Wheel must be used with safety guards. The actual rotational axis of the wheel and its axis of rotation through the center of mass deviation from parallel state called static unbalance wheel. This is usually due wheel uneven density, both ends of the hole and the surface is not parallel or coaxial cylindrical deviation has caused.
2013年10月16日星期三
Wells abrasive jet cutting seam, sew the body fluid in the flow
Abrasive jet cutting seam technology is developed in an eighty year-end for releasing pollution and expand the near-wellbore permeability reservoir permeability of the new technology , with a penetration depth , no secondary pollution, the discharge area, the effect is significant construction and so on. But there are still many problems with the air compared to the free water jet , underwater jet
synthetic diamond is also less . Especially for submerged conditions, high-speed non-free two -phase jet theory needs further study. The abrasive jet wells slotted body fluid flow at the seam , the movement of the solid particles ,
synthetic diamond powder changes with time , the second return and the jet of fluid as the direction along the kerf attenuation rate few studies . To solve the above problems , this paper uses a theoretical and numerical investigation of the combination of research methods. The use of two -phase jet theory and Diamond blade fluid dynamics and other basic knowledge , analysis wells abrasive jet slotting two-phase fluid motion mechanism . Gambit pre-processing software application , based on test results to establish the ground and underground seam 2D and 3D model of the body . Based on FLUENT software carried out on the two-dimensional numerical simulation of abrasive jet slotting process provides a theoretical basis and experimental evidence .
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