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Geometry affects boron carbide nozzles


Geometry affects boron carbide nozzles :

The influence of the geometry of the boron carbide nozzle on the cavitation flow has received extensive engineering attention because it is directly related to the design of the cone-shaped boron carbide nozzle.
The fillet at the orifice of the nozzle often affects the formation of the recirculation zone near the throat of the nozzle; when the radius of the corner increases, the length of the inlet flow separation zone will decrease, which suppresses the development of turbulence to a certain extent.
The aspect ratio of the orifice of the boron carbide nozzle is often closely related to the flow loss of the internal flow of the orifice; the effect of the aspect ratio of the orifice on the cavitation flow has long been the focus of scientific and technological personnel.
The experimental results show that, unlike the symmetric nozzles, flow separation often occurs at the exit of the asymmetric nozzles, and the cavitation area is not symmetrical, occupying only part of the wall surface of the nozzles. In addition, there is a high probability of partial hydraulic backflow inside the asymmetric nozzle.
The roughness of the wall surface of the nozzle of the boron carbide nozzle often causes high shear stress to flow near the wall surface, and then affects the velocity field and pressure field near the wall surface.

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