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THEORETICAL STUDY OF MIXED CONVECTION IN POLOIDAL FLOWS OF DCLL BLANKET N. Vetcha, S. Smolentsev and M. Abdou
 

Summary: THEORETICAL STUDY OF MIXED CONVECTION IN POLOIDAL FLOWS OF DCLL BLANKET
N. Vetcha, S. Smolentsev and M. Abdou
Fusion Science and Technology Center at University of California, Los Angeles, CA, 90024, vnaveen@fusion.ucla.edu
An approach is developed to study the stability of
mixed convection in the poloidal flows of the DCLL
blanket. Modified Orr-Sommerfeld equations are derived
and then solved using a numerical code based on a
pseudo-spectral method. The stability analysis has been
performed for the flows in the front blanket ducts, where
the forced flow is upwards; showing that in the DCLL
blanket conditions, all disturbances associated with the
buoyant flows in the front ducts will likely be damped by a
strong toroidal magnetic field.
I. INTRODUCTION
In the dual-cooled lead-lithium (DCLL) blanket,
which is considered in the US for testing in ITER and for
using in DEMO, the eutectic alloy lead-lithium (PbLi)
circulates slowly (at ~ 10 cm/s) for power conversion and
tritium production (Fig. 1). In this blanket, the most of
heat deposition and tritium breeding occur in the poloidal

  

Source: Abdou, Mohamed - Fusion Science and Technology Center, University of California at Los Angeles

 

Collections: Plasma Physics and Fusion