Study On Noise Reduction of Nozzle Shock Diamond Flow Destroyed by Flexible Components
American Journal of Optics and Photonics
Volume 2, Issue 2, April 2014, Pages: 12-17
Received: Mar. 5, 2014;
Accepted: Apr. 10, 2014;
Published: Apr. 20, 2014
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Chung-Hwei Su, Department of Safety, Health and Environmental Engineering, National Kaohsiung First University of Science and Technology, Taiwan
Chien-Chih Chen, GraduateInstituteof Mechanical and Electrical Engineering, National Taipei University of Technology, Taipei, 10608 Taiwan
Yi-Hua Pan, Institute of Mechatronic Engineering, National Taipei University of Technology, Taipei, 10608 Taiwan
Chen-Ching Ting, Department of Mechanical Engineering, National Taipei University of Technology, Taipei, 10608 Taiwan
It's well known that the high pressure flow running through the nozzle yields shock diamond flow which mainly causes the noise. This work employed flexible components on the nozzle outlet to destroy shock diamond flow and using micro color schlieren technique to visual the dispersion shock diamond. Experiments adjusted conditions of and mesh flexible components for optimal design. The results show that wire diameter 0.5mm of cross flexible component, away from nozzle 0.5cm and 1cm received the noise of 83.8dB, the reducing rate was ca.12.5%. The mesh 100 flexible component away from nozzle 0.5cm received the noise of 75.6dB, the reducing rate was ca. 21.17%.
Study On Noise Reduction of Nozzle Shock Diamond Flow Destroyed by Flexible Components, American Journal of Optics and Photonics.
Vol. 2, No. 2,
2014, pp. 12-17.
K. Lim and C. Lee, “A numerical study on the characteristics of flow field, temperature and concentration distribution according to changing the shape of separation plate of kitchen hood system,” Energy and Buildings, vol. 40, 2008, pp. 175-184.
Y. Li and A. Delsante, “Derivation of capture efficiency of kitchen range hoods in a confined space,” Building and Environmental, vol. 31, no. 5, 1996, pp. 461-468.
T. J. Liu and M. S. Young, “Eliminating contaminants with a piezoelectric transducer in the design of low-cost smart kitchen range hoods,” IEEE Sensors Journal, vol. 2, no.4, 2002, pp. 314-321.
J. Abanto and M. Reggio, “Numerical investigation of the flow in a kitchen hood system,” it Building and Environment, vol. 41, 2006, pp. 288-296.
C. M. Chiang, C. M. Lai, P. C. Chou and Y. Y. Li, “The influence of an architectural design alternative (transoms) on indoor air environment in conventional kitchens in taiwan,” Building and Environment, vol. 35, 2000, pp. 579-585.
Q.F. Lin, “Design and application of “industrial ventilation,” Environmental Progress, vol. 56, 2002.
E. Gonzalez, F. Marzal, A. Minana and M. Doval, “Influence of exhaust hood geometry on the capture efficiency of lateral exhaust and push-pull ventilation systems in surface treatment tanks,” Environmental Progress, vol. 27, 2008, pp. 405-411.
B. Lishman and A. W. Woods, “The effect of gradual changes in wind speed or heat load on natural ventilation in athermally massive building,” Building and Environment, vol. 44, 2009, pp. 762-772.
N. T. Chen, C. C. Chiang, C. P. T. Chou, Y. P. Lin and Z. L. Chen, “Bedroom opening fitted vertical louvers on the impact of indoor natural ventilation,” Architectural Journal,61, 2007, pp.63-78.
Q. Q. Chen, “Kitchen transom hole high rate of carbon dioxide concentration field and the effect of ventilation rate,” Master's thesis, National Cheng Kung University, Tainan, 2000.
H. Y. Chen, “Theory of design exclusion pollution in plant,” Master's thesis, Department of Refrigeration, Air Conditioning and Energy Engineering, Tainan, 2007.
Z. X. Ma, “Blowing suction Industrial Ventilation hood numerical simulation of turbulent diffusion,” master's thesis, Department of Mechanical Engineering, National Taiwan University of Technology, Taipei, 2005.
W. X. Yuan, “Industrial Ventilationto improve air quality operating environment easy way” Environmental Progress,vol.12, 1995.
J. H. Cheung, “Industrial Ventilationoperating environmental control of the weapon,” Environmental Progress, vol.12, 1995.
G. S. Settles, “Color schlieren optical-a review of techniques and application,” Prinseton University, Prinseton, 1982.
G.E.A. Meier, W.C. Selerowicz, and A.P. Szumowski, “A nozzle generating low jet noise,” Journnl of Sound and Vibration,” vol. 136, no. l, 1990, pp. 65-73.
C.C. Chen and C.C. Ting, “Investigating the effect of color mask on sensitivity for the color schlieren imaging,” International Journal of Engineering and Technology Innovation, vol.3, no. 2 , 2013, pp. 114-122.
C.C. Ting and C.C. Chen, “Detection of Gas Leakage Using Micro Color Schlieren Technique,” Measurement, vol. 46, 2013, pp. 2467-2472.
Chinese National Standard, CNS 3805.