Reaction Engines Reveals Secret Of Sabre Frost Control Technology
Reaction Engines Reveals Secret Of Sabre Frost Control Technology
Jul 8, 2015 Guy Norris | Aerospace Daily & Defense Report
GLASGOW, Scotland Details of the critical technology at the core of an innovative hybrid hypersonic propulsion system for air and space systems have been unveiled for the first time by its British-based developer, Reaction Engines.
<snip>
The system chills incoming air from more than 1,000C to minus 150C in less than 1/100th of a second before passing the pre-cooled air through a turbo-compressor and into the rocket combustion chamber, where it is burned with sub-cooled liquid hydrogen. But until now the means by which the system does this without clogging up the pre-cooler with ice has remained a closely guarded company secret.
<snip>
To do this, Reaction Engines has borrowed a trick from the chemical process industry, Varvill says. We inject the methanol at one of the coldest points and we effectively get the mix of water and methanol to flow forward in the matrix against the direction of the airflow. While conceding this could seem counterintuitive, Varvill says the system achieves this by catching the water-methane mix and re-injecting it farther upstream. We have multiple injection and extraction points in the matrix, but the overall effect is the mix of methanol and water is actually flowing forward in the matrix against the airflow direction.
<snip>
Reaction Engines decided to go public with the frost control technology because of pending patent applications. The trigger for patenting was the awareness that to execute this program we are going to have to involve other companies, says Mark Thomas, former chief engineer for technology and future programs at Rolls-Royce, who recently took the reins as managing director of Reaction Engines. You cant keep trade secrets very long in that situation, so it is better to be protected formally and legally on the clever stuff. Thomas adds that Reaction is close to having those approved.
The company is developing the Sabre engine principally for the Skylon single-stage-to-orbit spaceplane. But the propulsion system and its pre-cooler technology are attracting wider interest for potential aircraft and two-stage launch vehicle applications.
NBachers
(17,122 posts)bananas
(27,509 posts)First, probably the best place to read informed discussion on this is at http://forum.nasaspaceflight.com/index.php?topic=36826.msg1402540#msg1402540
The USAF evaulated it earlier this year:
Jan 2015: U.S. Air Force to Evaluate British Firms Spaceship Engine (Skylon SABRE SSTO spaceplane)
http://www.democraticunderground.com/101682731
Apr 2015: AFRL Gives Seal of Approval to British Air-breathing Engine Design
http://www.democraticunderground.com/1016120904
ESA evaluated it a few years ago:
Nov 2012: Skylon's Sabre engine passes key tests, endorsed by European Space Agency.
http://www.democraticunderground.com/122812864
Nov 2012: Reaction Engines Breakthrough Could Mean Four Hour Flights To Anywhere In The World
"ESA are satisfied that the tests demonstrate the technology"
http://www.democraticunderground.com/1014319873
NBachers
(17,122 posts)Skunk Works Reveals Compact Fusion Reactor Details
http://aviationweek.com/technology/skunk-works-reveals-compact-fusion-reactor-details