CAJ | 학술논문

针对目前粉体混合研究中试验方法在三维流场的局限性，利用流体动力学软件 FLUENT 模拟了卧式螺带混合机的三维流场。通过简化建立了混合机三维模型，选择标准k-ε湍流模型及混合多相流模型对混合机内部流动进行仿真，选择输运模型计算示踪剂浓度。同时，重点分析了速度分布云图和体积分布云图，验证了物料在内外螺带区域的轴向和径向速度方向均相反，且物料在外螺带区域速度＞内螺带区域速度，通过体积分布云图可方便监测物料瞬态分布状态。通过分析示踪剂的质量分数变化，得出了经过55 s 物料即可混合均匀，验证了该混合机的高效率，该研究结果为进一步改进混合机性能提供了理论依据。
침대목전분체혼합연구중시험방법재삼유류장적국한성，이용류체동역학연건 FLUENT 모의료와식라대혼합궤적삼유류장。통과간화건립료혼합궤삼유모형，선택표준k-ε단류모형급혼합다상류모형대혼합궤내부류동진행방진，선택수운모형계산시종제농도。동시，중점분석료속도분포운도화체적분포운도，험증료물료재내외라대구역적축향화경향속도방향균상반，차물료재외라대구역속도＞내라대구역속도，통과체적분포운도가방편감측물료순태분포상태。통과분석시종제적질량분수변화，득출료경과55 s 물료즉가혼합균균，험증료해혼합궤적고효솔，해연구결과위진일보개진혼합궤성능제공료이론의거。
In the current study of powder mixing , there are some limitations of test method in three-dimensional flow field.This paper uses fluid dynamics software FLUENT to simulate the flow field of horizontal ribbon mixer .Through sim-plified the three-dimensional mixer model ,select the standard k -ε turbulence model and mixture model to simulate the internal flow of the mixer , select transport model to calculate the tracer concentration .From the velocity contours and vol-ume distribution cloud , it verifies that the material axial and radial velocity in the outer and inner ribbon regions are op-posite , and the speed in the outer spiral band area region is faster than inner ribbon reigon .By volume distribution it is easy to monitor the transient distribution of the material .Through analyzing the change of the mass fraction of tracer , it can be obtained in about 55 s to mix evenly which verify the high efficiency of the mixer .The research provides a theoreti-cal basis to improve the performance mixer in the further study .