In this study, the influence of geometric factors such as hole diameter (D), length-to-diameter ratio (L/D), injection angle (α), and lateral expansion angle (β) on film cooling effectiveness of holes made using EDM is experimentally investigated. Nine different cooling configurations were tested on a flat plate wind tunnel at various coolant Reynolds number (Rec) and coolant to mainstream blowing ratio (M). The considered flat plate model incorporates engine sized V-shaped holes. EDM reliability is assessed through a hole qualification process, while effectiveness was measured by the Pressure Sensitive Paint (PSP) technique. Results confirm the suitability of EDM for Vshaped hole manufacturing as long as a correct tolerance on β is prescribed. An accurate qualification of hole morphology is also recommended.

(2021). Film cooling effectiveness measurement of fan-shaped holes manufactured using EDM technique . Retrieved from http://hdl.handle.net/10446/228873

Film cooling effectiveness measurement of fan-shaped holes manufactured using EDM technique

Rouina, S.;Abdeh, H.;Barigozzi, G.;
2021-01-01

Abstract

In this study, the influence of geometric factors such as hole diameter (D), length-to-diameter ratio (L/D), injection angle (α), and lateral expansion angle (β) on film cooling effectiveness of holes made using EDM is experimentally investigated. Nine different cooling configurations were tested on a flat plate wind tunnel at various coolant Reynolds number (Rec) and coolant to mainstream blowing ratio (M). The considered flat plate model incorporates engine sized V-shaped holes. EDM reliability is assessed through a hole qualification process, while effectiveness was measured by the Pressure Sensitive Paint (PSP) technique. Results confirm the suitability of EDM for Vshaped hole manufacturing as long as a correct tolerance on β is prescribed. An accurate qualification of hole morphology is also recommended.
2021
Rouina, Samaneh; Abdeh, Hamed; Barigozzi, Giovanna; Odemondo, V.; Abba, L.; Iannone, M.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/228873
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