發(fā)布時(shí)間：2018-07-06 09:01

  本文選題：顆粒縮放 + 垂直螺旋��； 參考：《過程工程學(xué)報(bào)》2017年05期

【摘要】：利用相似理論和量綱分析進(jìn)行顆�？s放,將粒徑0.5 mm的鑄鐵煤粉顆粒放大至2 mm,進(jìn)行虛擬實(shí)驗(yàn)標(biāo)定放大顆粒的基本接觸參數(shù),用離散單元模型模擬垂直螺旋輸送中的顆粒運(yùn)動(dòng),驗(yàn)證顆粒縮放法的準(zhǔn)確性.結(jié)果表明,螺旋轉(zhuǎn)速為500,550,600,650 r/min時(shí),顆粒軸向速度和圓周速度增大,最大軸向速度位于中上部,處于葉片邊緣,分別為0.486,0.535,0.596,0.657m/s,超過螺旋葉片半徑區(qū)域的顆粒軸向速度明顯減小;相同填充率下,裝置出口處質(zhì)量流率、顆粒軸向速度模擬值和實(shí)驗(yàn)值基本吻合,滿足相似理論.
[Abstract]:By using similarity theory and dimension analysis, the particle size of cast iron pulverized coal is enlarged to 2 mm, and the basic contact parameters of the amplified particle are calibrated by virtual experiment. The particle motion in vertical spiral conveying is simulated by discrete element model. Verify the accuracy of particle scaling method. The results show that the axial velocity and circumferential velocity of the particles increase when the helical speed is 500550600650 r/min, and the maximum axial velocity is located at the middle and upper part of the blade, which is at the edge of the blade. The axial velocity of the particles over the radius of the helical blade decreases obviously. At the same filling rate, the mass flow rate and particle axial velocity at the outlet of the device are in good agreement with the experimental data, which satisfies the similarity theory.
【作者單位】： 浙江工業(yè)大學(xué)能源與動(dòng)力工程研究所;
【基金】：浙江省公益性技術(shù)應(yīng)用研究計(jì)劃項(xiàng)目(編號:2014C31023)
【分類號】：TH224

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本文編號：2102260