Measurement of distribution of local void fraction in two-phase flow by x-ray computed tomography
- 1. Toshiba Corp., Kawasaki, Kanagawa (Japan)
Description
A new X-ray CT scanner system, using time-averaged projection data (X-ray beam intensity), called Advanced Computed Tomography System (ACTS), was developed for measuring accurately the local void fraction distribution in the two-phase flow of various flow configurations and patterns. A horizontal circular tube and a 4 x 4 rod bundle were used as test sections. Air-water mixtures were used as test fluids. The local void distribution measured by ACTS and that measured by an impedance probe were compared. The agreement was excellent for tested flow patterns (bubbly flow, slug flow, plug flow and annular flow) both in the horizontal tube and in the 4 x 4 rod bundle. It was concluded that ACTS can be applied to the measurement of local void distribution in any flow patterns and in any flow channel configurations. (author)
Availability note (English)
Available from DOI: https://doi.org/10.3327/jaesj.26.421Abstract (Japanese)
著者らは、CTスキャナのボイド率測定への適用性を明らかにしようという観点から、前報においてX線CTスキャナにより空気-水系の水平二相流のボイド率分布を測定し、CTによって流動様式の判別は可能であり、層状流、環状流、気泡流などの局所ボイド率の変動(以下、単に変動という)の小さい流れでは、CTスキャナによって局所ボイド率分布測定が可能であるが、スラグ流のような変動の大きい流れに対しては、この測定システムがそのままでは誤差が大きくなることを示した。本報では、前報に続く一連の研究として、時間的に平均化された投影データ(X線の透過強度)を用いることにより、二相流のいかなる流動様式においても精度よく2次元局所ボイド率分布を測定可能なデータ収集処理システム(ACTS:Advanced Computed Tomogram System)を作成検証し、加えて、このシステムがバンドル流路内の2次元ボイド率分布測定にも適用できることを明確にしようとするものである。 (日本)Additional details
Additional titles
- Original title (Japanese)
- X線CTスキャナによる二相流局所ボイド率分布の測定
Identifiers
- DOI
- 10.3327/jaesj.26.421;
Publishing Information
- Journal Title
- Nippon Genshiryoku Gakkai-Shi
- Journal Volume
- 26
- Journal Issue
- 5
- Journal Page Range
- p. 421-429
- ISSN
- 0004-7120
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 53116732
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
- Descriptors DEI
- ACCURACY; BWR TYPE REACTORS; COMPARATIVE EVALUATIONS; FUEL ELEMENT CLUSTERS; GAMMA RADIOGRAPHY; IMAGE SCANNERS; KEV RANGE 100-1000; LENGTH; MEASURING INSTRUMENTS; PIPES; SCANNING MEASURING PROJECTORS; TWO-PHASE FLOW; VOID FRACTION
- Descriptors DEC
- DIGITIZERS; DIMENSIONS; ELECTRONIC CIRCUITS; ENERGY RANGE; ENRICHED URANIUM REACTORS; EVALUATION; FLUID FLOW; FUEL ASSEMBLIES; INDUSTRIAL RADIOGRAPHY; KEV RANGE; MATERIALS TESTING; NONDESTRUCTIVE TESTING; POWER REACTORS; PULSE CIRCUITS; REACTORS; SIGNAL CONDITIONERS; TESTING; THERMAL REACTORS; TUBES; WATER COOLED REACTORS; WATER MODERATED REACTORS
Optional Information
- Notes
- 9309110; This record replaces 16031306