The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Comparison Of Relative Costs Of Thermal Analysis Methods For Hypersonic Vehicle Compartments

Report Number: WADD TR 60-768
Author: Malcolm, John R.
Author: Slack, Robert L.
Corporate Author: Boeing Airplane Company
Laboratory: Aeronautical Accessories Laboratory
Date of Publication: 1961-07
Pages: 201
Contract: AF 33(616)-6339
Project: 6146
Task: 60753
AD Number: AD0267059


In order to design the cooling systems of re-entry vehicles, judgment must b exercised in selecting the appropriate method for determining the transient heat transfer through complex structure into manned and equipment compartments. The accuracy must be consistent with the available calendar time, manpower and dollar cost in making this judgment. The heat flow can be determined analytically by several computing methods and experimentally by several laboratory testing methods.

This report presents the results of a study to examine the relationships between accuracy and cost in manhours, calendar time and dollars, in determining this transient heat flow for two hypothetical re-entry vehicles.

Accuracy and cost information were obtained for analytical methods: hand calculations, digital computers, differential analyzers, and passive element analogues; and for experimental methods: various size panels, half and full size vehicles, and vehicle compartments. Results are presented as curves of accuracy as a function of cost.

For the problems of this study, a general heat transfer digital computer program provides the most accuracy for the least cost. The other computing techniques rank in the following order: differential analyzer, passive element analogue, and hand calculations. The differential analyzer is the best method for parameter studies where a large number of runs is expected.

Experimental methods cannot compete with analytical methods in dollar cost, calendar time, or manhours. However, by obtaining material thermal properties experimentally, confidence can be increased in analytical solutions.

Lockheed Martin Missiles & Fire Control
Download this report

(PDF, 7.55 MB, 201 pages)

Other options for obtaining this report

Via the Defense Technical Information Center (DTIC):
A record for this report, and possibly a full-image download of the report, exists at DTIC

Via National Technical Information Service:
This report may have been digitized and made freely available for public download, or made publicly available for purchase by the National Technical Information Service through their online database, the National Technical Reports Library

Indications of Public Availability
No digital image of an index entry indicating public availability is currently available
The inside cover of this report indicates that it was released for public sale