• Analysis induced draft fan: Rotor reconstructed from optical measurements and abs. velocity (unsteady CFD)

  • Flow in the vane control (45° position) and inlet chamber

  • High grid quality structured meshing, full setup contains ~17 million cells

  • Comparison of calculated performance shows good agreement with manufacturers design performance map

  • Flow seen from the rotor (left hand side) and from a stationary frame of reference (right hand side)

Simulation and analysis of a large induced draft fan for power plant applications. Using data of an optical measurement the 3D geometry of rotor and casing is reconstructed. High quality steady and unsteady CFD simulations show good agreement with the manufacturers design performance map. The simulation provides an insight view of the flowfield and detects a flow separation at the rotor as a major source of losses.

 

  • Optimization radial fan: CFD validation of base design

  • Parametrization of blade geometry for application in an automated optimization process

  • Increase in efficiency by a multiobjective optimization at several operating points

Starting from a CFD validation of the base design the efficiency of a radial fan is set to be improved. Initially the blade geometry is described in aero_designworks geometry generation environment. The parameter based geometry description is crucial for the application of automated optimization. In the multiobjective optimization along with the efficiency in two operating ponts the pressure rise is considered.