Accession Number:

ADA413742

Title:

Solar-Powered Rocket Engine Optimized for High Specific Impulse

Descriptive Note:

Technical paper

Corporate Author:

HERCULES AEROSPACE CO MAGNA UT

Personal Author(s):

Report Date:

1994-01-01

Pagination or Media Count:

7.0

Abstract:

Hercules Aerospace is currently developing a solar-powered rocket engine SPRE design optimized for high specific impulse lsp. The SPRE features low loss geometry in its light-gathering cavity, which includes an integral secondary concentrator. The simple one-piece heat exchanger is made from refractory metal andor ceramic open-celled foam The foams high surface-area-to- volume ratio will efficiently transfer thermal energy to the hydrogen propellant The single-pass flow of propellant through the heat exchanger further boosts thermal efficiency by regeneratively cooling surfaces near the entrance of the optical cavity. These surfaces would otherwise reradiate a significant portion of the captured solar energy back out the cavity entrance. Such design elements promote a high overall thermal efficiency and hence a high operating lsp.

Subject Categories:

  • Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE