DETERMINATION OF TIME-DEPENDENT VOID FRACTION DISTRIBUTION IN BUBBLY 2-PHASE FLOW BY A REAL-TIME NEUTRON RADIOGRAPHY TECHNIQUE

被引：11

作者：

HARVEL, GD ^{[1
]}

CHANG, JS ^{[1
]}

KRISHNAN, VS ^{[1
]}

机构：

[1] ATOM ENERGY CANADA LTD,CANDU,SAFETY ANAL BRANCH,MISSISSAUGA,ON L5K 1B2,CANADA

来源：

NUCLEAR TECHNOLOGY | 1995年 / 109卷 / 01期

关键词：

VOID FRACTION DISTRIBUTION; REAL-TIME NEUTRON RADIOGRAPHY; BUBBLY FLOW;

D O I：

10.13182/NT95-A35073

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Radiographic images generated by the real-time neutron radiography system (RTNR) are analyzed by customized image processing software for the determination of instantaneous void fraction distribution. The cross-sectional averaged axial void fraction profiles and the two-dimensional void fraction profiles are determined simultaneously for each image. Various flow regimes are generated to determine if the RTNR system can accurately predict the void distribution in the radial, axial, and temporal coordinates. The results show the RTNR system correctly determines the void fraction distribution for each flow regime; however, accuracy decreases with decreasing void fraction. For net water thicknesses > 1.0 cm, the accuracy decreases with increasing water thickness due to the extreme sensitivity of thermal neutron interactions with light water. Heavy water is a more suitable fluid than light water for void fraction measurements in large-diameter flow systems.

引用

页码：132 / 141

页数：10

共 14 条

[1]

ARFKEN G, 1985, MATH METHODS PHYS, P875

[2]

Chang J. S., 1989, Fourth International Topical Meeting on Nuclear Reactor Thermal-Hydraulics. NURETH-4, P413

[3] DETERMINATION OF GAS-LIQUID BUBBLE COLUMN INSTANTANEOUS INTERFACIAL AREA AND VOID FRACTION BY A REAL-TIME NEUTRON RADIOGRAPHY METHOD [J].

CHANG, JS ;

HARVEL, GD .

CHEMICAL ENGINEERING SCIENCE, 1992, 47 (13-14) :3639-3646

[4]

CHANG JS, 1990, NUCL ENG DES, V122, P143

[5]

DANCE WE, 1986, NEUTRON RADIOGRAPHY, V2, P415

[6]

FAIRHOLM WH, 1991, 1991 P NAT HEAT TRAN, P199

[7] DIGITAL PROCESSING TO IMPROVE IMAGE QUALITY IN REAL-TIME NEUTRON RADIOGRAPHY [J].

FUJINE, S ;

YONEDA, K ;

KANDA, K .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1985, 228 (2-3) :541-548

[8]

HARMS AA, 1986, MATH PHYSICS NEUTRON

[9]

HARVEL GD, 1990, 6TH P MIAM INT HEAT

[10]

Mishima K., 1989, Annual Reports of the Research Reactor Institute, Kyoto University, V22, P133

← 1 2 →