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Further Investigation of Discharge Coefficient for PTC 6 Flow Nozzle in High Reynolds Number

[+] Author Affiliations
Noriyuki Furuichi, Yoshiya Terao

AIST, NMIJ, Tsukuba, Japan

Shinichi Nakao

Flow Col, Yokohama, Japan

Keiji Fujita, Kazuo Shibuya

Flow Engineering, Yokohama, Japan

Paper No. POWER2015-49174, pp. V001T05A002; 9 pages
  • ASME 2015 Power Conference collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum
  • ASME 2015 Power Conference
  • San Diego, California, USA, June 28–July 2, 2015
  • Conference Sponsors: Power Division
  • ISBN: 978-0-7918-5660-4
  • Copyright © 2015 by ASME


The discharge coefficients of the throat tap flow nozzle based on ASME PTC 6 are measured in wide Reynolds number range from Red=5.8×104 to Red=1.4×107. The nominal discharge coefficient (the discharge coefficient without tap) is determined from the discharge coefficients measured for different tap diameters. The tap effects are correctly obtained by subtracting the nominal discharge coefficient from the discharge coefficient measured. Finally, by combing the nominal discharge coefficient and the tap effect determined in three flow regions, that is, laminar, transitional and turbulent flow region, the new equations of the discharge coefficient are proposed in three flow regions.

Copyright © 2015 by ASME



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