Refine your search:     
Report No.
 - 
Search Results: Records 1-13 displayed on this page of 13
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Effect of deflected inflow on flows in a strongly-curved 90 degree elbow

Iwamoto, Yukiharu*; Kusuzaki, Ryo*; Sogo, Motosuke*; Yasuda, Kazunori*; Yamano, Hidemasa; Tanaka, Masaaki

Proceedings of ASME-JSME-KSME Joint Fluids Engineering Conference 2015 (AJK 2015-FED) (USB Flash Drive), p.1767 - 1773, 2015/07

Wall pressure measurements and flow visualization were conducted for a 90 degree elbow of which the axis curvature radius became the same as its inner diameter (125 mm). A deflected inflow, having an almost constant velocity slope, was introduced. Ensemble averaged pressure distributions showed no normalized pressure difference in cases of Reynolds numbers of 320,000 and 500,000. Comparisons with uniform inlet flow case proved; low-pressure region at the intrados of the elbow was weakened whereas a high pressure region outside strengthened in the deflected inflow case. Pressure distribution downstream of the elbow increased at the inside until two diameters downstream from the elbow exit. Flow visualization showed the pressure increase from collision of a strengthened secondary flow of extrados convection. The unsteady pressure distribution showed a circumferential extent of a strongly fluctuating region in and downstream the elbow decreased, comparing with the uniform inlet flow case.

Journal Articles

Study on flow induced vibration evaluation for a large scale JSFR piping, 4; Unsteady flow characteristics in 1/10 scale hot-leg piping experiments under undeveloped and swirl inflow conditions

Iwamoto, Yukiharu*; Kondo, Manabu*; Yasuda, Kazunori*; Sogo, Motosuke*; Tanaka, Masaaki; Yamano, Hidemasa

Proceedings of 19th International Conference on Nuclear Engineering (ICONE-19) (CD-ROM), 10 Pages, 2011/10

Journal Articles

Study on flow-induced-vibration evaluation of large-diameter pipings in a sodium-cooled fast reactor, 4; Experiments on the 1/10-scale hot leg test facility in Reynolds number of 50000 and 320000

Iwamoto, Yukiharu*; Yasuda, Kazunori*; Sogo, Motosuke*; Yamano, Hidemasa; Kotake, Shoji

Proceedings of 6th Japan-Korea Symposium on Nuclear Thermal Hydraulics and Safety (NTHAS-6) (USB Flash Drive), 6 Pages, 2008/11

Pressure measurement, laser Doppler velocimetry (LDV) and flow visualization were carried out using the 1/10-scale model of a hot leg piping installed in a Japanese sodium-cooled fast breeder reactor. LDV measurement with Reynolds number of 50000 showed the following results: (1) A flow separation was confirmed in the region between 45 degrees from the elbow inlet and 0.3 times of pipe diameter downstream of the elbow. (2) There appeared two kinds of fluctuations in the present study. In the case of Reynolds number of 320000, it was found that the height of the flow separation downstream of the elbow became smaller, since the inertia of the flow became superior to the inverse pressure gradient.

Oral presentation

Study on flow-induced-vibration evaluation of large-diameter pipings in a sodium-cooled fast reactor, 14; Examination of inlet turbulent intensity by LDV measurement in a 1/10 scale model

Iwamoto, Yukiharu*; Kondo, Manabu*; Ikeuchi, Hiroki*; Yasuda, Kazunori*; Sogo, Motosuke*; Tanaka, Masaaki; Yamano, Hidemasa

no journal, , 

To clarify the effect of a straight pipe length connecting to the upstream on the elbow flow, the experiment was performed to measure the velocity distribution of the flow with a buffer tank in the upstream from the elbow. The measured data were compared with the previous data in the upstream condition with a fully developed flow.

Oral presentation

Effects of inflow conditions on flow induced vibration occurring in a strongly curved bend

Kondo, Manabu*; Ikeuchi, Koki*; Iwamoto, Yukiharu*; Yasuda, Kazunori*; Sogo, Motosuke*; Yamano, Hidemasa; Tanaka, Masaaki

no journal, , 

no abstracts in English

Oral presentation

Effects of inflow conditions on flow occuring in a strongly curved bend

Ikeuchi, Koki*; Kondo, Manabu*; Iwamoto, Yukiharu*; Yasuda, Kazunori*; Sogo, Motosuke*; Tanaka, Masaaki; Yamano, Hidemasa

no journal, , 

no abstracts in English

Oral presentation

Flow in a bend with high curvature in a swirling flow

Takai, Yu*; Kondo, Manabu*; Iwamoto, Yukiharu*; Yasuda, Kazunori*; Sogo, Motosuke*; Tanaka, Masaaki; Yamano, Hidemasa

no journal, , 

In the present study, velocity distributions were measured using LDV under 320000 of Reynolds number in an experimental facility, where a swirling flow entered a 90 degree bend.

Oral presentation

Phenomenon of flow induced vibartion occurring in a strongly curved bend with swirling inlet

Kondo, Manabu*; Takai, Yu*; Iwamoto, Yukiharu*; Yasuda, Kazunori*; Sogo, Motosuke*; Yamano, Hidemasa; Tanaka, Masaaki

no journal, , 

In the present study, velocity distributions were measured using LDV under 320000 of Reynolds number in an experimental facility, where a swirling flow entered to a 90-degree bend.

Oral presentation

Study on flow-induced-vibration evaluation of large-diameter pipings in a sodium-cooled fast reactor, 23; Examination of a swirling inflow using a 1/10 hot leg scale model

Iwamoto, Yukiharu*; Yasuda, Kazunori*; Sogo, Motosuke*; Tanaka, Masaaki; Yamano, Hidemasa

no journal, , 

LDV measurement has been performed on the swirling inflow with its non-dimensional angular momentum of 0.12 in an elbow whose radius of pipe-axis curvature and inside pipe diameter are the same. Flow-induced-vibration generated in the flow field and elbow has been compared with that of non-swirling inflow to show no difference in non-dimensional frequency.

Oral presentation

LDV measurements of a deflected inflow in elbow-type bend section under a high Reynolds number condition

Ogawa, Shota*; Iwamoto, Yukiharu*; Yasuda, Kazunori*; Sogo, Motosuke*; Yamano, Hidemasa; Tanaka, Masaaki

no journal, , 

no abstracts in English

Oral presentation

Evaluation of flow-induced vibration of a primary circuit hot-leg piping in a sodium-cooled fast reactor, 4; LDV flow measurement in a 1/10-scale hot-log piping test facility

Iwamoto, Yukiharu*; Ogawa, Shota*; Yasuda, Kazunori*; Sogo, Motosuke*; Tanaka, Masaaki; Yamano, Hidemasa

no journal, , 

Oral presentation

Unsteady wall pressure characteristics of the deflected flow flowing into an elbow

Kusuzaki, Ryo*; Murakami, Koichi*; Iwamoto, Yukiharu*; Yamano, Hidemasa; Yasuda, Kazunori*; Sogo, Motosuke*

no journal, , 

Steady and unsteady characteristics was investigated by measuring wall surface pressure at the inner surface of elbow with fast deflected flow into the intrados of the bend, the radius of which is same as the pipe axis curvature radius.

Oral presentation

Development of treatment technology for spent solvent generated from fuel reprocessing process, 3; Oxidative decomposition treatment of the spent phosphoric acid extracting agent

Yasuda, Masaki*; Arai, Tsuyoshi*; Watanabe, So; Arai, Yoichi; Nomura, Kazunori

no journal, , 

no abstracts in English

13 (Records 1-13 displayed on this page)
  • 1