EFFECTS OF TURBULENCE PROMOTER ON FLOW IN T-JUNCTION PIPING SYSTEMS(T-junction and Cross Flow)

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概要

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• The piping systems in buildings often have a main duct, junction and branch. The flow at the T-junction is very complex and various problems have resulted from the mixture of the main duct and branch fluids. In particular, thermal fatigue failure accidents at the T-junction in fast breeder reactors (FBRs) have occurred because of thermal fluctuations called "thermal striping." We installed a turbulence promoter at a T-junction and investigated its effect on the flow in T-junction piping systems. An experiment was carried out using a visualization test by dye injection and a velocity measurement by laser Doppler velocimetry (LDV). As a result, we clarified that the secondary flow in pipe sections becomes stronger and the diffusion of momentum increases with the turbulence promoter. The peculiar reverse flow generated by the turbulence promoter can be controlled by adjusting the shape of the turbulence promoter.

• 一般社団法人日本機械学会の論文
• 2005-10-05

著者

• OCHI Junji

  Department of Mechanical Engineering, Ehime University

• Hibara Hideki

  Department Of Mechanical Engineering Ehime University

• MURAMATSU Toshiharu

  O-arai Engineering Center, Japan Nuclear Cycle Development Institute

• NAKAJIMA Naohiro

  Graduate School of Engineering, Ehime University

• TANAKA Masaaki

  O-arai Engineering Center, Japan Nuclear Cycle Development Institute

• IWAMOTO Yukiharu

  Department of Mechanical Engineering, Ehime University

• Iwamoto Yukiharu

  Department Of Mechanical Engineering Ehime University

• Ochi Junji

  Department Of Mechanical Engineering Ehime University

• Nakajima Naohiro

  Graduate School Of Engineering Ehime University

• Tanaka Masaaki

  O-arai Engineering Center Japan Nuclear Cycle Development Institute

• Muramatsu Toshiharu

  O-arai Engineering Center Japan Nuclear Cycle Development Institute

関連論文

• NUMERICAL SIMULATION OF THE FLOW CHARACTERISTICS IN T-JUNCTION WITH TURBULENCE PROMOTER(T-junction and Cross Flow)
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• Near-Wall Bursting Phenomena and Quasi-Streamwise Vortex Models
• TED-AJ03-299 VISUALIZATION EXPERIMENTS ON THE TRANSITIONAL DECAY PROCESS OF SECONDARY FLOW GENERATED IN 90-DEGREE BENDS
• EFFECTS OF TURBULENCE PROMOTER ON FLOW IN T-JUNCTION PIPING SYSTEMS(T-junction and Cross Flow)
• 212 EFFECTS OF ULTRASONIC VIBRATIONS ON A TURBULENT SQUARE-DUCT FLOW(O.S.5 Advanced Technology for Usage of Sound and Vibration I)
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