Investigation of the flow near the wall of a single impinging jet at the scaled upper plenum of HTGR using TR-PIV
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Copyright © 2019 by JSME One of the competitive candidate of the future nuclear reactors is the High Temperature Gas-cooled Reactor (HTGR). A 1/16th scaled upper plenum of a HTGR was designed at Texas A&M University to study the flow behaviors in the upper plenum of the HTGR during a Loss-Of-Forced-Coolant Accident (LOFC). Experimental investigation was conducted to study the flow characteristics of a single isothermal jet discharging into the upper plenum by using time-resolved particle image velocimetry (TR-PIV) technique. Experimental results can be used for validating computational fluid dynamics (CFD) codes. In this paper, the velocity measurements performed close to the upper plenum top-wall at the Reynolds number of 10,622 will be present. From the TR-PIV velocity snapshots, statistical characteristics of the jet impingement, such as the mean velocity, root-mean-square fluctuating velocity, and Reynolds stress, were computed and analyzed. In addition, results of two-point spatial velocity cross-correlation and spectral analysis will be discussed.
author list (cited authors)
Alwafi, A., Hassan, Y., Nguyen, T., & Anand, N. K.