This paper describes an experimental activity carried out to investigate the potential of V-shaped holes for film cooling a high-pressure nozzle guide vane. The newly designed V-shaped scheme was compared with standard laidback fan-shaped holes. The influence of showerhead cooling was also assessed. Different injection conditions were examined under the same cascade operating condition using CO2 as a coolant. The quality of holes geometry and their discharging behavior was first characterized. Then, dual-luminophore pressure-sensitive paint (PSP) was used for measuring the adiabatic film cooling effectiveness all over the vane surface. Results of the current work showed that using a V-shaped hole configuration would give nearly the same surface protection as standard shaped holes with a reduced number of holes and, thus, at lower coolant flow consumption.

(2021). V-Shaped Holes for Full Coverage Film Cooling of a High-Pressure Nozzle Guide Vane [journal article - articolo]. In JOURNAL OF TURBOMACHINERY. Retrieved from http://hdl.handle.net/10446/206765

V-Shaped Holes for Full Coverage Film Cooling of a High-Pressure Nozzle Guide Vane

Barigozzi, Giovanna;Abdeh, Hamed;Rouina, Samaneh;
2021-01-01

Abstract

This paper describes an experimental activity carried out to investigate the potential of V-shaped holes for film cooling a high-pressure nozzle guide vane. The newly designed V-shaped scheme was compared with standard laidback fan-shaped holes. The influence of showerhead cooling was also assessed. Different injection conditions were examined under the same cascade operating condition using CO2 as a coolant. The quality of holes geometry and their discharging behavior was first characterized. Then, dual-luminophore pressure-sensitive paint (PSP) was used for measuring the adiabatic film cooling effectiveness all over the vane surface. Results of the current work showed that using a V-shaped hole configuration would give nearly the same surface protection as standard shaped holes with a reduced number of holes and, thus, at lower coolant flow consumption.
articolo
2021
Barigozzi, Giovanna; Abdeh, Hamed; Rouina, Samaneh; Abba, Luca; Iannone, Matteo; Odemondo, Vittorio
(2021). V-Shaped Holes for Full Coverage Film Cooling of a High-Pressure Nozzle Guide Vane [journal article - articolo]. In JOURNAL OF TURBOMACHINERY. Retrieved from http://hdl.handle.net/10446/206765
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/206765
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