UNSTEADY AERODYNAMICS OVER LP TURBINE BLADE

Abstract

To investigate the aerodynamic coefficients for various Re and α values. For the analysis, three different Reynolds numbers and ten different AOA values were used. ICEM-CFD was used to construct the geometry and grid. For several examples of Re and α, captured the creation of a Laminar Separation Bubble. The phenomenon of flow separation was documented via a computational fluid dynamics (CFD) study. CFD study carried out in NACA 4412 airfoil. The airfoil's chord length is 0.1 m. Ansys Fluent software was used to do a 2-D steady state and transient analysis. For various Reynolds numbers, plotted Coefficient of Lift vs AOA, Coefficient of Drag vs AOA, and Coefficient of Pressure vs AOA. CFD results validated from the experimental results performed by K. Koca et al. / Energy 144 (2018). The research was expanded to include a three-blade Turbine blade cascade. The research was done on a NACA 4412 airfoil. The chord length of the airfoil is 0.192 m. Three distinct Reynolds numbers and four different AOA values were employed in the analysis. Coefficient of Pressure versus AOA was plotted for various Reynolds values. The production of a wake and its effect downstream from the trailing edge were captured.