A Simple FE-Inverse Heat Conduction Algorithm and its Application to the Determination of Surface Heat Flux During Water Jet Cooling

摘要

A finite element based inverse heat transfer analysis algorithm is developed and implemented into a 2D FF, heat transfer analysis program to study water-cooling of hot steel plates by jet impingement on runout tables. In this method, the least-squares technique with sequential function specification and regularization is presented and iterative technique is adopted to reduce the CPU time while maintaining accuracy. Parametric studies have been first performed with abrupt heat flux inputs (triangular and impulse-like heat fluxes) simulating those that occur in runout table applications. Results show that the fluctuation of inversely calculated heat flux due to random measurement errors may be damped by increasing the number of future steps and regularization parameter. The developed code is used to determine the heat flux during water jet cooling. Analysis data and comparisons with other resources are provided. The method and procedure presented are proved to be robust and reliable and have acceptable level of accuracy.