松散润叶筒三维传热传质过程数值模拟
Three-dimensional heat and mass transfer model and numerical simulation of moistening cylinder
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摘要: 为研究松散润叶筒内部热湿环境分布,通过构建真实比例的三维松散润叶筒模型,采用计算流体力学(CFD)方法数值模拟松散润叶筒内部的三维传热传质过程,并根据温度和含水率对喷雾喷射角和筒体倾角进行优化。结果表明:模拟值与实验值整体吻合良好,温度平均相对误差为0.6%,所建立的 CFD 模型真实有效;轴向气相温度呈阶段式变化,前半段温度迅速升高,后半段温度稳定在341.0 K左右;雾化水和水蒸气向烟叶持续传质传热,使得轴向烟叶温度、含水率逐步提高,最终出料口烟叶温度达326.3 K,含水率达17.21%;筒体倾角为3°、喷雾喷射角为45°时,烟叶加湿加热效果最佳。Abstract: In order to study the distribution of heat and moisture environment inside the moistening cylinder, a three-dimensional moistening cylinder model with real proportion was constructed. The three-dimensional heat and mass transfer process inside the moistening cylinder was numerically simulated by computational fluid dynamics (CFD) method, and the spray angle and cylinder inclination angle were optimized according to temperature and moisture content. The results showed that the simulated values were in good agreement with the experimental values, and the average relative error of temperature was 0.6%. The established CFD model was real and effective. The temperature of the gas phase in the axial direction changes in stages. The temperature in the first half increased rapidly, and the temperature in the second half was stable at about 341.0 K. The continuous mass and heat transfer of atomized water and water vapor to tobacco leaves gradually increased the temperature and moisture content of tobacco leaves in the axial direction. The temperature of tobacco leaves at the final discharge port reached 326.3 K, and the moisture content reached 17.21%. Through further research, the optimization suggestions for the process conditions of the moistening cylinder are put forward: the inclination angle of the cylinder should be selected as 3°, and the spray angle should be selected as 45°.
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Key words:
- moistening cylinder /
- tobacco /
- heat transfer /
- mass transfer /
- numerical simulation
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[1]
郭越.滚筒式热风润叶机控制方式的改进[J].河南科技,2014(1):103,124.
-
[2]
国家烟草专卖局.卷烟工艺规范[M].北京:中国轻工业出版社, 2016.
-
[3]
周学政,何蓉,李东亮,等.松散回潮工艺参数对卷烟叶丝常规化学成分的影响[J].西南大学学报(自然科学版),2011,33(7):137-140.
-
[4]
唐军,周冰,唐丽,等.松散回潮工序加工强度对烟丝致香物质的影响[J].江西农业学报,2015,27(3):66-69.
-
[5]
万云飞,王广超,王彬彬,等.松散回潮工序对卷烟感官质量的影响[J].安徽农业科学,2016,44(10):101-103.
-
[6]
河南中烟工业有限责任公司,河南中心线电子科技有限公司.一种松散回潮工序的出口含水率的控制方法及系统:201911272662.3[P].2020-01-11.
-
[7]
江西中烟工业有限责任公司.一种用于烟草片烟松散回潮机热风温度控制装置:201821579579.1[P].2019-05-14.
-
[8]
张天驿,蒋红海,忽正熙.基于红外图像边缘检测的松散回潮过程中烟草运动轨迹分析[J].新技术新工艺,2016(3):103-105.
-
[9]
刘栋,李华杰,罗登炎,等.滚筒加工设备烟丝停留时间分布的测定方法[J].烟草科技,2011,286(5):5-10.
-
[10]
周凯敏,何晋,盛科,等.滚筒烘丝机内烟丝滞留时间模型的建立及数值模拟[J].烟草科技,2016,49(5):94-99.
-
[11]
王飞,李彩亭,曾光明,等.伞罩型湿式脱硫除尘器气液固三相流数值模拟[J].化学工程,2009,37(4):31-34.
-
[12]
李俏.基于CFD的某滚筒式混料机流场研究[D].昆明:昆明理工大学,2015.
-
[13]
VERSTEEG H K,MALALASEKERA W.An introduction to computational fluid dynamic:The finite volume method[M].New York:Wiley,1995.
-
[14]
朱正权,陆金桂,尹振华,等.基于CFD的汽车空气调节系统离心风机流场与气动噪声数值模拟[J].轻工学报,2018,33(3):101-108.
-
[15]
SHIH T H,LIOU W W,SHABBIR A,et al.A New k-ε eddy viscosity model for high reynolds number turbulent flows-model development and validation[J].Computers & Fluids,1994,24(3):227-238.
-
[16]
马亚萍,刘朝贤,王乐,等.烟草形态对烟草热物性的影响[J].烟草科技,2018,51(6):90-94.
-
[17]
段兵兵,王恒旭,张学军,等.湿空气与水直接接触冷凝CFD模拟研究[J].制冷技术,2019,39(1):28-33.
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