本文選題：FLUENT + 橢圓螺旋管道混合器�。� 參考：《機(jī)械科學(xué)與技術(shù)》2017年05期

【摘要】：應(yīng)用CFD技術(shù)研究了橢圓螺旋流道內(nèi)兩相液體在充分發(fā)展條件下的混合效果。基于FLUENT軟件,對(duì)混合性能進(jìn)行了數(shù)值模擬研究,討論了橢圓螺旋管道混合器的截面形狀、曲率半徑、螺距3種因素對(duì)該混合器混合效果的影響。模擬所得液相的流動(dòng)狀態(tài)與實(shí)驗(yàn)結(jié)果具有很好的一致性。提取相應(yīng)截面液體的混合不均勻系數(shù),分析結(jié)果表明:截面形狀的變化會(huì)給螺旋管道混合器造成不同程度的狹小區(qū)域,對(duì)混合均勻性影響較大;增加螺距會(huì)對(duì)混合產(chǎn)生消極的影響;當(dāng)曲徑為某一特征值時(shí),混合效果可達(dá)到最好狀態(tài);同時(shí),通過仿真分析得出,液體流速的改變對(duì)混合器中液體的混合效果影響不大;通過對(duì)流場(chǎng)內(nèi)部剪切速率、流線、質(zhì)點(diǎn)速度場(chǎng)的分析,討論了粒子無序運(yùn)動(dòng)是螺旋混合器內(nèi)液體充分混合的關(guān)鍵因素。
[Abstract]:The mixing effect of two-phase liquid in the elliptical spiral channel was studied by CFD technique under the condition of full development. Based on FLUENT software, the mixing performance is numerically simulated, and the influence of three factors, such as section shape, curvature radius and pitch, on the mixing effect of the elliptical spiral pipe mixer is discussed. The flow state of the simulated liquid phase is in good agreement with the experimental results. The analysis results show that the change of cross section shape will cause a narrow area to different extent for the helical pipe mixer, which has a great influence on the mixing uniformity. Increasing pitch will have a negative effect on mixing, when the curved diameter is a certain eigenvalue, the mixing effect can reach the best state. At the same time, the simulation analysis shows that the change of liquid velocity has little effect on the mixing effect of liquid in mixer. Through the analysis of the shear rate, streamline and particle velocity field in the flow field, it is discussed that the disordered motion of particles is the key factor for the sufficient mixing of liquid in the helical mixer.
【作者單位】： 西安理工大學(xué)機(jī)械與精密儀器工程學(xué)院;
【分類號(hào)】：TQ027.1

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