Effects of surface deposition and droplet injection on film cooling (CROSBI ID 226135)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Wang, Jin ; Cui, Pei ; Vujanović, Milan ; Baleta, Jakov ; Duić, Neven ; Guzović, Zvonimir
engleski
Effects of surface deposition and droplet injection on film cooling
In the present research, the influence of the particle dispersion onto the continuous phase in film cooling application was analysed by means of numerical simulations. The interaction between the water droplets and the main stream plays an important role in the results. The prediction of two-phase flow is investigated by employing the discrete phase model (DPM). The results present heat transfer characteristics in the near-wall region under the influence of mist cooling. The local wall temperature distribution and film cooling effectiveness are obtained, and results show that the film cooling characteristics on the downstream wall are affected by different height of surface deposits. It is also found that smaller deposits without mist injection provide a lower wall temperature and a better cooling performance. With 2% mist injection, evaporation of water droplets improves film cooling effectiveness, and higher deposits cause lateral and downstream spread of water droplets. The results indicate that mist injection can significantly enhance film cooling performance.
film cooling ; injection ; mist cooling ; deposition ; water droplet ; thermal barrier coating
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Podaci o izdanju
125 (specijalni br.)
2016.
51-58
objavljeno
0196-8904
10.1016/j.enconman.2016.03.038