Orifice meter installation effects in the GRI MRF
- Southwest Research Inst., San Antonio, TX (United States)
Experimental results from the Gas Research Institute (GRI) Metering Research Facility (MRF) are presented on the performance of flow conditioners used to minimize velocity profile distortion and swirl that can cause flow rate measurement errors in orifice meter installations. Orifice meter installations effects tests were performed with several different straightening vane and perforated plate flow conditioner designs in the MRF Interim Low Pressure Loop (ILPL). All tests were performed flowing nitrogen gas at a pressure of 0.72 MPa (105 psia) and a Reynolds number of 9x10{sup 5} through D =102 mm (4 in.) diameter meter tubes. Flow conditioner performance was evaluated for two orifice meter installation configurations. The first was a meter tube with a long upstream length of 45 D installed downstream of a tee used as an elbow. The second was a meter tube with a short upstream length of 17 D installed downstream of two out-of-plane 90{degrees} elbows. Values of orifice discharge coefficient, C{sub d}, were measured as a function of flow conditioner location in the meter tube. Values of orifice coefficient shift, {Delta}C{sub d}, were calculated as the percentage deviation from a baseline (reference) C{sub d} value measured for the long, 45 D upstream length meter tube installed downstream of an oversized Sprenkle flow conditioner. In addition, vertical and horizontal profiles of mean axial velocity and swirl were measured through the upstream orifice flange tap with and without flow conditioners in the short, 17D meter tube downstream of two out-of-plane 90{degrees} elbows.
- OSTI ID:
- 443583
- Report Number(s):
- CONF-950391--
- Country of Publication:
- United States
- Language:
- English
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