FEC were engaged to complete the computational fluid dynamics (CFD) analysis of the primary air flow meters in a fan duct. The duct supplies a mixture of pulverised coal and primary air to the furnace.

The client was concerned about the accuracy and validity of the measured flow data in the duct, which indicated a potential velocity distribution issue. This data was important for boiler combustion tuning.

The purpose of the analysis completed by FEC was to provide the following data to the client:

  • Upstream aerofoil velocity profile
  • Pressure distribution on aerofoil and sensing ports
  • Pressure differential between low- and high-pressure manifolds/ports
  • Compare calculated pressure differentials against measured values

FEC developed a detailed CFD model of the duct with client-supplied flow inputs. Detailed velocity and pressure profiles were provided to the client to enable calibration of the primary air flow and to improve combustion in the furnace. The work enabled the client to visualise and improve the calibration model in a situation where physical testing wasn’t possible (due to access).