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

Award Information
Agency:
National Aeronautics and Space Administration
Amount:
$99,292.00
Program:
SBIR
Contract:
NNX10CC74P
Solitcitation Year:
2009
Solicitation Number:
N/A
Branch:
N/A
Award Year:
2010
Phase:
Phase I
Agency Tracking Number:
095133
Solicitation Topic Code:
A2.02
Small Business Information
ACENT Laboratories, LLC
3 Scott Lane, Manorville, NY, 11949-2623
Hubzone Owned:
N
Woman Owned:
N
Socially and Economically Disadvantaged:
N
Duns:
804033277
Principal Investigator
 Scott Gallimore
 Principal Investigator
 (571) 248-0134
 scott.gallimore@acentlabs.com
Business Contact
 Anthony Castrogiovanni
Title: President
Phone: (631) 801-2616
Email: anthony.castrogiovanni@acentlabs.com
Research Institution
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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