NDLI: Idaho National Laboratory Experimental Program to Measure the Flow Phenomena in a Scaled Model of a Prismatic Gas-Cooled Reactor Lower Plenum for Validation of CFD Codes

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Hugh, M. Mcilroy Donald, M. Mceligot Robert, J. Pink
Copyright Year	2008
Abstract	The experimental program that is being conducted at the Matched Index-of-Refraction (MIR) Flow Facility at Idaho National Laboratory (INL) to obtain benchmark data on measurements of flow phenomena in a scaled model of a prismatic gas-cooled reactor lower plenum using 3-D Particle Image Velocimetry (PIV) is presented. A description of the scaling analysis, experimental facility, 3-D PIV system, measurement uncertainties and analysis, experimental procedures and samples of the data sets that have been obtained are included. Samples of the data set that will be presented include the mean velocity field in an approximately 1:7 scale model of a region of the lower plenum of a typical prismatic gas-cooled reactor (GCR) similar to a General Atomics Gas-Turbine-Modular Helium Reactor (GTMHR) design. This experiment has been selected as the first Standard Problem endorsed by the Generation IV International Forum. The flow in the lower plenum consists of multiple jets injected into a confined cross flow — with obstructions. The model consists of a row of full circular posts along its centerline with half-posts on the two parallel walls to approximate flow scaled to that expected from the staggered parallel rows of posts in the reactor design. The model is fabricated from clear, fused quartz to match the refractive-index of the mineral oil working fluid. The benefit of the MIR technique is that it permits high-quality measurements to be obtained without locating intrusive transducers that disturb the flow field and without distortion of the optical paths. An advantage of the INL MIR system is its large size which allows obtaining improved spatial and temporal resolution compared to similar facilities at smaller scales. Results concentrate on the region of the lower plenum near its far reflector wall (away from the outlet duct). Inlet jet Reynolds numbers (based on the jet diameter and the time-mean average flow rate) are approximately 4,300 and 12,400. The measurements reveal developing, non-uniform flow in the inlet jets and complicated flow patterns in the model lower plenum. Data include three-dimensional vector plots, data displays along the coordinate planes (slices) and charts that describe the component flows at specific regions in the model. Information on inlet velocity profiles is also presented.
Starting Page	311
Ending Page	318
Page Count	8
File Format	PDF
ISBN	9780791848555
DOI	10.1115/HTR2008-58043
e-ISBN	9780791838341
Volume Number	Fourth International Topical Meeting on High Temperature Reactor Technology, Volume 2
Conference Proceedings	Fourth International Topical Meeting on High Temperature Reactor Technology
Language	English
Publisher Date	2008-09-28
Publisher Place	Washington, DC, USA
Access Restriction	Subscribed
Subject Keyword	Transducers Computational fluid dynamics Ducts Refractive index Reynolds number Mineral oil Helium Quartz Flow (dynamics) Design Fluids Cross-flow Measurement uncertainty Particulate matter Gas cooled reactors Jets Resolution (optics) Turbines
Content Type	Text
Resource Type	Article

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