Notice of RetractionNumerical and experimental investigation on centrifugal fan with a vortex-broken device

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

The flow field of the G4-73 centrifugal fan was numerically simulated with the software of Fluent. The numerical results show that large-scale vortex in volute were push forward, and the scale and intensity of vortex change in different circumferential cross section of the volute. A vortex-broken device was designed based on the idea of decrease flow loss and vortex noise through breaking large-scale vortex. Experimental results show that after the device was added, when relative flow more than 45%, total pressure increase significantly and high efficiency area broaden. Total pressure nearly increases 44 Pa at the design flow, and the efficiency average increases 3% when relative flow is 85%~100%. The device has a guiding significance of energy-saving for power plant.