thermal hydraulic analysis in support to the water experiment target header dimensioning
Download
Skip this Video
Download Presentation
Thermal-Hydraulic Analysis in Support to the Water Experiment Target Header Dimensioning

Loading in 2 Seconds...

play fullscreen
1 / 13

Thermal-Hydraulic Analysis in Support to the Water Experiment Target Header Dimensioning - PowerPoint PPT Presentation


  • 86 Views
  • Uploaded on

Thermal-Hydraulic Analysis in Support to the Water Experiment Target Header Dimensioning. Presented by Vincent Moreau CRS4, Energy & Environment Program. EUROTRANS-DEMETRA WP 4.4 meeting FZK-Karlsruhe 08-03-2007. General features.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Thermal-Hydraulic Analysis in Support to the Water Experiment Target Header Dimensioning' - lamar-hinton


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
thermal hydraulic analysis in support to the water experiment target header dimensioning

Thermal-Hydraulic Analysis in Support to the Water ExperimentTarget Header Dimensioning

Presentedby

Vincent Moreau

CRS4, Energy & Environment Program

EUROTRANS-DEMETRA WP 4.4 meeting FZK-Karlsruhe 08-03-2007

general features
General features
  • Support to the water free surface experiment
    • Propose Header pre-sizing
    • Check Header pre-sizing
  • Objective
    • Minimize deviation of flow axial-symmetry at the active region inlet
    • Avoid excessively huge pressure losses
    • Simple design
    • Design insensitive to small geometric perturbation (where possible)
  • Constraints
    • Header fed by an horizontal pipe of 82 mm Internal Diameter (ID)
    • Header internal diameter less than 183.4 mm
    • Header Height no more than 200 mm
    • Header annular outlet dimension fixed (internal 69.2mm, external 103.5)
proposed solution
Proposed Solution
  • Header ID 180 mm (limit 183.4mm)
  • Header Height 190 mm (limit 200 mm)
  • Horizontal pipe connecting the upper part of the Header to give more room for flow regularisation.
  • Flow enhanced regularisation obtained by insertion of a set of centred annular hollow plates.
geometry 3 variants
Geometry: 3 variants

Header without concentric plate

Header with 2 plates

Header with 3 plates

computational features
Computational features
  • StarCD V4.0 CFD code.
  • Steady State calculation with Standard k-e (also tested Chen and NRG variants without significant change)
  • About 160 000 polyhedral cells (Full 3D) with a 2 cells/1 mm (58.000) boundary layer.
result analysis
Result Analysis
  • Relative annular dispersion of velocity in the outlet core (thus without considering a 1mm boundary layer)
  • Global pressure loss between computational domain inlet and outlet.
flow arrangement header without concentric plate
Flow arrangement Header without concentric plate

Flow in the annular outlet channel clearly non uniform

slide10

Flow arrangement Header with 2 plates

Flow in the annular channel much more uniform

One global maximum in outlet

slide11

Flow arrangementHeader with 3 plates

Flow in the annular channel still more uniform

Flow in outlet with two local maxima

concluding note
Concluding Note
  • Before entering the free surface region, the flow is expected to withstand about another 12000 Pa which is about 4 times the kinetic energy (1/2 ru2 ~3000 Pa). Therefore we expect the velocity dispersion to be at least one order lower and fall down below 1% for each configuration.
  • The 3 plate configuration gives the better result and would be the proposed solution if the pressure drop is readily available.
ad