%0 Journal Article
%T 基于迭代算法的磨料颗粒加速机制研究
%A 左伟芹
%A 王晓川
%A 郝富昌
%A 卢义玉
%A 刘明举
%J 中国石油大学学报(自然科学版)
%D 2016
%R 10.3969/j.issn.1673-5005.2016.04.013
%X 在前混合射流磨料加速机制研究中一般将阻力系数当作常数且忽略巴西特力的影响。针对这一问题,采用实时对比插值法分析阻力系数且考虑巴西特力对磨料加速的影响,在此基础上建立磨料运动微分方程,并通过迭代算法进行求解,较为全面、准确地阐释磨料加速机制。结果表明:在管道及喷嘴直线段内磨料受力由大到小分别为黏性阻力、巴西特力、视质量力,在喷嘴收敛段内磨料受力由大到小分别为压强梯度力、视质量力、黏性阻力、巴西特力,且全程中巴西特力都有不可忽略的影响;在喷嘴收敛段前半段磨料加速度大于液相加速度,在收敛段后半段磨料加速度略小于液相加速度,在喷嘴直线段内磨料加速趋缓。</br>It has been reported that the resistance coefficient was treated as constants and the basset acceleration force was often ignored on the acceleration mechanism of abrasive in pre-mixed abrasive water-jet. Aiming at this issue, the contrast analysis of real-time interpolation method were used to analysis the viscous resistance coefficient and the influence of basset force on the abrasive acceleration was considered. And the differential equation of motion for abrasive was established, which was solved by the iterative algorithm. The research results show that the forces acting on abrasive from large to small is as follows:viscous resistance, basset acceleration force, and apparent mass force in the high pressure pipe and the straight line segment of nozzle. The forces acting on abrasive from large to small is as follows:pressure gradient force, apparent mass force, viscous resistance, and basset acceleration force in the convergence segment of nozzle, in which the basset acceleration force plays an important role in the whole course. The acceleration of abrasive is faster than liquid in front half part of the convergence segment. However, in behind half part of the convergence segment the acceleration of abrasive is slower than liquid, and abrasive accelerates slowly in the straight line segment
%K 前混合磨料射流 加速机制 巴西特力 迭代算法&lt
%K /br&gt
%K premixed abrasive jet acceleration mechanism basset acceleration force iterative algorithm
%U http://zkjournal.upc.edu.cn/zgsydxxb/ch/reader/view_abstract.aspx?file_no=20160413&flag=1