| Autor: |
Dominic Hii, Zaidi Mohd Ripin, Ummi Masyitah Mohd Fisol, Mohd Khairul Rabani Hashim, Huoy Thyng Yow, Chan Ping Yi, Cheah Heng Tan, Norilmi Amilia Ismail, Anderson Saw, A.A. Saad |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
The Journal of the Acoustical Society of America. 134:4222-4222 |
| ISSN: |
0001-4966 |
| DOI: |
10.1121/1.4831505 |
| Popis: |
The problem with wind induced noise exists in any electronic device used in the outdoor that incorporates microphone components mounted underneath small opened cavities within its body. Due to the complexity nature of the problem, efforts in trying to experimentally understand the flow induced noise problem has lengthened product development cycle time. In this paper, a CFD approach using the SST k-omega turbulence model were utilized as an initial model to assist in understanding the phenomenon. Several instances of experimentation using actual prototype models were conducted for the correlation study. The experimentally perceived noise from the output of the microphone was found to be fundamentally correlated to the numerical analysis as evidenced from the flow velocity vectors, profiles, and vortex core inside the cavity region. It is also shown that by following the principle of nonlinear theory of cavity resonances and Rossiter’s Theory, the understanding of the phenomenon can be further strengthened. Some inaccuracies in the numerical results stems largely from the choice of turbulence model and meshing configurations. Future work and activities required to extend and improve the current work were suggested at the end of this document. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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