Abstract
For the problem affected by speed and uneven grinding in abrasive flow with non-linear pipe, the T-tube is regarded as the research object, the numerical simulation of the flow state of the abrasive flow under different inlet velocities is carried out by using the large eddy simulation (LES). The dynamic pressure, turbulent kinetic energy, turbulence intensity and wall shear force under different inlet conditions are compared and analyzed. We can see from the numerical analysis that with the increase of inlet velocity, the dynamic pressure, turbulent kinetic energy, turbulence intensity and wall shear force also increase, and the polished effect is improved. The surface roughness and surface morphology of the T-tube workpiece before and after polished of abrasive flow are measured, the surface roughness decreased from 3.633 μm to 1.201 μm. Therefore, the effectiveness of the abrasive flow polished inner channel structure is confirmed, Also the credibility of numerical analysis is verified and provides theoretical support for the development of abrasive flow polished technology.
Highlights
In the increasingly technological development today, the precision of mechanical parts is put forward higher requirements by all fields
Due to the traditional processing methods have a natural drawback for miniaturized parts, especially the micro-hole, cross-hole structure, there are obvious limitations appearing in the traditional processing technology
Abrasive flow machine (AFM) is a new processing technology, whose mechanism is that put solid-liquid two-phase abrasive that solid particles suspended in the liquid medium under external pressure through the inner surface of complex structural parts, after repeated grinding processing, the higher accuracy requirements can be achieved
Summary
In the increasingly technological development today, the precision of mechanical parts is put forward higher requirements by all fields. Abrasive flow machine (AFM) is a new processing technology, whose mechanism is that put solid-liquid two-phase abrasive that solid particles suspended in the liquid medium under external pressure through the inner surface of complex structural parts, after repeated grinding processing, the higher accuracy requirements can be achieved. The LES model and the SIMPLE algorithm are used, 20 % silicon carbide particles and hydraulic oil are used as the two-phase flow materials, boundary conditions select speed entrance and free exit. Both of the inlet 1 and inlet 2 have the same speed.
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