Development Of An Experiment For Measuring Flow Phenomena Occurring In A Lower Plenum For VHTR CFD Assessment

McEligot, D M; Condie, K G; Mc Creery, G E; Mc Ilroy, H M

doi:10.2172/911891

Title: Development Of An Experiment For Measuring Flow Phenomena Occurring In A Lower Plenum For VHTR CFD Assessment

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Abstract

The objective of the present report is to document the design of our first experiment to measure generic flow phenomena expected to occur in the lower plenum of a typical prismatic VHTR (Very High Temperature Reactor) concept. In the process, fabrication sketches are provided for the use of CFD (computational fluid dynamics) analysts wishing to employ the data for assessment of their proposed codes. The general approach of the project is to develop new benchmark experiments for assessment in parallel with CFD and coupled CFD/systems code calculations for the same geometry. One aspect of the complex flow in a prismatic VHTR is being addressed: flow and thermal mixing in the lower plenum ("hot streaking" issue). Current prismatic VHTR concepts were examined to identify their proposed flow conditions and geometries over the range from normal operation to decay heat removal in a pressurized cooldown. Approximate analyses were applied to determine key non-dimensional parameters and their magnitudes over this operating range. The flow in the lower plenum can locally be considered to be a situation of multiple jets into a confined crossflow -- with obstructions. Flow is expected to be turbulent with momentum-dominated turbulent jets entering; buoyancy influences are estimated to bemore »« less

Authors:: McEligot, D M; Condie, K G; Mc Creery, G E; Mc Ilroy, H M

Publication Date:: Thu Sep 01 00:00:00 EDT 2005

Research Org.:: Idaho National Lab. (INL), Idaho Falls, ID (United States)

Sponsoring Org.:: DOE - NE

OSTI Identifier:: 911891

Report Number(s):: INL/EXT-05-00603
TRN: US0800197

DOE Contract Number:: DE-AC07-99ID-13727

Resource Type:: Technical Report

Country of Publication:: United States

Language:: English

Subject:: 99 - GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; AFTER-HEAT REMOVAL; BENCHMARKS; DESIGN; FABRICATION; GEOMETRY

Citation Formats


                    McEligot, D M, Condie, K G, Mc Creery, G E, and Mc Ilroy, H M. Development Of An Experiment For Measuring Flow Phenomena Occurring In A Lower Plenum For VHTR CFD Assessment.  United States: N. p., 2005. 
        Web.  doi:10.2172/911891.

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                    McEligot, D M, Condie, K G, Mc Creery, G E, & Mc Ilroy, H M. Development Of An Experiment For Measuring Flow Phenomena Occurring In A Lower Plenum For VHTR CFD Assessment.  United States.  https://doi.org/10.2172/911891

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                    McEligot, D M, Condie, K G, Mc Creery, G E, and Mc Ilroy, H M. 2005.  
        "Development Of An Experiment For Measuring Flow Phenomena Occurring In A Lower Plenum For VHTR CFD Assessment".  United States.  https://doi.org/10.2172/911891.  https://www.osti.gov/servlets/purl/911891.

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@article{osti_911891,

  title        = {Development Of An Experiment For Measuring Flow Phenomena Occurring In A Lower Plenum For VHTR CFD Assessment},

  author       = {McEligot, D M and Condie, K G and Mc Creery, G E and Mc Ilroy, H M},

  abstractNote = {The objective of the present report is to document the design of our first experiment to measure generic flow phenomena expected to occur in the lower plenum of a typical prismatic VHTR (Very High Temperature Reactor) concept. In the process, fabrication sketches are provided for the use of CFD (computational fluid dynamics) analysts wishing to employ the data for assessment of their proposed codes. The general approach of the project is to develop new benchmark experiments for assessment in parallel with CFD and coupled CFD/systems code calculations for the same geometry. One aspect of the complex flow in a prismatic VHTR is being addressed: flow and thermal mixing in the lower plenum ("hot streaking" issue). Current prismatic VHTR concepts were examined to identify their proposed flow conditions and geometries over the range from normal operation to decay heat removal in a pressurized cooldown. Approximate analyses were applied to determine key non-dimensional parameters and their magnitudes over this operating range. The flow in the lower plenum can locally be considered to be a situation of multiple jets into a confined crossflow -- with obstructions. Flow is expected to be turbulent with momentum-dominated turbulent jets entering; buoyancy influences are estimated to be negligible in normal full power operation. Experiments are needed for the combined features of the lower plenum flows. Missing from the typical jet experiments available are interactions with nearby circular posts and with vertical posts in the vicinity of vertical walls - with near stagnant surroundings at one extreme and significant crossflow at the other.},

  doi          = {10.2172/911891},

  url          = {https://www.osti.gov/biblio/911891},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Sep 01 00:00:00 EDT 2005},

  month        = {Thu Sep 01 00:00:00 EDT 2005}

}

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