A Compact Safe Cold-Start (CS2) System for Scramjets using Dilute Triethylaluminum Fuel Mixtures

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,292.00
Award Year:
2010
Program:
SBIR
Phase:
Phase I
Contract:
NNX10CC74P
Award Id:
95335
Agency Tracking Number:
095133
Solicitation Year:
n/a
Solicitation Topic Code:
A2
Solicitation Number:
n/a
Small Business Information
3 Scott Lane, Manorville, NY, 11949
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
804033277
Principal Investigator:
Scott Gallimore
Principal Investigator
(571) 248-0134
scott.gallimore@acentlabs.com
Business Contact:
Anthony Castrogiovanni
President
(631) 801-2616
anthony.castrogiovanni@acentlabs.com
Research Institute:
n/a
Abstract
This proposal addresses the cold-start requirements of scramjet engines by developing a safe, energy-dense, and low volume hydrocarbon fuel conditioning system based on the hydrolysis reaction of water with triethylaluminum (TEA). TEA is an organometallic liquid that reacts exothermically with water and burns readily in air when not diluted in hydrocarbon mixtures. We propose to use the hydrolysis of nonpyrophoric dilute TEA/JP fuel mixtures in an integrated mixing/injection apparatus to heat and vaporize liquid hydrocarbon fuel to enable cold-start capability in regeneratively cooled scramjets. In addition, the hydrolysis reaction also produces ethane gas, which serves the dual purpose of atomizing any remaining liquid by effervescence as well as producing an ethane-rich injectant that is more readily ignitable than the vaporized JP fuel. Furthermore, since TEA is pyrophoric, any remaining TEA in the mixture could serve as an ignition aid once it comes in contact with air. Hence, through a straightforward hydrolysis mechanism, the proposed system would preheat and vaporize the fuel, atomize any remaining liquid through effervescence, add readily ignitable ethane to the mixture, and provide a potential ignition source with any TEA leftover from the hydrolysis reaction. The proposed Phase 1 and 2 research will result in the Compact Safe Cold-Start (CS2) system which will be a key enabling technology for future operational hypersonic vehicles.

* information listed above is at the time of submission.

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