 In this study, an increase in the inlet temperature of gas turbines through continuous conduction mechanisms to achieve high specific thrust and thermal efficiency has been investigated. The temperature has risen beyond the component melting point. In order to delay and suppress the deterioration of components, a technique called film cooling is generally applied. Membrane cooling refers to the cooling gas injected from the holes forming a film on the outer surface of the component to block direct contact of hot gases. In this study, we analyzed the heat transfer characteristics according to the shape of the cooling hole causing the vortex. IR cameras and T-type thermocouples are used in the test section with an emissivity of 0.95 to measure film cooling. The angle of injection with respect to the surface is 35 ° and proceeded for compound angles of 0 °, 90 °, and 180 °. Experimental results show that the vortex-causing hole has a difference in film cooling efficiency from that of the simple hole. The shape of the hole changes the flow of cooling gas and affects the cooling characteristics of the component. Experiments on the characteristics of heat transfer with changes in the shape of cooling holes are suggested as a reference for increasing the efficiency of gas turbines.


Experimental Study on Thermal Characteristics of Rotating Air Flow in Film Cooling Holes

Division / Sponsor:
International Gas Turbine Institute (IGTI)

Paper Proceedings: https://asmedigitalcollection.asme.org/GT/GT2020/volume/84058

Turbo Expo - Virtual Conference

Supporting the need among researchers worldwide for additional online and multimedia content, ASME now offers the ASME Conference Video Collection. This platform will collect and provide long-term access to conference presentation videos, encompassing all technology areas within ASME's technical conference and events program. About 30,000-40,000 engineers across all mechanical engineering and related disciplines participate in ASME conferences each year. This includes authors of approximately 6,000 to 8,000 technical papers published by ASME, the majority of whom also submit video presentations for our virtual conferences. The video collection will be available as an add-on to existing product packages or as a separate subscription.