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Intake Manifold Whistle Suppression in a Product Development Environment
Technical Paper
2004-01-0395
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
An intake manifold produced a distinct whistle noise in a vehicle while driving through high torque conditions. The diagnostic tests in a steady air flow test bench helped reveal that the whistle was occurring due to the shear layer instabilities in the air flow over the sump cavity in the intake manifold which acts as an Helmoltz-like resonator. Joint time-frequency domain signal analysis was applied to detect the peak whistle. A sharp radius and a ramp at the upstream edge of the sump cavity reduced the peak whistle sound pressure level from 106dB to 85dB in the air flow bench and made the whistle inaudible in the vehicle. Tolerance study was performed on this geometry to allow manufacturing variations. A test method, using rapid prototype parts, has been developed in order to identify whistles early in the design cycle.
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Citation
Kannan, V., Seifert, J., Golletti, T., and Hanner, D., "Intake Manifold Whistle Suppression in a Product Development Environment," SAE Technical Paper 2004-01-0395, 2004, https://doi.org/10.4271/2004-01-0395.Also In
SAE 2004 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V113-6; Published: 2005-07-05
Number: V113-6; Published: 2005-07-05
References
- SF-1020 Flowbench Operator's Manual SuperFlow Corporation Colorado Springs, CO 1996
- Dequand et al Helmoltz-Like Resonator Self-Sustained Oscillations, Part I - Acoustical Measurements and Analytical Models AIAA Journal 41 3 408 415 2003
- Dequand et al Helmoltz-Like Resonator Self-Sustained Oscillations, Part II - Detailed Flow Measurements and Numerical Simulations AIAA Journal 41 3 416 423 2003
- Ziada, S. “A flow visualization study of flow-acoustic coupling at the mouth of a resonant side-branch,” Flow Induced Vibration and Fluid Structure Interaction 258 35 59 1993
- Elder et al Mechanisms of flow-excited cavity tones at low Mach number J. Acoustic Society of America 72 2 532 549 1982
- Selamet A. Kurniawan D. Knotts B.D. Novak J.M. “Whistles with a generic sidebranch: production and suppression,” Journal of Sound & Vibration 250 277 298 2002
- Selamet A. Kurniawan D. Knotts B.D. Novak J.M. “Study of whistles with a generic sidebranch,” SAE Paper 1999-01-1814 1999
- Tritton D. J. Physical Fluid Dynamics 2nd 267 294 Oxford University Press 1988
- Qian Chen Joint Time-Frequency Analysis - Methods and Applications, Chapter 1 Prentice-Hall NJ 1996