抄録
The experimental results obtained in the previous reports lead us to a new hypothesis that the relative distribution of gas temperature and local heat transfer coefficient around the torch remain unchanged and they are almost the same as those in spot heating during line heating process. The appropriateness of this hypothesis is proved by performing an inverse heat conduction analysis of a spot heating experiment. A new method of heat input estimation for line heating process based on this hypothesis has been propounded. The validity of this method is examined by comparing the calculated and measured plate temperature during line-heating experiment.
The main results are as follows:
1) For the spot heating experiment using a high power line heating torch, the measured back face plate temperature agree well with the calculated ones which are derived from the plate heating face temperature and heat flux estimated by inverse heat conduction analysis. This result shows the accuracy of the inverse analysis, and it support the hypotheses proposed in this paper.
2) For the line-heating experiment using a high power line heating torch the calculated temperature distribution obtained by using the relative distribution of gas temperature and local heat transfer coefficient in the spot heating experiment agree well with the experimental results. This result shown that the temperature distribution in a plate during line-heating with arbitray torch travering history and plate size can be calculated as far as a spot heating experiment with the same torch and gas condition is performed.
