基于CFD-DEM耦合的揉絲機(jī)排料裝置內(nèi)物料運動模擬與試驗
發(fā)布時間：2018-08-05 16:29
【摘要】：為解決傳統(tǒng)物理方法難以對揉絲機(jī)排料裝置內(nèi)物料運動進(jìn)行可視化研究的問題,基于CFD-DEM氣固耦合法,采用RNG K-ε湍流模型及Euler-Lagrange耦合算法對揉絲機(jī)不同主軸轉(zhuǎn)速下排料裝置內(nèi)物料運動過程、內(nèi)流道氣流速度分布、氣流對物料的耦合力分布進(jìn)行了數(shù)值模擬,并對風(fēng)扇主軸轉(zhuǎn)速3 000r/min時物料運動過程進(jìn)行分區(qū)域研究。結(jié)果表明:在風(fēng)扇主軸額定轉(zhuǎn)速3 200r/min范圍內(nèi),主軸轉(zhuǎn)速2 000、2 500和3 000r/min在模擬結(jié)束時分別排出物料數(shù)量為6 191、6 669和7 161個;不同區(qū)域內(nèi)物料平均速度形成梯度分布,由大到小依次為物料出口區(qū)域(10.00m/s)、風(fēng)扇轉(zhuǎn)動區(qū)域(6.00m/s)、物料入口區(qū)域(0.87m/s);風(fēng)扇轉(zhuǎn)動區(qū)域氣流速度最大(峰值50.00m/s),對物料耦合力作用最強(qiáng),物料入口區(qū)域則耦合力最小;物料在入口區(qū)域內(nèi)數(shù)量最多并在模擬結(jié)束時發(fā)生少量堆積,在出口區(qū)域未見回流現(xiàn)象發(fā)生。對模擬結(jié)果進(jìn)行了試驗驗證,結(jié)果表明利用CFD-DEM氣固耦合法對揉絲機(jī)排料裝置內(nèi)物料運動進(jìn)行可視化研究是可行的。
[Abstract]:In order to solve the problem that it is difficult for traditional physical methods to visualize the movement of materials in the discharging device of kneading machine, the gas-solid coupling method based on CFD-DEM is used to solve the problem. RNG K- 蔚 turbulence model and Euler-Lagrange coupling algorithm are used to simulate the material movement, velocity distribution and coupling force distribution at different spindle speeds. The material movement process of fan spindle at 3 000r/min was studied in different regions. The results show that in the range of 3 200r/min rated speed of the fan spindle, the quantity of materials discharged at the end of the simulation is 6191 / 2669 and 7.161 respectively at the end of the simulation, and the average velocity of the materials in different regions forms a gradient distribution. The order from big to small is material outlet region (10.00m/s), fan rotation area (6.00m/s), material inlet area (0.87m/s), fan rotation region has the largest airflow velocity (peak 50.00m/s), and has the strongest effect on material coupling force, while the material inlet area has the smallest coupling force. The material quantity is the most in the entrance area and a small amount of accumulation occurs at the end of the simulation, but no reflux occurs in the exit area. The experimental results show that it is feasible to use CFD-DEM gas-solid coupling method to visualize the movement of materials in the discharging device of the kneading machine.
【作者單位】： 甘肅農(nóng)業(yè)大學(xué)工學(xué)院;中國農(nóng)業(yè)大學(xué)工學(xué)院;
【基金】：國家“十二五”科技支撐計劃項目(2012BAD14B10)
【分類號】：S817.12
，
本文編號：2166347
[Abstract]:In order to solve the problem that it is difficult for traditional physical methods to visualize the movement of materials in the discharging device of kneading machine, the gas-solid coupling method based on CFD-DEM is used to solve the problem. RNG K- 蔚 turbulence model and Euler-Lagrange coupling algorithm are used to simulate the material movement, velocity distribution and coupling force distribution at different spindle speeds. The material movement process of fan spindle at 3 000r/min was studied in different regions. The results show that in the range of 3 200r/min rated speed of the fan spindle, the quantity of materials discharged at the end of the simulation is 6191 / 2669 and 7.161 respectively at the end of the simulation, and the average velocity of the materials in different regions forms a gradient distribution. The order from big to small is material outlet region (10.00m/s), fan rotation area (6.00m/s), material inlet area (0.87m/s), fan rotation region has the largest airflow velocity (peak 50.00m/s), and has the strongest effect on material coupling force, while the material inlet area has the smallest coupling force. The material quantity is the most in the entrance area and a small amount of accumulation occurs at the end of the simulation, but no reflux occurs in the exit area. The experimental results show that it is feasible to use CFD-DEM gas-solid coupling method to visualize the movement of materials in the discharging device of the kneading machine.
【作者單位】： 甘肅農(nóng)業(yè)大學(xué)工學(xué)院;中國農(nóng)業(yè)大學(xué)工學(xué)院;
【基金】：國家“十二五”科技支撐計劃項目(2012BAD14B10)
【分類號】：S817.12
，
本文編號：2166347
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