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http://dx.doi.org/10.6108/KSPE.2015.19.1.061

1-D Analysis for Water Spray Cooling of Exhaust Gas in Combustor Test Facility  

Im, Ju Hyun (The 4th R&D Institute, Agency for Defense Development)
Kim, Myung Ho (The 4th R&D Institute, Agency for Defense Development)
Kim, Yeong Ryeon (The 4th R&D Institute, Agency for Defense Development)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.19, no.1, 2015 , pp. 61-67 More about this Journal
Abstract
The cooling of hot exhaust gas is an important issue for the construction of combustor test facility. Water spray is an effective method for exhaust gas cooling due to its large latent heat in process of evaporation. In this study, 1-D analysis has been performed based on continuity, energy conservation, and saturated vapor property to understand water spray cooling of combustion gas. In the exhaust duct of combustor test facility, the injected water decreases combustion gas temperature, and evaporates in the combustion gas. However, some of the injected water is collected in the sump due to condensation. The evaporation of water helps combustion gas cooling, but causes pressure increase inside the exhaust duct due to increase of vapor pressure. These phenomena has been analyzed by 1-D modeling in this study. From 1-D analysis, the adequate mass flow rate of water spray to cool combustion gas and to avoid excessive pressure rise inside the exhaust duct has been decided.
Keywords
Water Spray Cooling; 1-D Analysis; Continuity; Energy Conservation; Saturated Vapor Property;
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