CAJ | 학술논문

湍流发生器是离心式中浓纸浆泵的关键部件，其作用是使纸浆实现流体化并进行气液分离。本文提出一种采用等螺距和变螺距相结合的叶片型线的湍流发生器，推导了其型线方程。为了验证新设计叶片型线湍流发生器的性能，设计了4种不同叶片型线的湍流发生器。基于CFX软件，采用Eeulerian气液两相流模型和RNG k-ε湍流模型，模拟了不同叶片型线的湍流发生器中浓纸浆悬浮液的三维流场，预测了水力性能和气液分离效果，分析了不同叶片型线对湍流发生器性能的影响。结果表明，采用等螺距和变螺距相结合的叶片型线的湍流发生器具有较好的水力性能和气液分离效果。该模型在生产实际中得到了应用。
단류발생기시리심식중농지장빙적관건부건，기작용시사지장실현류체화병진행기액분리。본문제출일충채용등라거화변라거상결합적협편형선적단류발생기，추도료기형선방정。위료험증신설계협편형선단류발생기적성능，설계료4충불동협편형선적단류발생기。기우CFX연건，채용Eeulerian기액량상류모형화RNG k-ε단류모형，모의료불동협편형선적단류발생기중농지장현부액적삼유류장，예측료수력성능화기액분리효과，분석료불동협편형선대단류발생기성능적영향。결과표명，채용등라거화변라거상결합적협편형선적단류발생기구유교호적수력성능화기액분리효과。해모형재생산실제중득도료응용。
Turbulence generator is a key component of medium centrifugal pulp pump ,which fluidizes the medium consistency pulp and separates the gas from the pulp suspension .A new kind of blade pattern of turbulence generator was put forward which combines uniform pitch with variable pitch .The equation of the blade pattern was also deduced .In order to verify the performance of the turbulence generator with new blade pattern ,four turbulence generators with different kinds of blade patterns were designed respectively .Based on CFD ,RNG k-εturbulence model and Eulerian gas -liquid two phase flow model were used to numerically simulate the gas-liquid two-phase medium consistency suspension flow inside the four turbulence generators by CFX software . Then the hydraulic performances of turbulence generators were forecasted , and the influence of blade patterns on the hydraulic performance were analyzed .By comparing the gas distribution of flow field in the turbulence generators on the surfaces and sec -tions of the turbulence generator ,this research analyzed the effect of gas -liquid separation of the four turbulence generators .The results show that the turbulence generator with a new blade pattern which combines uniform pitch with variable pitch screw has better hydraulic properties and gas -liquid separation effect .The turbulence generators with the new blade pattern are actually ap-plied in the paper making industry .