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A study of porous metal cooling


Hoffman, Charles C. (1947) A study of porous metal cooling. Engineer's thesis, California Institute of Technology.


This investigation was conducted to study the flow rate necessary to maintain a sweat cooled metal at an equilibrium temperature when subjected to a high gas temperature. The study was limited to fundamental tests on copper, bronze, and stainless steel porous metal specimens which were the only types available at this time. Water cooling was used throughout the investigation.

Conclusions of a qualitative nature were obtained which show that water flow rate is a primary factor in maintaining sweat cooled metals at equilibrium temperature, and that metal thermal conductivity has but slight effect. The feasibility of the sweat cooling technique was proven by the fact that a water flow rate of less than 0.1 cc/in.^2-sec was required to satisfactorily cool a porous metal surface subjected to a potential heat transfer of 1.0 BTU/in.^2-sec.

Item Type:Thesis (Engineer's thesis)
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Duwez, Pol E.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 June 1946
Record Number:CaltechETD:etd-10202008-150040
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4195
Deposited By: Imported from ETD-db
Deposited On:21 Oct 2008
Last Modified:26 Dec 2012 03:06

Thesis Files

PDF (Hoffman_cc_1946.pdf) - Final Version
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