WAKE FLOW - ACOUSTIC RESONANCE IN A GENERIC AIR OUTLET

Asvath Ravichandran, Michael Manhart, Florian Schwertfirm, Nikolaus Peller

Research output: Contribution to conferencePaperpeer-review

Abstract

We aim to investigate the noise generation mechanism in a generic geometry representing a typical air outlet of an HVAC system of a car. We use an Aero-Acoustic simulation based on Large-Eddy Simulation and an experiment to study the interaction between a throttle plate (used to control the flow rate) and fins (used to guide the flow). We can identify several sound generation mechanisms, of which the so-called Parker β-mode is the most prominent in the sensible frequency range. Our focus is on the interaction and resonance of this acoustic mode with the vortex shedding modes in the wake of the throttle valve, which seems to play a major role in determining the amplitude of the acoustic mode.

Original languageEnglish
StatePublished - 2022
Event12th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2022 - Osaka, Virtual, Japan
Duration: 19 Jul 202222 Jul 2022

Conference

Conference12th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2022
Country/TerritoryJapan
CityOsaka, Virtual
Period19/07/2222/07/22

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