Hostname: page-component-7bb8b95d7b-l4ctd Total loading time: 0 Render date: 2024-09-22T14:56:39.323Z Has data issue: false hasContentIssue false
  • English
  • Français

Transpiration Cooled Porous Type Vi Silica Rocket Windows

Published online by Cambridge University Press:  28 February 2011

Albert G Fosmoe II  and
Larry L. Hench
Albert G Fosmoe II
Affiliation:
Advanced Materials Research Center, University of Florida, One Progress Blvd., #14, Alachua, Fl 32615
Larry L. Hench
Affiliation:
Advanced Materials Research Center, University of Florida, One Progress Blvd., #14, Alachua, Fl 32615
Get access

Abstract

A novel use of sol-gel derived porous Type VI silica for high performance rocket guidance system windows is evaluated. The samples produced for this study were optically transparent hydrofluoric and/or nitric acid catalyzed tetramethylorthosilicate (TMOS) xerogel monoliths with average pore radii of 1.2, 5.0, and 8.Onm. Maximum He transpiration velocities of up to 3 cm/sec, 3 times the velocity needed for transpiration cooling, are measured for a 5.0 nm sample at 3.2 MPa. Transpiration velocities of 0.6 cm/sec result in cooling effects as large as 44°C from 160°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 843
Copyright
Copyright © Materials Research Society 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Hench, L. L., Fosmoe II, A. G., presented at the 1989 MRS Fall meeting, Boston, MA, 1989.Google Scholar
2. Hench, L. L., Wang, S. H., and Nogues, J. L., in Multifunctlonal Materjals, edited by Gunshor, Robert L., (SPIE: Bellingham, Washington, 1988) Vol. 878, p 76.Google Scholar
3. Hench, L. L. and West, J. K., in Chem. Rev. 90, 33–70 (1990).Google Scholar
4. Vasconcelos, W., Ph.D. Thesis, University of Florida, 1989.Google Scholar
5. Elias, E., Masters Thesis, University of Florida, 1989.Google Scholar
6. Parsell, D. (private communication).Google Scholar
7. Kurzweg, U. (private communication).Google Scholar
8. Anderson, J. D., in Introduction To Flight, 3rd ed. (McGraw-Hill Book Company, New York, 1989) p. 125.Google Scholar
9. Carman, P. C. in Flow of gases Through Porous Media, (Academic Press INC., London, 1956) p. 7.Google Scholar
10. Fosmoe, A. G. and Hench, L. L. (to be submitted J. Materials Science.)Google Scholar
11. Tritton, D. J. in Physical Fluid Dynamics, 2nd ed. (Oxford University Press, New York, 1988) p. 67.Google Scholar
12. Scheidegger, A. E. in The Physics of Flow Through Porous Me1dia, 3rd ed. (University of Toronto Press, Toronto, 1974) pp. 38–39.Google Scholar