Tube Similar To The Principle Of Dry Gas-solid Flow And Coupled Numerical Simulation,

By using gas-solid particles two-phase flow theory and computational fluid dynamics method, dynamic behaviors of gas-solid particles two-phase flow about high temperature expansion canal are investigated and studied.A firm has produced successfully the high temperature expansion canal of 2400kg/h used in tobacco factory, it want to develop the high temperature expansion canal of 6400kg/h. The predecessor has simulated the high temperature expansion canal of 2400kg/h, but the form of the high temperature expansion canal of 6400kg/h isn't magnifying according to the traditional method, so it need similitude theory to design its form.The turbulent flow of high temperature expansion canal is very complex process, so it needs numerical simulation. This paper ensures the dominant influence factor according to the work physical environment of the research object and considering the theory of gas-solid two-phase and the theory of computational fluid dynamic method. It also builds up the mathematical model and the control equation. It establishes the mathematical mode of high temperature expansion canal of 6400kg/h on the basis of design parameter of the high temperature expansion canal of 2400kg/h by similitude theory. Then the text obtains the physical property coefficient of high temperature gas and the mixture gas of tobacco refuses by examination calculating over and over. The paper analyses and calculates by finite element of FLOTRAN 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 and the result of the numerical calculation of the high temperature expansion canal of 2400kg/h. It verifies the reasonableness of the model. On the basis of above-mentioned analysis, it also brings up the geometry models for somehigh temperature expansion canals with different structural form. For the geometry models above-mentioned, this text analyses and compares the results too. Finally it concludes a better ideal structural form.The results show that numerical simulation about the high temperature expansion canal reflects concretely the whole disposal process of tobacco refuses within the high temperature expansion canal. The theory investigation method and numerical simulation that used in this paper are correct and reliable.It is a very economical and efficient method to calculate and analyze the fluid field and distribution of temperature for the issue of engineering. The results of the paper offer the theory reliance for the design and the further exploitation design of the product and a method for the investigation of gas-solid two-phase flows, at the same time it offers established foundation for the application and extend of the technology of numerical simulation in the field of engineering technology.