کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5001892 | 1461086 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comparison of high temperature and high Reynolds number water flows between PTB and NMIJ
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
کنترل و سیستم های مهندسی
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چکیده انگلیسی
Bi-comparison for high temperature and high Reynolds number water flows was performed between Physikalische-Technische Bundesanstalt (PTB) and National Metrology Institute of Japan (NMIJ) using differential pressure meters. The flowrate range considered herein was from 250 m3/h to 740 m3/h and the temperature range was from 20 °C to 80 °C. The Reynolds number based on the pipe diameter ranges from 4.4Ã105 to 3.6Ã106. The expanded uncertainty of volumetric flowrate with a coverage factor k=2 is 0.040% for PTB and 0.070% for NMIJ. The differential pressure meters as the transfer meter were a throat-tapped flow nozzle and an orifice. The results for both flow meters were in good agreement between the two labs. The difference in the average discharge coefficient at the same Reynolds number ranged from â0.05% to 0.03% for the flow nozzle and from â0.01% to 0.05% for the orifice. The results of the comparison indicate a high level of consistency between PTB and NMIJ for high temperature and high Reynolds number water flows.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Flow Measurement and Instrumentation - Volume 52, December 2016, Pages 157-162
Journal: Flow Measurement and Instrumentation - Volume 52, December 2016, Pages 157-162
نویسندگان
Noriyuki Furuichi, Leopoldo Cordova, Thomas Lederer, Yoshiya Terao,