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Governing Equation and mathematical simulation.on Ablation and Transpiration Control

Journal of Systems Engineering and Electronics 1992年第3期3卷 44-58页

作者： Yang Xueshi and Gao Wei Beijing Institute of Electromechanic System Engineering, P.O. Box 3924, Beijing 100854, ChinaYuan Zhaoding Institute of Computer Application and simulation.Technology, Beijing 100854Xu YanhouDepartment of Modem Mechanics, University of Science and Technology of China, Hefei 230026 Beijing Institute of Electromechanic System Engineering P.O. Box 3924 Beijing 100854 China Institute of Computer Application and simulation.Technology Beijing 100854 Department of Modern Mechanics University of Science and Technology of China Hefei 230026

This paper represents a physical model of two -dimensional transpiration cooling control system with surface heating and ablating. The governing equation is derived and the third boundary conditions are given. They constitute a two -dimensional variable -domain distributed parameter control system in which the control parameter appears in both the governing equation and the boundary conditions. Applying time semi-step alternating direction method to difference this mathematical model, the tridiagonal difference equations are obtained. For a flying shell of electromagnetic railgun, the mathematical simulation.results agree with the realistic physical process, and the control parameter not only can control the temperature of heat shield, but also can control the boundary motion effectively.

关键词： Transpiration Variable-boundary Heat transfer mathematical simulation.

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Application Study of Induction Heating Technique in Crude Oil Gathering System

Application Study of Induction Heating Technique in Crude Oi...

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第一届国际测量仪器与测试自动化学术会议

作者： Zhang Huijuan Lv Dianli Li Lingling Wang Yanting (Hebei University of Technology Tianjin 300130 China)

＜正＞The most crude oil has high viscosity, contains a high percentage of wax, and congeals in normal atmospheric temperature easily. Thus, it is necessary to heat when it is been transferred. According to individual properties of the each distributional pipeline of oil, this essay will establish a mathematical model that fits the simulation. of finite element method. Moreover, by the computation to the process of induction heating, it will obtain the distribution of eddy current in the pipeline, and the distribution of temperature under stability. In addition, with the effect of different coefficients of electric current and coils to the reaction of heating on induction, it will provide a program on the heating apparatus of induction that can be used in practical engineering.

关键词： Induction heating finite element method (FEM) mathematical simulation.

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