TY - GEN
T1 - Flow visualization of pebble bed HTGR
AU - Lee, Jae Young
AU - Lee, Sa Ya
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - The nuclear core of High Temperature Gas Reactor(HTGR) with pebble bed type has been investigated intensively due to its benefits in management, but its complicated flow geometry requested the reliable analytical method. Recent studies have been made using the three dimensional computational methods but they need to be evaluated with the experimental data. Due to the complicated and narrow flow channel, the intrusive methods of flow measurement are not proper in the study. In the present study, we developed a wind tunnel for the pebble bed geometry in the structure of Face Centered Cubic(FCC) and measure the flow field using the Particle Image Velocimetry(PIV) directly. Due to the limitation of the image harnessing speed and accessibility of the light for particle identification, the system is scaled up to reduce the mean flow velocity by keeping the same Reynolds number of the HTGR. The velocity fields are successfully determined to identify the stagnation points suspected to produce hot spots on the surface of the pebble. It is expected that the present data is useful to evaluate the three dimensional Computational Fluid Dynamics(CFD) analysis. Furthermore, It would provide an insight of experimental method if the present results are compared by those of scaled down and liquid medium.
AB - The nuclear core of High Temperature Gas Reactor(HTGR) with pebble bed type has been investigated intensively due to its benefits in management, but its complicated flow geometry requested the reliable analytical method. Recent studies have been made using the three dimensional computational methods but they need to be evaluated with the experimental data. Due to the complicated and narrow flow channel, the intrusive methods of flow measurement are not proper in the study. In the present study, we developed a wind tunnel for the pebble bed geometry in the structure of Face Centered Cubic(FCC) and measure the flow field using the Particle Image Velocimetry(PIV) directly. Due to the limitation of the image harnessing speed and accessibility of the light for particle identification, the system is scaled up to reduce the mean flow velocity by keeping the same Reynolds number of the HTGR. The velocity fields are successfully determined to identify the stagnation points suspected to produce hot spots on the surface of the pebble. It is expected that the present data is useful to evaluate the three dimensional Computational Fluid Dynamics(CFD) analysis. Furthermore, It would provide an insight of experimental method if the present results are compared by those of scaled down and liquid medium.
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M3 - Conference contribution
AN - SCOPUS:70349895168
SN - 9780791848548
T3 - 2008 Proceedings of the 4th International Topical Meeting on High Temperature Reactor Technology, HTR 2008
SP - 319
EP - 322
BT - 2008 Proceedings of the 4th International Topical Meeting on High Temperature Reactor Technology, HTR 2008
T2 - 2008 4th International Topical Meeting on High Temperature Reactor Technology, HTR 2008
Y2 - 28 September 2008 through 1 October 2008
ER -