CAJ | 학술논문

为了提高叶片式抛送装置的输送效率、增加抛送距离，通过理论分析建立了出料管内物料运动的数学模型；基于此模型采用计算流体力学软件Fluent 中的欧拉－拉格朗日法对抛送装置内气固两相流动进行数值仿真，并将仿真结果与高速摄像实测结果比较验证其可靠性；在分析了物料运动规律基础上，对出料管截面形状、出料直管段高度及弯管段形状的不同变化进行了对比模拟。研究结果表明：圆形截面出料管最合理，方形截面次之，矩形截面最不合理；出料直管高度的最佳取值区间为[500，1000] mm；弯管上壁为两段圆弧结合较一段圆弧阿基米德螺线、对数螺线及水平轴抛物线等更有利于输送物料。
위료제고협편식포송장치적수송효솔、증가포송거리，통과이론분석건립료출료관내물료운동적수학모형；기우차모형채용계산류체역학연건Fluent 중적구랍－랍격랑일법대포송장치내기고량상류동진행수치방진，병장방진결과여고속섭상실측결과비교험증기가고성；재분석료물료운동규률기출상，대출료관절면형상、출료직관단고도급만관단형상적불동변화진행료대비모의。연구결과표명：원형절면출료관최합리，방형절면차지，구형절면최불합리；출료직관고도적최가취치구간위[500，1000] mm；만관상벽위량단원호결합교일단원호아기미덕라선、대수라선급수평축포물선등경유리우수송물료。
In order to increase the blowing efficiency of the impeller blower and its throwing distance , the theoretical a-nalysis method was used to establish the mathematical models of the materials moving along the discharge spout of the im -peller blower .Based on these mathematical models three-dimensional simulation was performed for the solid-gas two-phase flow in the impeller blower by using FLUENT software with Discrete Phase Model ( DPM) .Comparisons between simulated values and measured values of materials velocity at the curved spout by high -speed video were made , and the reliability of the numerical simulation was verified .Meanwhile , contrast simulations on variations in structural shape pa-rameters of the discharge spout such as cross-section shapes , straight spout heights and curvature shapes of the curved spout wall were carried out .It was concluded that:1 ) The spout with round section was superior to the one with square or rectangular section for blowing;2 ) The computed results showed that the length of the straight spout should be in the range of [500mm, 1000mm];3) The spout with two curvatures radii of 1500 and 5000mm was more reasonable.