Euler Analysis Simulation and Evaluation of Rotor-IGV Interaction Unsteady Aerodynamics

Abstract

Three-dimensional linearized solvers are being developed to predict the multiblade row unsteady aerodynamics that drive HCF. However, to take advantage of the significant computational timesavings offered by linearized analyses, it is imperative that they be validated with appropriate benchmark data prior to turbomachinery design utilization. This paper addresses this need for LINFLUX-3D, a three-dimensional linearized Euler solver. This task is accomplished by simulating the unsteady flow through the IGV's generated by a downstream rotor. The 1GV steady flow and the rotor-lGV interaction generated unsteady aerodynamics on the IGV row are predicted for both a subsonic and transonic rotor condition. These simulations are then correlated with corresponding benchmark data, including both 90% span IGV surface steady and unsteady pressures and the IGV passage flow field. Nomenclature SuperscriptsAbstract bij Dirac delta δ, difference operator, () -() E, total internal energy fi unsteady flux vector, j direction