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International Journal of Modern Physics and Application

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Study on Nozzle Flow Dispersion for Noise Reduction by Using Micro Color Schlieren Techuique

International Journal of Modern Physics and Application
Vol.1 , No. 1, Publication Date: Jul. 7, 2014, Page: 9-14

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Authors

[1]	Tai-Fa Young , Department of Mechanical and Electromechanical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan.
[2]	Chien-Chih Chen , GraduateInstitute of Mechanical and Electrical Engineering, National Taipei University of Technology, Taipei, Taiwan.
[3]	Yu-Sheng Liang , Institute of Manufacturing Technology, National Taipei University of Technology, Taipei, Taiwan.
[4]	Yi-Hua Pan , Institute of Mechatronic Engineering, National Taipei University of Technology, Taipei, 10608 Taiwan.
[5]	Kuan-Po Huang , Taipei Municipal Jianguo High School, Taipei, Taiwan.
[6]	Chen-Ching Ting , Department of Mechanical Engineering, National Taipei University of Technology, Taipei, Taiwan.

Abstract

This article aims to reduce the nozzle noise by using micro color Schlieren techuique. In general, the high pressure flow running through the nozzle will yield the block flow due to the increasing resistance inside the nozzle tube. The yielded compressed diamond flow is the sound wave which courses extremely large noise. This work used filters on the nozzle to remove the block flow and reduce the noise. Experiments used the annular pore nozzle filters with hole diameters of 1mm、2mm、4mm arranging indifferent forms respectively. The results show that filter with 16holes of diameter 1mm in connection with air pressure of 7kilograms per square centimetre obtained the noise of 70.9dB, which is ca. 26.0% reducing rate.

Keywords

Noise, Micro Color Schlieren, Compressed Diamond , Annular Pore Nozzle

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