NUMERICAL SIMULATION OF INCOMPRESSIBLE TWO-BLADE ROTOR FLOWFIELDS

The incompressible e owe eld of a two-blade rotor with untapered, untwisted, aspect-ratio-six blades is computed. The artie cial compressibility formulation of the incompressible-e ow equations is chosen for the numerical solution. Time integration is performed implicitly and space discretization is obtained with an upwind-biased scheme. The numerical method is implemented on a multiblock solver where turbulent e ow can be computed by both algebraic and one-equation models. The e owe eld is computed on a halfrotor cone guration by imposing periodicity conditions in the azimuthal direction. The numerical mesh over the blade consists of three distinct blocks and is wrapped on a cylindrical surface. Turbulence is modeled with a one-equation turbulence model. Comparisons of the computed results with available experimental data are presented.

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