Numerical Analysis Of Impeller CBY In Stirred Tank

In this thesis, the impeller CBY in stirred tank is analyzed withnumerical method, three aspects are included: establishment of parametricsolid model of the impeller, numerical simulation of the flow field in stirredtank and stress calculation of the impeller etc. The major work andconclusions are as follows: Program is given to compute the impeller CBY feature dimension, andthe impeller parametric solid model is established. The flow field in stirred tank with impeller CBY is simulated, and thecalculated power number is consistent with the experimental data. Theanalysis indicates that the force and moment induced by impeller surfacepressure gradient contribute to the impeller stress condition largely, and thepressure data on the impeller surface is exported. Two methods are adapted to convert the pressure on the impellersurface into load condition in the impeller stress calculation model, thestress of the impeller is calculated, the equivalent stress distribution law onthe impeller CBY surface is as follows: 1) In the chord direction of the impeller convex surface, equivalentstress is low in the side field of the impeller, but high in the middle field. III北京化工大学硕士研究生学位论文 2) In the chord direction of the impeller concave surface, according tothe different constraints of the impeller root, equivalent stress distributioncan be divided into two types. 3) In the diameter direction of the impeller convex and concavesurface, equivalent stress is on the decline, and the maximum equivalentstress position is the joint of the impeller and hub. The method of analysis and the conclusions in this work can provideimportant reference for the further experimental stress measurement.However, the data derived also need more experimental verification.