Erosion Modeling Analysis For DWPF MFT/SME Tanks

LEE, SI

Savannah River Site (S.C.)

关键词: Evaporators;    Abrasives;    Impingement;    Geometry;    36 Materials Science;   

DOI  :  10.2172/824267
RP-ID  :  WSRC-TR-2003-00435
RP-ID  :  AC09-96SR18500
RP-ID  :  824267

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report presents the application of computational fluid dynamics (CFD) methods to qualitative estimate of the erosion phenomena expected in the actual Slurry Mixer Evaporator (SME) and MFT (Melter Feed Tank) process facilities by calculating erosion drivers. Using the transport equations governing the slurry flow, two erosion mechanisms were considered to evaluate high erosion sites and to investigate the primary cause of erosion damage for the modeling domain representative of the actual mixing process in the SME/MFT vessels. One of the two erosion mechanisms is the abrasive erosion which is worn by high wall shear of viscous liquid or by continuous contact or low-angle collision of the moving solids with rough surface, and the other is the chip-off erosion which is mainly governed by high-angle impingement of particles. Ductile wall material such as stainless steel is damaged by wall mechanism when particles are impinged on the ductile surface of the present coil guide geometry with wide-open space and no closed- and curved-flow path. The previous results show that the primary locations of high erosion due to particle impingement are at the occurrence of sudden change of flow direction, sudden contraction, and flow obstruction.