A new calibration facility for water flowrate at high Reynolds number

作者：Furuichi Noriyuki^*; Sato Hiroshi; Terao Yoshiya; Takamoto Masaki

来源：Flow Measurement and Instrumentation, 2009, 20(1): 38-47.

DOI：10.1016/j.flowmeasinst.2008.11.001

• Feedwater flowrate
• Thermal output
• Measurement uncertainty
• Ultrasonic flowmeter
• MUR
• Reynolds number

A new test facility has been constructed for the National Metrology Institute of Japan (NMIJ) and the National Institute of Advanced Industrial Science and Technology (AIST) for calibration of feedwater flowmeters used in nuclear power stations at Reynolds numbers of up to 18 million. This very large Reynolds number is achieved in a 600 mm pipe at a flowrate of 3.33 m(3)/s (12,000 m(3)/h) and a water temperature of 70 degrees C. This calibration facility consists of a circulation loop with four pumps and four reference flowmeter sets, a prover system, a heating and cooling unit, and other components. The expanded uncertainty of this facility is 0.077%. The present paper describes, in detail, the new facility, the calibration method of the reference flowmeter, experiments for flow field, uncertainty estimation, and the results of an example calibration.

• 出版日期2009-3