가스터빈; 막냉각; 비등각 격자; 전산유체역학; 격자 의존성; Gas Turbine; Film Cooling; Non-conformal Mesh; CFD; Grid Independence
Issue Date
2013-12
Publisher
대한기계학회
Citation
대한기계학회 2013년도 학술대회, Vol.-, No.- [2013], p991-996
Abstract
The turbine blade experiences a harsh thermal environment. To maintain the integrity of the blades, improved coolant design are required, film cooling being one of them. The CFD tool is used for designing the film cooled blade. However generating meshes based on hexahedral elements, which are often associated with accuracy solutions, is very time consuming task due to complexity of geometry. The objective of this paper is to better establish the effects of mesh generation techniques on film cooling. In order to achieve this objective, non-conformal mesh has been considered using discrete jet on a flat plate film cooling. Mesh density and interface location of non-conformal mesh influence on adiabatic film cooling effectiveness were presented. The Numerical results were compared to experimental data for validation.