弯管内成品油顺序输送混油数值计算
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摘要
为了研究弯管对成品油顺序输送混油量的影响,采用volume of fluid(VOF)多相流模型,通过改变水平弯管的弯曲角度、曲率半径与竖直双弯管油品的输送顺序、方向及速度等因素,对水平弯管和竖直双弯管两种状态下成品油顺序输送进行三维数值模拟。结果表明:成品油在不同弯曲角度水平弯管中顺序输送时,随弯管弯曲角度增大,弯管处流场变化对混油段干扰加剧,混油量加大;在不同曲率半径水平弯管中输送时,随着弯管曲率半径增大,混油"双前锋"效应减弱,顺序输送过程中的混油段也相应缩短;成品油在竖直双弯管中顺序输送时,对于油品上行,汽油前行比柴油前行产生的混油量少,对于油品下行,相同输送顺序下结果则正好相反;当油品上行、汽油前行时,增大油品输送速度,紊流径向脉动加剧,油品间轴向扩散减小,混油段明显变短。
In order to study the influence of an elbow pipe on the amount of refined oil mixed in sequential delivery, the volume of fluid(VOF) multi-phase flow model was adopted. By changing the bending angle of the horizontal elbow pipe, the radius of curvature and the delivery sequence of the vertical double elbow pipe, direction and speed, three-dimensional numerical simulations of the orderly delivery of refined oil under both horizontal and vertical double bends have been carried out. The results show that when the product oil is transported sequentially in different horizontal bending pipes with different bending angles, as the bending angle of the pipe increases, the variation of flow field at the bend increases the interference in the mixed oil section and the rate of mixing of the oil increases. When conveyed in horizontal bends with different radii of curvature, as the curvature radius of the elbow increases, the "double forward" effect of the mixed oil decreases and the mixed oil segment in the process of sequential delivery decreases accordingly. When the product oil is conveyed sequentially in a vertical double-bend pipe, for the oil to go up, the amount of the mixed oil produced by the gas oil forward is smaller than that from the diesel oil forward; for the oil to go down, the result is exactly opposite for the same sequence of delivery. When the oil goes up and the gas oil goes ahead, as the oil delivery speed increases, the radial pulsation of the turbulent flow is increased, the axial diffusion between the oil products decreases and the mixed oil section becomes significantly shorter.
In order to study the influence of an elbow pipe on the amount of refined oil mixed in sequential delivery, the volume of fluid(VOF) multi-phase flow model was adopted. By changing the bending angle of the horizontal elbow pipe, the radius of curvature and the delivery sequence of the vertical double elbow pipe, direction and speed, three-dimensional numerical simulations of the orderly delivery of refined oil under both horizontal and vertical double bends have been carried out. The results show that when the product oil is transported sequentially in different horizontal bending pipes with different bending angles, as the bending angle of the pipe increases, the variation of flow field at the bend increases the interference in the mixed oil section and the rate of mixing of the oil increases. When conveyed in horizontal bends with different radii of curvature, as the curvature radius of the elbow increases, the "double forward" effect of the mixed oil decreases and the mixed oil segment in the process of sequential delivery decreases accordingly. When the product oil is conveyed sequentially in a vertical double-bend pipe, for the oil to go up, the amount of the mixed oil produced by the gas oil forward is smaller than that from the diesel oil forward; for the oil to go down, the result is exactly opposite for the same sequence of delivery. When the oil goes up and the gas oil goes ahead, as the oil delivery speed increases, the radial pulsation of the turbulent flow is increased, the axial diffusion between the oil products decreases and the mixed oil section becomes significantly shorter.
引文
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[14] 赵会军, 张青松, 张国忠, 等. 基于PHOENICS顺序输送管道内两种油品传质数值研究[J]. 北京化工大学学报(自然科学版), 2006, 33(6): 22- 25. ZHAO H J, ZHANG Q S, ZHANG G Z, et al. PHOENICS-based numerical study of mass transfer with two petroleum products in a batch pipeline[J]. Journal of Beijing University of Chemical Technology(Natural Science), 2006, 33(6): 22- 25. (in Chinese)
[15] 吴子牛. 计算流体力学[M]. 北京: 科学出版社, 2001: 70- 76. WU Z N. Computational fluid dynamics[M]. Beijing: Science Press, 2001: 70- 76. (in Chinese)
[16] 陶文铨. 数值传热学[M]. 西安: 西安交通大学出版社, 2001: 332- 340. TAO W Q. Numerical heat transfer[M]. Xi'an: Xi'an Jiaotong University Press, 2001: 332- 340. (in Chinese)
[2] 吴先策. 顺序输送管道混油的分析与计算[J]. 管道技术与设备, 1996(5): 11- 13. WU X C. Analysis and calculation of mixed oil in batch transportation pipeline[J]. Pipeline Technique and Equipment, 1996(5): 11- 13. (in Chinese)
[3] 戴福俊, 胡煊, 纪荣亮, 等. 西南成品油管道混油量的计算[J]. 油气储运, 2009, 28(2): 40- 42. DAI F J, HU X, JI R L, et al. Calculation and analysis on contaminated volume of southwestern products oil pipeline[J]. Oil & Gas Storage and Transportation, 2009, 28(2): 40- 42. (in Chinese)
[4] 康正凌, 宫敬. 管道顺序输送的混油研究[J]. 油气储运, 2002, 21(5): 8- 11. KANG Z L, GONG J. Study on the contamination of batching transportation of products[J]. Oil & Gas Storage and Transportation, 2002, 21(5): 8- 11. (in Chinese)
[5] 王昆, 陈保东, 郭淑娟, 等. 管道顺序输送产生混油的问题研究[J]. 油气储运, 2007, 26(8): 8- 12. WANG K, CHEN B D, GUO S J, et al. Study on the product oil contamination caused by batching transportation[J]. Oil & Gas Storage and Transportation, 2007, 26(8): 8- 12. (in Chinese)
[6] 蒲家宁. 管道顺序输送混油分析中的若干问题[J]. 油气储运, 2000, 19(12): 18- 21. PU J N. Some problems on the mixture analysis of batch transportation of pipeline[J]. Oil & Gas Storage and Transportation, 2000, 19(12): 18- 21. (in Chinese)
[7] 吴玉国, 陈保东, 李小玲, 等. 冷热原油顺序输送弯管内混油特性数值模拟[J]. 中国石油大学学报(自然科学版), 2010, 34(3): 125- 129. WU Y G, CHEN B D, LI X L, et al. Numerical simulation on contaminated oil characteristics in bend pipe of batch pipelining of cold and hot crude oils[J]. Journal of China University of Petroleum(Natural Science Edition), 2010, 34(3): 125- 129. (in Chinese)
[8] 杜明俊, 马贵阳, 许丹, 等. 冷热原油顺序输送过程混油浓度的数值模拟[J]. 油气储运, 2010, 29(10): 730- 733. DU M J, MA G Y, XU D, et al. Numerical simulation on contamination concentration of cold-hot crude oil during batch transportation[J]. Oil & Gas Storage and Transportation, 2010, 29(10): 730- 733. (in Chinese)
[9] 乔伟彪, 马贵阳, 杜明俊, 等. U型管内成品油顺序输送混油数值计算[J]. 油气储运, 2011, 30(10): 755- 757. QIAO W B, MA G Y, DU M J, et al. Numerical calculation of contaminated product in U-shape pipeline[J]. Oil & Gas Storage and Transportation, 2011, 30(10): 755- 757. (in Chinese)
[10] 赵海燕. 不同工况下顺序输送混油的CFD模拟[J]. 化学工业与工程技术, 2012, 33(1): 54- 57. ZHAO H Y. CFD simulation of contamination on batch transportation pipeline under different conditions[J]. Journal of Chemical Industry & Engineering, 2012, 33(1): 54- 57. (in Chinese)
[11] 徐金萌, 吴明, 胡志勇, 等. Z型管成品油顺序输送混油量数值计算[J]. 辽宁石油化工大学学报, 2013, 33(1): 35- 38. XU J M, WU M, HU Z Y, et al. Numerical calculation of contaminated product in Z-shape pipeline[J]. Journal of Liaoning Shihua University, 2013, 33(1): 35- 38. (in Chinese)
[12] 方利民, 梁永图, 何国玺. 顺序输送环道中弯管结构对混油量的影响分析[J]. 辽宁石油化工大学学报, 2016, 36(3): 24- 29. FANG L M, LIANG Y T, HE G X. Analysis on the influence of different pipe bending structures on mixture volume in the sequence transportation experimental loop[J]. Journal of Liaoning Shihua University, 2016, 36 (3): 24- 29. (in Chinese)
[13] 陈庆勋. 成品油顺序输送分输和变管径混油量的计算[J]. 油气储运, 1999, 18(1): 7- 8. CHEN Q X. Calculation on the mixing oil volume of sequence transportation of oil product in the batch and variable diameter pipes[J]. Oil & Gas Storage and Transportation, 1999, 18(1): 7- 8. (in Chinese)
[14] 赵会军, 张青松, 张国忠, 等. 基于PHOENICS顺序输送管道内两种油品传质数值研究[J]. 北京化工大学学报(自然科学版), 2006, 33(6): 22- 25. ZHAO H J, ZHANG Q S, ZHANG G Z, et al. PHOENICS-based numerical study of mass transfer with two petroleum products in a batch pipeline[J]. Journal of Beijing University of Chemical Technology(Natural Science), 2006, 33(6): 22- 25. (in Chinese)
[15] 吴子牛. 计算流体力学[M]. 北京: 科学出版社, 2001: 70- 76. WU Z N. Computational fluid dynamics[M]. Beijing: Science Press, 2001: 70- 76. (in Chinese)
[16] 陶文铨. 数值传热学[M]. 西安: 西安交通大学出版社, 2001: 332- 340. TAO W Q. Numerical heat transfer[M]. Xi'an: Xi'an Jiaotong University Press, 2001: 332- 340. (in Chinese)