

21st AIAA/CEAS Aeroacoustics Conference

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“…Comparison of geometry between generic model SAE fullback type 4 (Hartmann et al, 2012) and most passenger cars (Quigley et al, 2001)…”

Section: Tablementioning

confidence: 99%

Wind noise from A-pillar and side view mirror of a realistic generic car model, DriAver

Ali

Jalasabri

Sood

et al. 2018

IJVNV

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Interior noise of a production car is a total contribution mainly from engine, tyres and aerodynamics. At high speed, wind noise can dominate the total interior noise. Wind noise is associated with the unsteadiness of the flow. For most production cars, A-pillar and side view mirror are the regions where the highly separated and turbulent flows are observed. This study quantifies the wind noise contribution from A-pillar and side view mirror with respect to the interior noise of a generic realistic model, DrivAer. The noise sources are obtained numerically from the flow-structure interactions based on the unsteady Reynolds averaged Navier stokes (URANS) while the noise propagation is estimated using Curle's equation of Lighthill acoustic analogy. The sound pressure frequency spectrum of the interior noise is obtained by considering the sound transmission loss from the side glass by using the mass law for transmission loss. The study found that the noise from the A-pillar is higher than the noise from the side view mirror in the whole frequency range. Near the end of the A-pillar component contributes the highest radiated noise level with up to 20 dB louder than that at the front part of the A-pillar.

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“…In [1], the external flow generated sound and its propagation into the interior of a model passenger vehicle was numerically and experimentally investigated. The vehicle model, which is also used in this paper, was a SAE Type 4 car body and was built in such a way that only sound transmission through the front side and only window is allowed.…”

Section: Introductionmentioning

confidence: 99%

A Continuous Adjoint Approach for Vehicle Interior Noise Reduction

Kapellos¹,

Hartmann²

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Abstract. In this paper the continuous adjoint method is developed for a vibroacoustic model that predicts the interior noise of a vehicle induced by the airflow. The model simulates the front side window vibration, excited by the acoustic and hydrodynamic pressure load, and the resulting sound wave propagation into the cabin. Targeting interior noise reduction, the continuous adjoint formulation is used to derive the adjoint to the state equations, namely the bending wave and the wave equations, whilst taking into consideration their coupling. The developed method is applied to a generic vehicle test body for the minimisation of the interior noise.

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Wind Noise Caused by the Side-Mirror and A-Pillar of a Generic Vehicle Model

Cited by 68 publications

References 6 publications

Experimental Validation of Aero-Vibro-Acoustic Analysis of Production Vehicles (Invited)

Experimental Validation of Aero-Vibro-Acoustic Analysis of Production Vehicles (Invited)

Wind noise from A-pillar and side view mirror of a realistic generic car model, DriAver

A Continuous Adjoint Approach for Vehicle Interior Noise Reduction

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