Naslov
Effect of Spherical Blockage Configurations on Film Cooling

Autori
Wang, Jin ; Tian, Ke ; Zhang, Kai ; Baleta, Jakov ; Sunden , Bengt

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Digital Proceedings of 12th Conference on Sustainable Development of Energy, Water and Environment Systems - SDEWES / Ban, Marko et al. - Zagreb : Fakultet strojarstva i brodogradnje Sveučilišta u Zagrebu, 2017

Skup
12th Conference on Sustainable Development of Energy, Water and Environment Systems - SDEWES

Mjesto i datum
Dubrovnik, Hrvatska, 04.10.2017. - 08.10.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Film cooling ; blockage ; mist injection ; sphere ; gas turbine

Sažetak
With increasing inlet temperature of gas turbines, turbine blades need to be effectively protected by using cooling technologies. However, the deposition from the fuel impurities and dust particles in the air is often found inside film holes, which results in partial hole blockage. In this paper, the geometry is simplified as a rectangular channel, and the effect of three blockage ratios is investigated by using the Realizable k- turbulence model. In addition, water droplets are also released from the coolant inlet to provide a comparison of the results with and without mist injection. It is found that the lateral film cooling effectiveness is reduced with increasing blockage ratio. For all the cases with the blowing ratio 0.6, 1% mist injection provides an improvement of the cooling performance by approximately 10%.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA