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Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 41076
Amount: $100,000.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: N/A
Solicitation Number: N/A
Solicitation Year: N/A
Award Year: 1998
Award Start Date (Proposal Award Date): N/A
Award End Date (Contract End Date): N/A
Small Business Information
12345 W. 52ND AVE
Wheat Ridge, CO 80033
United States
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Dr. David T. Wickham
 (303) 940-2350
Business Contact
Phone: () -
Research Institution

Aircraft designed for hypersonic flight use fuel to cool the ramjet/scramjet propulsion system. Sensible heating and endothermic reactions are used to provide cooling and may produce fuel temperatures that exceed 1200 degrees F. At these temperatures carbonaceous deposits (coke) form. These deposits can inhibit fuel flow, reduce heat transfer, and create hot spots. Coke deposits are known to form by three different mechanisms: 1) An oxidative mechanism involving dissolved oxygen, 2) a reaction between the fuel and metals in the flow path walls that produces carbon filaments, and 3) A gas phase mechanism in which high molecular weight hydrocarbons are formed from the products of thermal cracking reactions (condensation mechanism). Although methods are currently available for controlling the first two coke formation pathways, a means to control the third mechanism is needed.Thus, the objective of the proposed work is to identiy compounds that can be added to the fuel to inhibit the coke formed by the condensation mechanism. In Phase I, TDA will add candidate suppressants to fuel and measure their effect on coke deposition rates.

* Information listed above is at the time of submission. *

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