대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제25권12호
  • /
  • Pages.1898-1904
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  • 2001
  • /
  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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소닉노즐의 유량측정 불확도 평가

Evaluation of Flow Measurement Uncertainty of Sonic Nozzle

  • 최해만 (한국표준과학연구원, 유체유동그룹) ;
  • 박경암 (한국표준과학연구원, 유체유동그룹) ;
  • 최용문 (한국표준과학연구원, 유체유동그룹)
  • 발행 : 2001.12.01
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초록

Measurement uncertainty should be evaluated according to ISO/IEC 17025. In Flow measurement area, uncertainty evaluation scheme was applied to the reference flow meter, sonic nozzle. Uncertainty was calculated by evaluating various uncertainty factors affected in flow measurement. The expanded uncertainty(U) of the sonic nozzle was 2.1$\times$ 10$^{-3}$ (confidence level of 95 %). This evaluation example will be useful in flow measurement uncertainty determination of other flow meters.

키워드

참고문헌

  1. ISO/IEC 17025, 1999, 'General requirement for the competence of testing and calibration laboratory,' ISO
  2. ISO Guide 25, 1993, 'Guide to the Expression of Uncertainty in Measurement,' ISO
  3. 측정불확도 표현지침, 1998, KRISS-98-096SP, KRISS
  4. ISO 9300, 1993, 'Measurement of gas flow by means of critical flow venturi nozzles,' ISO
  5. 최해만, 박경암, 최용문, 오연균, 1997, '음속노즐을 이용한 기체유량 측정시스템 개발,' KRISS-97- I06-IR, KRISS
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  9. Choi, Y. M., Park, K - A. and Park, S. O., 1997, 'Interference Effect Between Sonic Nozzles,' Flow Meas. Instrum., Vol. 8, No.2, pp. 113-119 https://doi.org/10.1016/S0955-5986(97)00024-1
  10. R. C. Johnson, 1965, 'Real-Gas Effects in Critical Flow Through Nozzles and Tabulated Thermodynamic Properties,' NASA TN D-2565, NASA Lewis Research Center
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  12. L. Olson and G. P. Baumarten, 1971, 'Gas Flow Measurement by Collection Time and Density in a Control Volume, Flow ; Its Measurement and Control in Science and Industry,' Vol. 1, Parts 3, edited by W. E. Vamah and H. Wyland, ISA 1971, pp. 1287-1295