Heat, Gas, Solid Two-phase Coupling Tube Drying System And Numerical Simulation,

This subject studies some content about fluid field, distribution of temperature and optimization of structure . The content is studied about high temperature expansion canal under the coupling function of complication operating mode about heat, fluid and structure.The solution of this subject comes down to the analysis issue of computer aid engineer about the coupling of heat, fluid (gas-solid two-phase) and structure in principle. And this subject concerns many disciplines . It builds up mathematical model including all sorts of factors ; ensures the homologous borderline and initial condition ; pulsates and tests homologous physical property coefficient; selects suitable unit type about fluid and structure according to computation precision , requisition of design and the variation of physical property coefficient according as temperature; divides grids and proceeds number value calculation adopting finite element analysis software. All the above-mentioned content is the key of this paper.This text ensures the dominant influence factor according to the work physical environment of the research object and considering the theory of gas-solid two-phase, the theory of hydrodynamic and the theory of guts transportation . It also builds up the mathematical model and the control equation . To the mathematical model of the research object, the paper analyses and calculates by finite element of FLOTRAN CFD of ANSYS software .It obtains the distribution of temperature , velocity, stress and gas-solid two-phase of the whole three dimension model. By the powerful after-treatment of ANSYS software , this text analyses the result of the numerical calculation from every aspect and compares with the actual measured value about some parameters of the high temperature expansion canal of 2400kg/h. On the other hand , It establishes the mathematical mode of high temperature expansion canal of 6400kg/h on the basis of design parameter of enterprise. Then the text obtains the physical propertycoefficient of high temperature gas and the mixture gas of tobacco refuse by examination calculating over and over . It calculates by finite element and verifies the reasonableness of the model . On the basis of above-mentioned analysis, it also brings up the geometry models for some high temperature expansion canals with different structural form. For the geometry models above-mentioned , this text analyses and compares the results too. It concludes a better ideal structural form finally.By the detailed analysis and comparation , this subject simulates the number value about the high temperature expansion canal, which reflects concretely the whole disposal process of tobacco refuse within the high temperature expansion canal. It offers the reliable emulation tool and good way of thinking for the design of the product , at the same time , it offers the theory reliance for the further exploitation design. The optimization of structural form establishes certain foundation for the independent knowledge property right of the series products, lays foundation for the practical application and promotion at the aspect of engineering of the technology of computer aid engineer. The fruit of the theory research has certain academic value about the theory of variant physical property of gas-solid two-phase and calculation of number value .