Processing Theoretical Research And Numerical Simulation Analysis Based On The Free State Of Flexible Liquid-solid Two Phase Abrasive Flow

Liquid-solid two-phase turbulent flow is widely used in mining, metallurgy, electric power and coal industries, the research are also more and more closely. Mould manufacturing involves a large number of groove, slot, hole, prism, pyramid and narrow special-shaped surface called structural surface. Based on these characteristics, we put forward the liquid-solid two-phase "soft" abrasive flow processing methods. By the establishment of the model about the two phase abrasive flow turbulent, the work-piece can realize precise machining. Mirror surface machining of the work-piece is realized mainly through the following macro-conditions and micro-conditions:Firstly in the macro, constructing constrained flow channel in the structural surface of the work-piece can form special abrasive flow channel. Using the soft abrasive flow characteristic of weak or non-sticky features and the restrict to the flow channel, the high-speed abrasive flow can easily form turbulent. So that the flow channel wall surface as a binding part of the structural surface is subjected to erosion, micro-cutting in order to make the work-piece achieve precision finishing. This article is aimed at certain mould shapes of structural surface, designing corresponding constraints modules, forming a certain flow channel with particular channel section shape.Secondly in the micro level, mainly through the turbulence influenced by the particle-phase pressure the two-phase flow velocity, using particle cutting wear and tear of frequent alternation, finally the mechanical action is changed by the sliding rubbing, plowing and cutting of the solid-phase.This paper mainly includes the following sections:1.This paper describes some theoretical approaches and research significance according to the adoption of liquid-solid two phase soft abrasive flow on the work-piece precision finishing. Combing domestic and abroad two-phase study, the paper proposed the machining mechanism based on liquid-solid two-phase soft abrasive flow and analyzed the machining principles. Combining the theory and the practical significance, we design a new experimental platform and binding modules.2.Aiming to the establishment of all kinds of two-phase flow theoretical model, the paper analyzed multiphase flow model and numerical methods. At the same time, it also analyzed the basic theory of two-phase soft abrasive. Besides, the paper put forward the micro-particles cutting process models making use of CFD (FLUENT and GAMBIT) software to simulate the speed field and pressure field numerical simulation of the flow channel.3.Through theoretical analysis, we clearly state that during the machining process of the free liquid-solid two-phase soft abrasive flow, the pressure, velocity, and particle effects are the key factors to the machining effective; Through numerical simulation, the paper studied and analyzed the visual graphic images. In other words, the paper systematically and fully analyzed the effects on the wall of speed, pressure, and particle volume concentration during processing effects.