Notice of RetractionCFD simulation with fluent and experimental study on the characteristics of spool valve orifice

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 computational fluid dynamics (CFD) has been showing a good prospect for the past decade. CFD is widely used for it can help people understand cavitation from the Micro-level and it can provide the scientific means to describe the mechanism of fluid vibration. Cavitation flow can result in annoying, unbearable noise and high vibration, and reduce the mechanical efficiency. Thus, computational simulation with Fluent on the characteristics of spool valve orifice is performed. This flow through orifice is turbulent, incompressible and unsteady. Flux is the main characteristic in valve chamber, and separation phenomena occurred at valve orifices and some vortexes formed in chamber. In addition, further studies show that the region of cavitation is affected by some parameters such as different pressure across the orifice, the dimension of valve opening and so on. Then, a flow visualization cavitation experiment of cylinder valve is developed. The dimension of valve opening is adjusted by using linear stepping motor. The upstream and downstream pressures are measured by using pressure transducers. Cavitation images are captured by using a high-speed camera.