Application of the Inverse Method to Estimate the Heat Transfer Coefficient of the Moving Heated Plate with Experimental Data
| Autor: | Chun-Hsu Chang, 張君旭 |
|---|---|
| Rok vydání: | 2003 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 91 The present study is analyzing the temperate distribution of the heated plate moving to lower temperate environment and estimating the heat flux and heat transfer coefficient distribution. And hopping offer a method to analyze the heat transfer problems and to discuss the processes such as hot rolling, extrusion, wire drawing, continuous casting, fiber drawing and crystal growing, hopping the material temperate distribution can be uniform. The present study introduces a hybrid numerical method to analyze the inverse heat conduction problem concerning the prediction of the surface behavior. This algorithm combines the Laplace transform technique and the finite-difference method in conjunction with the least-squares scheme and sequential-in-time concept. Time-dependent terms in the governing equation are removed by using the Laplace transform technique, and then the resulting differential equation is solved by using the finite-difference method. Due to the application of the Laplace transform technique, the temperature can be calculated at a specific time without step-by-step computation in the time domain. By the least-squares scheme, the convergence of iteration can become fast and stable. In this thesis, various examples are illustrated to show the applicability and efficiency of the present numerical method. The effect of time-step, numerical error and thermocouple location is investigated. It can be seem from various illustrated examples that the present numerical method can accurately and efficiently estimate the estimates, even though the thermocouple is located far from the estimated surface. Results also show that the estimations are not very sensitive to the measurement error. Thus, it can be concluded that the present numerical method can successfully be applied to analyze the moving boundary heat conduction problems. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|