American Journal of Optics and Photonics

Volume 2, Issue 2, April 2014

  • Study On Noise Reduction of Nozzle Shock Diamond Flow Destroyed by Flexible Components

    Chung-Hwei Su, Chien-Chih Chen, Yi-Hua Pan, Chen-Ching Ting

    Issue: Volume 2, Issue 2, April 2014
    Pages: 12-17
    Received: Mar. 05, 2014
    Accepted: Apr. 10, 2014
    Published: Apr. 20, 2014
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    Abstract: 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 flexib... Show More
  • Using Color Full-Scale Schlieren (CFSS) Technique to Improve Kitchen Exhaust Hood Performance

    Chung-Hwei Su, Chien-Chih Chen, Li-Yu Yeh, Yu-Cheng Hung, Chen-Ching Ting

    Issue: Volume 2, Issue 2, April 2014
    Pages: 18-23
    Received: Mar. 05, 2014
    Accepted: Apr. 10, 2014
    Published: Apr. 20, 2014
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    Abstract: This article uses color full-scale Schlieren for heat flow visualization of the kitchen exhaust hood. Using grease filters with same percentage of opening but different forms for measurements the heat flow escaping rate, noise, and air velocity of the kitchen exhaust hood under conditions of different percentage masking. The results show that using... Show More