Heat Transfer Analysis for Unsteady High Velocity Pipe Flow. Part I. On Minimization of Temperature Distortion in the Thermocouple Cavity. Part II. Improved Accuracy in the Prediction of Surface Heat Flux and Temperature by Intrinsic Thermocouple. Part III. Prediction of Transient Surface Heat Flux and Temperature on a Hollow Cylinder,

摘要

The work done for the project is reported here in three parts. The first is the analysis for minimization of the temperature distortion due to the thermocouple cavity. The error is minimized or reduced to zero by optimizing a combination of cavity diameter and depth and the thermocouple material and size. The second is the refinement of the presently available computer programs for prediction of the surface temperature and heat flux at the inner surface of the pipe by inverting the temperature measured by an interior probe close to the heated surface. The refinement is achieved by using the double precision format in the program and adapting the dimensionless formulation. The third is to study the inversion solution for a large time duration of a time dependent surface heat flux. The solution is obtained by the method of Laplace transform and the convolution integral. Each of the above three subjects is reported as a part of the present report.