Abstract
Increase in ambient atmospheric temperature significantly reduces the thermal output of gas turbines. Inlet fogging is one of the power augmentation technique which is used to increase the power output of gas turbines. In this study, experimental work on the characteristics of a liquid film on to the surface of cascade blade is reported. Shadowgraph images of different regimes of the thin liquid film formed on the cascade blade were taken at different air flow conditions. It was observed that air flow velocity on the blade’s surface significantly affects the instability and thickness of the liquid’s surface, while blade’s angle of attack was found to enhance the instability pattern due to the flow separation on the blade’s surface. From the experimental results, it is concluded that the height to width ratio of liquid film thickness remains constant at a particular angle of attack and air flow velocity, and remained unchanged with the change in the mass flow rate of the liquid.
