Date of Award

Spring 1975

Document Type

Thesis

Department

Mechanical & Aerospace Engineering

Program/Concentration

Mechanical Engineering

Committee Director

Robert L. Ash

Committee Member

Robert A. Jones

Committee Member

A. Sidney Roberts

Call Number for Print

Special Collections; LD4331.E56D78

Abstract

Wind tunnel model materials typically have thermophysical properties that vary with both position and temperature. A numerical study using a finite difference representation of the heat conduction equation has been performed on several of these model materials to determine their thermal response under a specified heat loading. This study has confirmed the feasibility of using an effective thermophysical property to account for the existence of variable thermal properties when a model undergoes aero­ dynamic heating. The effective property, when used in the reduction of phase-change heat transfer data, forced agreement of the actual transient behavior of a model with the constant property semi-infinite slab approximation traditionally used to describe model response. Results of the numerical study have also been compared with similar data from an experimental apparatus currently being developed at NASA Langley Research Center. Knowledge gained from the comparison has been used to formulate methods for improving the performance of the experimental apparatus.

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DOI

10.25777/h9hb-5w65

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