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Title: PIV measurements of turbulent flows in a 61-pin wire-wrapped hexagonal fuel bundle

Authors:
; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1413775
Grant/Contract Number:
NE0008321
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
International Journal of Heat and Fluid Flow
Additional Journal Information:
Journal Volume: 65; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-12-15 22:29:32; Journal ID: ISSN 0142-727X
Publisher:
Elsevier
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Nguyen, Thien, Goth, Nolan, Jones, Philip, Lee, Saya, Vaghetto, Rodolfo, and Hassan, Yassin. PIV measurements of turbulent flows in a 61-pin wire-wrapped hexagonal fuel bundle. United Kingdom: N. p., 2017. Web. doi:10.1016/j.ijheatfluidflow.2017.03.007.
Nguyen, Thien, Goth, Nolan, Jones, Philip, Lee, Saya, Vaghetto, Rodolfo, & Hassan, Yassin. PIV measurements of turbulent flows in a 61-pin wire-wrapped hexagonal fuel bundle. United Kingdom. doi:10.1016/j.ijheatfluidflow.2017.03.007.
Nguyen, Thien, Goth, Nolan, Jones, Philip, Lee, Saya, Vaghetto, Rodolfo, and Hassan, Yassin. Thu . "PIV measurements of turbulent flows in a 61-pin wire-wrapped hexagonal fuel bundle". United Kingdom. doi:10.1016/j.ijheatfluidflow.2017.03.007.
@article{osti_1413775,
title = {PIV measurements of turbulent flows in a 61-pin wire-wrapped hexagonal fuel bundle},
author = {Nguyen, Thien and Goth, Nolan and Jones, Philip and Lee, Saya and Vaghetto, Rodolfo and Hassan, Yassin},
abstractNote = {},
doi = {10.1016/j.ijheatfluidflow.2017.03.007},
journal = {International Journal of Heat and Fluid Flow},
number = C,
volume = 65,
place = {United Kingdom},
year = {Thu Jun 01 00:00:00 EDT 2017},
month = {Thu Jun 01 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.ijheatfluidflow.2017.03.007

Citation Metrics:
Cited by: 3works
Citation information provided by
Web of Science

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  • Two wire-wrapped rod bundles with different leads (6 in. and 12 in.) were constructed with geometric parameters similar to proposed LMFBR fuel assemblies. Rod diameter was 0.25 in. and pitch-to-diameter ratio was 1.26. These two bundles were tested in a flow loop which was designed and built for mixing experiments. Fluid mixing was studied by means of salt tracer dispersion. Salt was injected at various radial and axial locations in the bundle via injection rods, and then the dispersed distribution was measured at the bundle exit by means of 126 specially designed electrical conductivity probes inserted into the bundle subchannels.more » The data collected showed a strong swirl flow around the bundle circumference and periodic variation with axial injection location. Data from turbulent runs was generally good with mass balances averaging 90% and having a spread of +- 25%. The laminar data collected was generally poor because of a ''striping'' phenomena and injection instabilities. Data were compared with calculations using the ENERGY computer code. The comparison between ENERGY calculations and the data was not good for laminar flow and was only fair in the turbulent cases. It was found that turbulent data could be best characterized by the ENERGY parameters C/sub 1/ = 0.19 and epsilon/sub 1/* = 0.025 when the lead was 6 inches; for a 12-inch lead the parameters were C/sub 1/ = 0.16 and epsilon/sub 1/* = 0.012. Pressure drop data was also taken from the two bundles and it too showed a periodic variation with axial location. Friction factors derived from the data were generally higher than predicted by available correlations. These data suggested that traditional flow split calculations could be in error and that the laminar-turbulent transition occurs over a broad Reynolds number range in wire-wrapped rod bundles.« less
  • Mixing, pressure drop, and flow split experiments were performed on a 61 pin LMFBR fuel bundle with a pitch to diameter ratio of 1.25, and lead lengths of 6 and 12 inches. The mixing results obtained from salt injection experiments were found to depend on injection depth. The deeper injection is expected to give the more accurate results. The pressure drop data was presented as friction factor versus Reynolds number, and the results were compared to the correlation of Hawley. The flowsplit data presented was flawed by corroded bundle walls, but some insight was obtained on the effect of roughmore » surfaces on flowsplit, and how to account for its effect in the correlations.« less
  • This paper deals with fuel pin cooling capability under fission gas release into a wake region of local blockage in a fuel subassembly of an LMFBR, as a consequence of pin failure caused by a local blockage. Experiments for fission gas release into a locally blocked 37-pin bundle are described and results are given regarding various fission gas release modes. Data revealed that only at the gas accumulation zone in the wake region did temperature behind blockage increase significantly. The temperature field strongly depends on both coolant velocity and gas release rate. 17 refs.
  • Flow-split, pressure-drop, and mixing experiments were performed on a 37-pin LMFBR rod bundle with a P/D = 1.154 and H/D = 13.4 to verify the Chiu-Hawley-Burns correlations and to supplement the existing data base. The isokinetic extraction method, pitot-static probe pressure-measurement method, and salt-tracer-injection method were used for these experiments. The experimental results of the turbulent-flow-split parameters were predicted by the correlations within 3%. However, significant discrepancy between data and correlation existed in the transition flow regime (Re/sub b/ < 10,000). Flow-split parameters for Re/sub b/ < 3000 were not attainable because of the restriction of the isokinetic extraction method.more » The friction factor results showed a smooth transition from the laminar-flow regime to turbulent-flow regime. They were slightly overpredicted by the correlations, especially in the laminar-flow regime. The local swirl-flow ratio, C/sub IL/, in the turbulent-flow regime was found to be about 0.28, which was within 10% of the correlation value 0.265.« less