The effects of an upstream short radius elbow and pressure tap location on orifice discharge coefficients
✍ Scribed by John C. Branch
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 744 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0955-5986
No coin nor oath required. For personal study only.
✦ Synopsis
The effects of a single, short radius (r/D = 0.667) upstream elbow on the discharge coefficient of three orifice plates of /3 = 0.438, 0.528 and 0.688 are investigated.
Discharge coefficients were determined for all three orifices utilizing pressure taps in the 0" (inside the bend), 90" (normal to the bend) and 180" (outside the bend) radial locations at elbow-to-orifice spacings (LID) of 3, 10, 17 and 25. The upstream tap was located one pipe diameter (0 and the downstream tap was located l/2 pipe diameter (D/2) from the upstream orifice plate face. The pipe tested was 38.1 mm ID and the test fluid was water at ambient conditions.
The flow regime covered was 0.7 x lo5 5 R, C= 1.2 x 105, where R, is based on the pipe diameter. The results were output in the form of percentage of change of the discharge coefficient.