Cross-sectional void fraction distribution measurements in a vertical annulus two-phase flow by high speed X-ray computed tomography and real-time neutron radiography techniques

Conference · Fri Sep 01 04:00:00 EDT 1995

DOI:https://doi.org/10.1016/S0955-5986(99)00008-4· OSTI ID:107013

Harvel, G D ^[1]; Hori, K; Kawanishi, K ^[2]

---

1. McMaster Univ., Ontario (Canada)
2. Combustion and Heat Transfer Lab., Takasago (Japan); and others

A Real-Time Neutron Radiography (RTNR) system and a high speed X-ray Computed tomography (X-CT) system are compared for measurement of two-phase flow. Each system is used to determine the flow regime, and the void fraction distribution in a vertical annulus flow channel. A standard optical video system is also used to observe the flow regime. The annulus flow channel is operated as a bubble column and measurements obtained for gas flow rates from 0.0 to 30.01/min. The flow regimes observed by all three measurement systems through image analysis shows that the two-dimensional void fraction distribution can be obtained. The X-CT system is shown to have a superior temporal resolution capable of resolving the void fraction distribution in an (r,{theta}) plane in 33.0 ms. Void fraction distribution for bubbly flow and slug flow is determined.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (United States). Div. of Systems Technology; American Nuclear Society, La Grange Park, IL (United States); American Inst. of Chemical Engineers, New York, NY (United States); American Society of Mechanical Engineers, New York, NY (United States); Canadian Nuclear Society, Toronto, ON (Canada); Japan Society of Multiphase Flow, Kyoto (Japan)
• OSTI ID: 107013
• Report Number(s): NUREG/CP--0142-Vol.1; CONF-950904--Vol.1; ON: TI95017077
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
42 ENGINEERING
COMPUTERIZED TOMOGRAPHY
DIAGRAMS
DISTRIBUTION
HYDRAULICS
NEUTRON RADIOGRAPHY
PROCEEDINGS
REACTOR SAFETY
SAFETY ANALYSIS
TWO-PHASE FLOW
VOID FRACTION