Prediction of External Flow Acoustic Impact on In-cab Noise
Purpose and goal
The purpose of this project was to build up knowledge and computer models on how wind noise is generated in a truck. This is of importance since the largest contributor to the interior noise is wind noise. This is of importance from a safety point of view since high noise can lead to fatigue and head aches and give us dangerous truck drivers.
Expected results and effects
The results show that the computer model is reliable and can be used to rank different concepts to how much noise they generate. This is important since it will be possible to evaluate different concepts in early stages. This will lead to safer driver environments and less development costs.
Planned approach and implementation
We have used simplified models to build up a methodology which has then been applied on a real truck. Measurements were made on a real truck and the results correlate well to the simulations. Chalmers contribution to this project has been to develop a methodology based on a simplified geometry. This methodology was then applied on a real truck and the results were compared to measurements.