Analysis of the Effect of Slurry Rheological Model on the Pressure Loss Characteristics of Slurry Discharge Pipe of Slurry Shield
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 us-ing 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 rheolog-ical 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 mod-el have the second-smallest error,which is about 8%,and the calculation results of Power law model have the great-est 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 con-sideration of the calculation accuracy and the time cost of calculation,the Bingham model is recommended for the slurry rheological model.
Slurry shield circulation systemPressure lossNon-Newtonian fluidCFD-DEM couplingModel test
NETL
NSTL
万方数据
