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Characteristics for Sludge Removal Nozzle in Steam Generator  

Lee Sam-Goo (전북대학교 기계항공시스템공학부)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.8, no.3, 2004 , pp. 37-43 More about this Journal
Abstract
Water-jet trajectory visualization and velocity deficits from a high pressurized steam-generator nozzles were experimentally observed. In order to find an optimal nozzle configuration. several parameters affecting plugging and erosion onto the steam generator tube were quantitatively analyzed. For the experiments, a high-pressurized pump (pressure in use: 200 kg/$\textrm{cm}^2$, 15 HP, 11 kW, output flow Q : 301/min) was utilized. Visualization, velocity distribution, and spray growth rate with different nozzle configurations have been mainly focused using a 2-D PDPA system. The results indicated that trajectories along the centerline regardless of their configurations has its potential core region. However, the phenomena from the peripheral part need to be meticulously considered. Accordingly, it is evident that quantitative velocity deficits at the outer region are outstanding due to the aerodynamical drag and entrainment.
Keywords
Steam-generator; Visualization; Nozzle Configuration; Velocity Distribution; PDPA; Entrainment;
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