Research and development on no-moving-part valves using enhancement

Kai Shing Yang*, Young Chang Liu, Chi-Chuan Wang, Jin Cherng Shyu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

This study characterizes and analyzes the performances of micro diffusers/nozzles with six types of enhancement structures. The pressure drops across the designed micro nozzles/diffusers are found to be increased considerably when the obstacle and fin structure are added. Further, the micro nozzle/diffuser having added circular area reveals the lowest pressure drop, owing to the hydraulic diameter is increased by circular area and lower interface friction. The maximum improvement of the loss coefficient ratio is about 16 % for an added 3-fin structure operated at a Reynolds number around 70. Upon this situation, the static rectification efficiency improves 4.43 times than the conventional nozzle/diffuser. Experimental results indicate the performance peaks at a Reynolds number around 70, and an appreciable decline is encountered when the Reynolds number is reduced. It is due to the efficiency ratio of conventional micro nozzle/diffuser significant increases with the Reynolds number.

Original languageEnglish
Title of host publicationProceedings of the 7th International Conference on Nanochannels, Microchannels, and Minichannels 2009, ICNMM2009
Pages739-743
Number of pages5
EditionPART A
DOIs
StatePublished - 1 Dec 2009
Event7th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2009 - Pohang, Korea, Republic of
Duration: 22 Jun 200924 Jun 2009

Publication series

NameProceedings of the 7th International Conference on Nanochannels, Microchannels, and Minichannels 2009, ICNMM2009
NumberPART A

Conference

Conference7th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2009
CountryKorea, Republic of
CityPohang
Period22/06/0924/06/09

Keywords

  • Enhancement
  • Micro diffusers/nozzles
  • Pressure drop

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  • Cite this

    Yang, K. S., Liu, Y. C., Wang, C-C., & Shyu, J. C. (2009). Research and development on no-moving-part valves using enhancement. In Proceedings of the 7th International Conference on Nanochannels, Microchannels, and Minichannels 2009, ICNMM2009 (PART A ed., pp. 739-743). (Proceedings of the 7th International Conference on Nanochannels, Microchannels, and Minichannels 2009, ICNMM2009; No. PART A). https://doi.org/10.1115/ICNMM2009-82163