山东大学学报 (工学版) ›› 2023, Vol. 53 ›› Issue (3): 69-77.doi: 10.6040/j.issn.1672-3961.0.2022.144
刘祥坤1,2,李树忱1*,王修伟1,2,田野1,2,许京伟3,魏清武4,赵永曦5
LIU Xiangkun1,2, LI Shuchen1*, WANG Xiuwei1,2, TIAN Ye1,2, XU Jingwei3, WEI Qingwu4, ZHAO Yongxi5
摘要: 以铣槽机泥浆运移过程为研究对象,利用计算流体力学(computational fluid dynamics, CFD)中的欧拉两相流模型,对泥浆管中的固液两相流进行模拟,并改变泥浆入口流速、泥浆黏度及密度等基本参数,得到不同参数条件下泥浆整体运移规律。结果表明:随着开挖深度增大,泥浆管压力损失减小,最大颗粒体积分数变化不明显;随着入口流速增大,最大颗粒体积分数呈现先减小后增大趋势,入口流速约为5~7 m/s时具有最小的颗粒堆积浓度;随着泥浆黏度及密度增大,泥浆运移时颗粒堆积情况减少,但泥浆黏度超过2.5 kg/(m·s)时,对泥浆携渣能力的提升作用减弱,泥浆管路压力损失明显增大;对比分析不同地层硬度导致颗粒直径变化对泥浆运移的影响,颗粒直径增大,颗粒堆积情况显著增加。根据模拟结果,对双轮铣地连墙施工提出优化措施,为解决泥浆循环过程中输送阻力大、管道淤堵等问题提供相应指导。
中图分类号:
[1] | 詹涛,杨春勃,安斌. 在泥质粉砂岩地层中采用双轮铣快速成槽施工技术[J]. 隧道建设, 2018,38(12): 2019-2025. ZHAN Tao, YANG Chunbo, AN Bin. Rapid grooving technology of double-wheel trench cutter used in argillaceous siltstone stratum[J]. Tunnel Construction, 2018, 38(12): 2019-2025. |
[2] | 路乾,胡长明,王晓华,等. 地下连续墙成槽施工槽壁整体稳定性分析[J]. 地下空间与工程学报, 2021,17(3): 864-871. LU Qian, HU Changming, WANG Xiaohua, et al. Analysis on the overall stability of trenching construction of diaphragm wall[J]. Chinese Journal of Underground Space and Engineering, 2021, 17(3): 864-871. |
[3] | 资晓鱼,申玉生,连正,等. 超深地下连续墙槽壁位移及泥浆配制技术研究[J]. 路基工程, 2021(2): 140-147. ZI Xiaoyu, SHEN Yusheng, LIAN Zheng, et al. Study on displacement of trench wall of ultra-deep diaphragm wall and slurry configuration technology[J]. Subgrade Engineering, 2021(2): 140-147. |
[4] | 熊庭,张梦达,危卫,等. 泥浆管道输送特性的CFD模拟[J]. 人民黄河, 2018,40(4): 19-23. XIONG Ting, ZHANG Mengda, WEI Wei, et al. CFD simulation of characteristics of pipeline slurry transportation[J]. Yellow River, 2018, 40(4): 19-23. |
[5] | 李万莉,游正民. 双轮铣槽机泥浆管内部固液两相流动的仿真分析[J]. 中国工程机械学报, 2015,13(5): 400-405. LI Wanli, YOU Zhengmin. Simulation analysis on solid-liquid two-phase flow in slurry pipe for trench cutters[J]. Chinese Journal of Construction Machinery, 2015, 13(5): 400-405. |
[6] | 王继红,张腾飞,王树刚,等. 水平管道内固液两相流流动特性的CFD模拟[J]. 化工学报, 2011,62(12): 3399-3404. WANG Jihong, ZHANG Tengfei, WANG Shugang, et al. Numerical simulation of liquid-solid slurry flow in horizon pipeline[J]. CIESC Journal, 2011, 62(12): 3399-3404. |
[7] | 陈延伟,王志强,王影杰,等. 泥水系统中泥浆管内固液两相流动的数值模拟分析[J]. 机械研究与应用, 2018,31(1): 42-46. CHEN Yanwei, WANG Zhiqiang, WANG Yingjie, et al. Numerical simulation analysis of solid-liquid two-phase flow in slurry pipe[J]. Mechanical Research & Application, 2018, 31(1): 42-46. |
[8] | ZENG Dezhi, ZHANG Enbo, DING Yanyan, et al. Investigation of erosion behaviors of sulfur-particle-laden gas flow in an elbow via a CFD-DEM coupling method[J]. Powder Technology, 2018, 329: 115-128. |
[9] | 何川. CFD基础及应用[M].重庆:重庆大学出版社, 2015. |
[10] | 吴迪,蔡嗣经,杨威,等. 基于CFD的充填管道固液两相流输送模拟及试验[J]. 中国有色金属学报, 2012,22(7): 2133-2140. WU Di, CAI Sijing, YANG Wei, et al. Simulation and experiment of backfilling pipeline transportation of solid-liquid two-phase flow based on CFD[J]. The Chinese Journal of Nonferrous Metals, 2012, 22(7): 2133-2140. |
[11] | 傅旭东,王光谦. 低浓度固液两相流颗粒相本构关系的动理学分析[J]. 清华大学学报(自然科学版), 2002,62(4): 560-563. FU Xudong, WANG Guangqian. Kinetic analysis of the constitutive relationships for the particle phase in dilute solid/liquid two-phase flows[J]. Journal of Tsinghua University(Science and Technology), 2002, 62(4): 560-563. |
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