Swirling Flow Computation at the Trailing Edge of Radial-Axial Hydraulic Turbines

Computation of trailing edge noise from an incompressible flow calculation

A new methodology for calculating low Mach number trailing edge noise is developed and tested. The input to this methodology is the fluctuating surface pressure obtained from an incompressible, turbulent flow calculation. The surface pressure is used to calculate an intermediate incident pressure. This pressure in conjunction with the sound-hard boundary condition yields the scattered pressure ...

Endwall Film-Cooling in Axial Flow Turbines

Computation of Trailing Edge Noise with a Discontinuous Galerkin Method

Trailing edge noise of a semi-infinite, thin, flat plate situated in low Mach number flow is computed in two spatial dimensions. The Acoustic Perturbation Equations (APE), which are employed as governing equations, are discretized via a Discontinuous Galerkin Method (DGM). Results are compared with theory and Finite Difference (FD) computations. Next to the radiated sound field, special attenti...

Trailing Edge Noise Computation of a Fan Blade Profile

Julien Christophe, Stéphane Moreau, Jérome Anthoine 1 von Karman Institute for Fluid Dynamics, 72 Chaussée de Waterloo, 1640 Rhode-St-Genèse, Belgium, [email protected] 2 Université de Sherbrooke, 2500 Boulevard de l’Université, Sherbrooke, J1K 2R1 Québec, Canada, [email protected] 3 ONERA The French Aerospace Lab, Midi-Pyrenees Center, Mauzac, France, Jerome.Anthoine@one...

Hydraulic Resistance and Flow Pattern at Design and Off Design Flow Rates Among Axial Flow Machines

In an axial flow machine, fluids flow condition, that is flow pattern in a rotating flow passage changes its form and magnitude by the hydraulic resistance to the fluid flow in flow passage. Effect of centrifugal force becomes stronger with the increase of hydraulic resistance, and the flow rate becomes smaller. And, in the comparison of fluids flow condition among different axial flow machines...