CAJ | 학술논문

在化工泵、渣浆泵中高比转速离心叶轮的水力设计过程中，为提高叶轮的水力性能，必须在已确定的叶轮轴面投影图中绘型一条中间流线。在现有设计规范中，以一元理论确定这一中间流线时，需反复作图及试算以获取中间流线上若干节点的位置，同时在计算轴面液流过水断面面积时，长期采用近似方法。为改变叶轮设计过程中这种低效率、低精度的传统方法，本文以数学分析为基础，导出了中间流线上节点精确位置参数应满足的代数方程，并提供了快速求解这一超越代数方程的高级语言程序。
재화공빙、사장빙중고비전속리심협륜적수력설계과정중，위제고협륜적수력성능，필수재이학정적협륜축면투영도중회형일조중간류선。재현유설계규범중，이일원이론학정저일중간류선시，수반복작도급시산이획취중간류선상약간절점적위치，동시재계산축면액류과수단면면적시，장기채용근사방법。위개변협륜설계과정중저충저효솔、저정도적전통방법，본문이수학분석위기출，도출료중간류선상절점정학위치삼수응만족적대수방정，병제공료쾌속구해저일초월대수방정적고급어언정서。
In design process related to centrifugal impellers of medium or high specific speed used in chemical or slurry pumps , a medial streamline on accomplished meridional diagram of impeller should be formed , which is a common way to improve impeller per-formance.In present design practice , when 1-D theorem is applied, a trail-and-error way is employed to detect positions of some points on the streamline , and the whole procedure is performed by manual operation .Additionally , an approximate way is used to cal-culate the areas of cross sections of impeller passage flow .In order to upgrade the method in impeller design , the authors of this paper formulate an equation which depicts precious positions of steamline points and also offer a program based on QBasic to solve the equa -tion.