TWO-PHASE FLOW RATES AND PRESSURE DROPS IN CURVED TUBES

Technical Report · Fri Jan 01 04:00:00 EST 1960

OSTI ID:4130207

Foltz, H L

Two-phase flow rates and pressure drops were measured in an electrically heated natural-circulation loop containing two curved copper tubes. The radii of curvature of the two tubes were 1.5 and 3 ft. The flow rates through both tubes first increased, reached a maximum, and then decreased as the heat flux was increased. The flow rate through the long tube reached a marimum at a heat flux of 4500 Btu/ hr-ft/sup 2/. The flow rate through the short tube reached a maximum at a heat flux of 10,000 Btu/hr-ft/sup 2/. Equations developed from a mechanical energy balance were used to calculate two-phase pressure drops. These equations assumed fog flow, or no slip, and no subcooled boiling. Pressure-drop curves, representing different flow rates, were drawn for each tube. The calculated pressure drops range from 1 to 38% lower than the measured values because of the effect of slip and subcooled boiling. (auth)

• Research Organization: Goodyear Atomic Corp., Portsmouth, Ohio
• DOE Contract Number: AT-(33-2)-1
• NSA Number: NSA-15-002733
• OSTI ID: 4130207
• Report Number(s): GAT-T-679
• Country of Publication: United States
• Language: English

Related Subjects

BOILING
CONFIGURATION
COPPER
ENERGY
ENGINEERING AND EQUIPMENT
FLUID FLOW
GAS FLOW
HEAT TREATMENTS
LOSSES
MATHEMATICS
MEASURED VALUES
PRESSURE
SUBCOOLED BOILING
TUBES