农业工程学报2011，Vol.27Issue(11)：71-77,7.DOI:10.3969/j.issn.1002-6819.2011.11.014
多种约束流道环境下的软性磨粒流流场特性
Flow field characteristics of soft abrasive flow in multiform restraint flow passages
摘要
Abstract
In order to solve the problem of material removal in some specific regions of workpiece in softness abrasive flow machining, a method based on designing different restraint component structure to control flow field in constrained flow passage was proposed. A dynamic model of solid-liquid two-phase abrasive flow oriented to SAFM was established for physical parameters analysis by using standard k-e model and Mixture model. Taking undulation and rectangle flow passages to be specific subject to emulate, some processing parameters were investigated, such as velocity and pressure. The results show that the value of turbulence kinetic energy in complex flow passage is larger than simple flow passage, so complex restraint components drive turbulence more random. Compared with rectangle flow passage, static pressure and dynamic pressure in the workpiece surface of undulation flow passage get increased and form differential pressure obviously according to the shape of restraint component. Processing parameters such as pressure, velocity, abrasive, incident angle, etc. Can be changed by different restraint component and different cross-sectional area in flow passage, and small eddy can be produced to enhance machining precision. The processing parameters can be selected on the basis of numerical simulation results which were partly proved by experiment.关键词
湍流模型/数值方法/动力学模型/软性磨粒流/约束模块/Mixture模型/边界层Key words
turbulence models/numerical methods/dynamic models/softness abrasive flow/restraint component/Mixture model/boundary layer分类
矿业与冶金引用本文复制引用
计时鸣,池永为,谭大鹏,唐波,李琛,付有志..多种约束流道环境下的软性磨粒流流场特性[J].农业工程学报,2011,27(11):71-77,7.基金项目
国家自然科学基金资助项目(50875242、50905163) （50875242、50905163）
浙江省自然科学基金资助项目(Z107517、Y1090836) （Z107517、Y1090836）
