Abstract In order to ascertain the effect of slurry rheological model on the results of pipe pressure loss calculation of slurry shield, the three-dimensional transient slurry-muck multiphase flow coupling model has been created by using the CFD-DEM coupling method, the pressure loss characteristics of slurry discharge pipe of slurry shield are identified, the rheological parameters of the rheological model in the coupling model are determined through rheological test, and the shape and size of muck are determined through 3D scanning. In addition, through comparison with the model test results, the applicability of the rheological model and the accuracy of the calculation results have been analyzed. As the study results indicate: in solving the pipe pressure loss of slurry-particle two-phase flow, the calculation results of H-B model have the smallest error, which is about 6%, the calculation results of Bingham model have the second-smallest error, which is about 8%, and the calculation results of Power law model have the greatest numerical error, which is about 18%. Therefore, for the numerical calculation that has the highest requirement for calculation accuracy, the H-B model is recommended for the slurry rheological model. With comprehensive consideration of the calculation accuracy and the time cost of calculation, the Bingham model is recommended for the slurry rheological model.
Abstract：
In order to ascertain the effect of slurry rheological model on the results of pipe pressure loss calculation of slurry shield, the three-dimensional transient slurry-muck multiphase flow coupling model has been created by using the CFD-DEM coupling method, the pressure loss characteristics of slurry discharge pipe of slurry shield are identified, the rheological parameters of the rheological model in the coupling model are determined through rheological test, and the shape and size of muck are determined through 3D scanning. In addition, through comparison with the model test results, the applicability of the rheological model and the accuracy of the calculation results have been analyzed. As the study results indicate: in solving the pipe pressure loss of slurry-particle two-phase flow, the calculation results of H-B model have the smallest error, which is about 6%, the calculation results of Bingham model have the second-smallest error, which is about 8%, and the calculation results of Power law model have the greatest numerical error, which is about 18%. Therefore, for the numerical calculation that has the highest requirement for calculation accuracy, the H-B model is recommended for the slurry rheological model. With comprehensive consideration of the calculation accuracy and the time cost of calculation, the Bingham model is recommended for the slurry rheological model.
LIU Hongzhi1 XU Shankun1 GUO Yidong2,
3 FANG Yingran2,
3 LI Xinggao2 etc
.Analysis of the Effect of Slurry Rheological Model on the Pressure Loss Characteristics of Slurry Discharge Pipe of Slurry Shield[J] MODERN TUNNELLING TECHNOLOGY, 2024,V61(1): 182-189
2024, Vol. 61 