Abstract
As a kind of nano machining technology, abrasive flow polishing technology plays an important role in precision machining region. As an important numerical simulation method in fluid mechanics, large eddy numerical simulation method has become an important method for many scholars to study abrasive grain polishing technology. In this paper, the use of fluid mechanics software FLUENT and selected Mixture mixed model. Based on the theory of solid-liquid two-phase flow dynamics, the large-eddy numerical simulation method was used to study the polishing process of T-tube abrasive flow, and the micro-machining mechanism of abrasive-polished workpiece was discussed. The influence of the different inlet velocities on the polishing effect of the abrasive grains was discussed by analyzing the numerical simulation results of the different inlet velocities of the abrasive grains during the processing of the T-tube.
Highlights
T-tube applications are very extensive, it is an indispensable part of the manufacturing products and the quality of its internal surface affect the performance and life of parts [1, 2]
Based on the large eddy simulation method, and the numerical simulation is carried out according to the actual size parameters of the T-tube and the polishing condition of the abrasive flow
A lower port of the T-tube is selected as the inlet of the abrasive flow, and the upper port and the other lower port are the abrasive flow outlet
Summary
T-tube applications are very extensive, it is an indispensable part of the manufacturing products and the quality of its internal surface affect the performance and life of parts [1, 2]. Due to the complexity of the internal channel structure of the T-tube, it is difficult to carry out high-quality grinding on its inner surface by using a traditional polishing method. With application of abrasive grain polishing technology, you can get high - quality polishing surface [3, 4]. The abrasive grain polishing medium is the solid-liquid two-phase flow, which is a complex form of turbulent motion. The main role of small-scale eddy is dissipative, and the small - scale eddy is indirectly generated by the nonlinear interaction between large-scale eddies. It has little effect on the average flow and is closer to isotropic [10]. The large-scale eddies in the turbulence are directly simulated by the instantaneous N-S equation, and the effect of the small-scale eddy on the large-scale eddy and the whole flow field is solved by establishing the sub-lattice model [11, 12]
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