With the advent of quieter powertrain and improved cabin acoustic sealing, there is an increased focus on noise generated in the HVAC unit and climate control ducting system. With improved insulation from exterior noise sources such as wind & road noise, HVAC noise is more perceptible by the occupants and is a key quality indicator for new generation vehicles. This has increased the use of simulations tools to predict HVAC noise during the virtual development phase of new vehicle programs. With packaging space being premium under the instrument panel, changes to address noise issues are expensive and often impractical. The current methodology includes the best practices in simulation accumulated from prior aero acoustics validation studies on fans, ducts, flaps and plenum volume discharge. The paper details the acoustic noise generation and propagation in the near field downstream of an automotive HVAC unit in conjunction with ducting system. The simulation process is based on Detached Eddy Simulation (DES) with compressibility. The overall sound pressure level at a nearfield cabin location is compared with test data. Good agreement was achieved between simulation and test results.
Prediction of HVAC System Aero/Acoustic Noise Generation and Propagation using CFD
Sae Technical Papers
SAE 2013 World Congress & Exhibition ; 2013
08.04.2013
Aufsatz (Konferenz)
Englisch
Prediction of HVAC System Aero/Acoustic Noise Generation and Propagation using CFD
British Library Conference Proceedings | 2013
|British Library Conference Proceedings | 2021
|Studies on aero-acoustic noise prediction of MAC unit using computational modelling
Kraftfahrwesen | 2016
|HVAC Noise Prediction Using Lighthill Wave Method
SAE Technical Papers | 2023
|HVAC System Noise Prediction through CFD Simulation
British Library Conference Proceedings | 2019
|