Numerical Investigation On The Effects Of Geometrical Parameters On Film Cooling Performance

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dc.contributor.authorAli, Amir Hussein
dc.date.accessioned2018-12-07T01:19:56Z
dc.date.available2018-12-07T01:19:56Z
dc.date.issued2013-07
dc.description.abstractThe aim of this study is to investigate the effect of different kinds of cooling holes and staggered arrangements on adiabatic and conjugate film cooling effectiveness for convex surface of gas turbine blade. The investigation included a new cooling hole scheme called heart-shaped to solve the vortex problem claimed to be responsible for the detrimental lift-off phenomenon in conventional simple cylinder film cooling holes. Also, the conjugate studies included a new conjugate blade technique called multi-layers to be helpful in speeding up the heat absorption from the upper blade surface. Fluent® has been utilized and realizable κ-𝜖𝜖 turbulent model has been used. Besides, the energy equation has been solved. Grid independence study has been fulfilled. Study of temperature ratio between the coolant and the mainstream hot gas Tc/Tg has been performed using four values of temperature ratios, namely, 0.5, 0.6, 0.7, and 0.8. Temperature ratio of Tc/Tg = 0.6 found to be in good agreement with the experimental data among all of the other models and the model has been validated. This computational validation serves as the baseline for further studies of optimization in determining the film cooling effectiveness. Optimization studies for adiabatic film cooling effectiveness have been conducted for in-lined and staggered arrangements of two and three rows. A 10°diffused hole (β = 10°, γ = 0°) and compound hole of 10° diffused and 45° with the downstream direction (β = 10°, γ = 45°) film cooling holes have been investigated and have been compared with that of simple hole (β = 0°, γ = 0°) film cooling on convex surface.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/7229
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectEffects Of Geometrical Parametersen_US
dc.subjectFilm Cooling Performanceen_US
dc.titleNumerical Investigation On The Effects Of Geometrical Parameters On Film Cooling Performanceen_US
dc.typeThesisen_US
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