CFD Validation of the NASA-CRM using Cflow

LDV measurements are reported of the flow-field associated with a single row of radially injected jets penetrating a core-tube flow. Emphasis is placed on the influence of small feed-annulus height on jet entry conditions and resulting trajectories and mixing patterns. Conditions of unstable jet behaviour, with strong vortex patterns in the jet holes, were observed for small annulus heights and high annulus velocities. Most measurements were however taken under stable conditions to allow the data to be used in a CFD validation exercise. Significant differences in the strength of backflow generated at jet impingement and in the turbulence field in the immediate hole vicinity were observed for different annulus height/core diameter ratios. These were accompanied by jet trajectory and annulus flow structure changes. Measurements of all 3 mean velocity components and associated normal stresses enabled the data to be utilised to assess a 3D CFD calculation incorporating a k-ε turbulence closure. The strength of forward and back flow generated at impingement was accurately predicted when the QUICK discretisation scheme was used. However, the size of upstream vortex was overpredicted. As expected using an eddy viscosity model the turbulence field at jet impingement and in the hole vicinity was not correctly reproduced. The turbulence generation in the flow approaching the hole was greatly overestimated by the turbulence model used.

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CFD validation and evaluation for combustor and nozzle flows. II

10.2514/6.1994-25 ◽

1994 ◽

Author(s):

Houshang Ebrahimi

Keyword(s):

Cfd Validation ◽

Nozzle Flows

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CFD validation of condensation heat transfer in scaled-down small modular reactor applications, Part 2: Steam and non-condensable gas

Experimental and Computational Multiphase Flow ◽

10.1007/s42757-021-0113-7 ◽

2021 ◽

Author(s):

Palash Kumar Bhowmik ◽

Joshua Paul Schlegel ◽

Varun Kalra ◽

Syed Alam ◽

Sungje Hong ◽

...

Keyword(s):

Heat Transfer ◽

Condensation Heat Transfer ◽

Cfd Validation ◽

Small Modular Reactor

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CFD validation by measurement of specialized ventilation equipments on duct tract

MATEC Web of Conferences ◽

10.1051/matecconf/201712502028 ◽

2017 ◽

Vol 125 ◽

pp. 02028

Author(s):

Stanislav Sehnalek

Keyword(s):

Cfd Validation

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Experimental Validation Data for Computational Fluid Dynamics of Forced Convection on a Vertical Flat Plate

Journal of Fluids Engineering ◽

10.1115/1.4031007 ◽

2015 ◽

Vol 138 (1) ◽

Cited By ~ 8

Author(s):

Jeff R. Harris ◽

Blake W. Lance ◽

Barton L. Smith

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Forced Convection ◽

Vertical Plate ◽

Navier Stokes ◽

Validation Dataset ◽

System Response ◽

Cfd Validation ◽

Validation Data ◽

Computational Fluid Dynamics Cfd

A computational fluid dynamics (CFD) validation dataset for turbulent forced convection on a vertical plate is presented. The design of the apparatus is based on recent validation literature and provides a means to simultaneously measure boundary conditions (BCs) and system response quantities (SRQs). All important inflow quantities for Reynolds-Averaged Navier-Stokes (RANS). CFD are also measured. Data are acquired at two heating conditions and cover the range 40,000 < Rex < 300,000, 357 < Reδ2 < 813, and 0.02 < Gr/Re2 < 0.232.

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