Open AccessA REVIEW OF HEAT TRANSFER AND PRESSURE LOSS CHARACTERISTICS THROUGH CONVECTIVE COOLING METHOD FOR GAS TURBINE THERMAL MANAGEMENT
Author(s) -
Divya Bihari,
Sanjay Bok
Publication year - 2019
Publication title -
international journal of engineering applied science and technology
Language(s) - English
Resource type - Journals
ISSN - 2455-2143
DOI - 10.33564/ijeast.2019.v04i04.008
Subject(s) - gas turbines , convective heat transfer , heat transfer , nuclear engineering , mechanics , convection , materials science , thermodynamics , thermal , environmental science , mechanical engineering , engineering , physics
Elevated temperatures in gas turbine operation exceeds the allowable temperature of the metal alloys used for turbine blades and combustor liners. Thus effective cooling strategies must be implement to ensure safe and efficient operation of gas turbines. Heat transfer enhancement can be achieved by increasing either the surface area or the heat transfer coefficient. Flow turbulence promoters such as ribs, dimples and protrusions induce a disturbance to the flow boundary layer. This lead to a regular separation and re-attachment of the near wall flow field, thus increasing the heat transfer coefficient. A number of geometric parameters like channel aspect ratio, rib-configurations, rib-orientation, blockage ratio, rib spacing, dimples and protrusions shape; depth and height have been investigated for cooling channels. The present study is aimed to review the investigation of these parameters on the heat transfer and pressure drop characteristics of cooling channels incorporated with turbulence promoters found in backside cooling of gas turbine combustor liner and internal cooling