Magnetic Toroidal Facility (MTOR) has been constructed Multiple MHD experiments currently underway in FY02
MHD effects on fluid flow and heat transfer are dominant issues for liquid metal walls Extensive effort was initiated in FY02 and will be a major focus in APEX for FY03/04 1. Serious modeling of 3D MHD Flows with multiple component magnetic fields (no tools currently exist) 2. Intensive experiments on MTOR and LIMITS facilities to provide direct data for design and model validation CMOD module mockup in MTOR Ga-In-Sn Jet trajectory deviated from vertical strong magnetic field
FLIHY Facility Free Surface Heat Transfer with Flibe Simulant FY02 Accomplishments Completed construction of FLIHY Facility, initiated freesurface turbulent hydrodynamics and heat transfer experiments The new experimental data used to validate k-e model for turbulent friction factor and flow depth Turbulent free surface experiments demonstrated enhancement of heat transfer in highly wavy flow regimes IR Camera Image THICKNESS, mm 12 10 8 6 4 THICKNESS Experiment Calculations 4 8 12 16 20 24 Q, l/s 10000 20000 30000 40000 50000 60000 Re FLIHY Open-Channel Apparatus h+ h h- h
Low Conductivity Fluids Appear Promising for LW (Innovative spirit plus patience produce results) - Flibe design was found to be severely constrained with high melting point (460C) and relatively low allowable temperature (from plasma interaction) - Flinabe was discovered. Relatively low melting point (240-310C). Appears very promising with comfortable design window. Flinabe (LiF-NaF-BeF 2 ) Melting temperature ( o C) 240-310 Inlet temperature ( o C) 350 Maximum temperature rise ( o C) (for surface 60 90 heat load of 1.4 MW/m 2 ) Maximum surface temperature at outlet ( o C) 440 (< 480 allowable) Wall surface temperature limits for high-recycling tokamak from Plasma Edge Modeling Material lithium Tin-lithium Flibe/Flinable Tin Teff ( o C) 390 600 450 810 Tout ( o C) 420 630 480 840 T-Tinlet, K 100 80 60 40 20 0 TEMPERATURE RISE: q=1.4 MW/m2 Tsurf: U=10 m/s; h=2.3 cm; B=0 Tbulk Tsurf: U=10 m/s; h=2.3 cm; Bo=10 T 0 2 4 6 8 10 Distance from the nozzle, m
Liquid Wall scientific feasibility demonstration experiment is planned in FY03/04 (for low-k fluids) FY03 Milestones Initiation of curved wall experiments using water as Flibe simulant FY04 Milestones Initiation of penetration experiments on curved liquid wall test section
JUPITER-II Flibe Thermofluid Simulation FY02 Accomplishments Design/fabrication of first closedchannel test section and diagnostics Initiate operation of FLIHY-C facility and initial turbulence experiments Finalize safety hardware/procedures for initiation of experiments with KOH working fluid FLIHY-C KOH Flow Facility 3.5 m Long Test Section PIV Laser System FuY 2001 FuY 2002 FuY 2003 FuY 2004 FuY 2005 FuY 2006 Thermofluid Flow Facility: FLIHY-Closed (UCLA) Non-magnetic Phase Turbulence Visualization Check & Review Heat Transfer Pipe flow geometries with innovative heat transfer enhancement configurations Continue with heat transfer, or another option Magnetic Phase Check & Review Turbulence Visualization Heat Transfer Same geometries as 2001-03 with magnetic field Continue with MHD, or another option? Check & Review Flibe Loop, or another option? Integrated FLIBE Experiment?
JUPITER-II SiC/Pebble Bed Thermomechanics Study Phenomenological and numerical modeling Small scale experiments (Obtain thermophysical data and technological experience with SiC systems) International collaboration 10 9 Time = 0 minutes Time = 2000 minutes 10 8 Be/SiC/He interface conductance (to be conducted in Be-enclosure) 350 10 7 0 0.005 0.01 0.015 0.02 0.025 Container Radius (m) Average stress exerted on the particles at initial time and at time 2000 minutes. The average stress drops about one order of magnitude for most of the particles (Li 4 SiO 4 /SS) Temperature (C) 300 250 200 150 100 50 0 K eff = 1.27 w/mk h = ~2,000 w/m 2 k Li 2 O/SS/He 0 10 20 30 40 50 60 Distance from the interface (mm) Series1 Series2 Series3 Series4