Pulsation effects on single- and two-rotor turbine meters
| Autor: | R.J. McKee |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Accuracy and precision
Rotor (electric) Acoustics Turbine Computer Science Applications Volumetric flow rate law.invention Amplitude law Modeling and Simulation Modulation (music) Astrophysics::Solar and Stellar Astrophysics Environmental science Metre Mean flow Electrical and Electronic Engineering Instrumentation Simulation |
| Zdroj: | Flow Measurement and Instrumentation. 3:151-166 |
| ISSN: | 0955-5986 |
| DOI: | 10.1016/0955-5986(92)90031-y |
| Popis: | The natural gas industry is particularly in need of a technology and a method which will assis tin identifying pulsation-related problems at field measurement sites. This paper describes results of a research programme sponsored by the Gas Research Institute (GRI) which has investigated the response of single- and two-rotor turbine meters to pulsations and has identified a practical diagnostic technique which may meet industry's needs. Both single- and two-rotor turbine meters have been tested in the GRI Meeting Research Facility (MRF) in pulsating flow over a range of frequencies and amplitudes typical of those seen in gas industry applications. The pulsation frequencies and amplitudes cover the normal field conditions with velocity modulations from a few to 20% of the mean flow rate. Flow rates investigated in the 100 mm test meters include from 15% to nearly 100% of the meter's capacity. Test results show that pulsation modes which produce a strong velocity modulation at the meter have the most influence on measurement accuracy, while pressure pulsation amplitude at the meter has little influence. Furthermore, results show that pulsations which influence meter registration also affect rotor speed in a detectable manner. It has been demonstrated that by monitoring modulation of the time period between turbine rotor pulses, a measurement can be derived to detect the presence of pulsations and identify the frequency and, potentially, the amplitude of pulsation-induced errors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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