Friction factors for flow of near-critical helium in curved tubes

✍ Scribed by D.E. Daney; P.R. Ludtke

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 333 KB
• Volume: 18
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(78)90079-6

✦ Synopsis

Friction factors have been measured for turbulent flow, 1.9(10) 4 < Re < 1. I(10) s, of near critical helium in a helically wound (D/d= 194) circular, 4-mm id tube of high aspect ratio (L/d = 4.6(10)4). These measurements are in close agreement with the classical results of/to for curved pipes. Measured pressure drops in a heated test section with large fluid expansion ratios ( Av/v up to 13) agreed well with calculated pressure drops. Results are also given for a 1.32 mm diameter sharp edge orifice flow meter operating in near~critical helium.