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Using the Conditional Moment Closure Method to Assess the Effects of Turbulence Chemical Kinetics

Award Information
Agency: Department of Defense
Branch: Army
Contract: W31P4Q-20-C-0048
Agency Tracking Number: A2-8359
Amount: $1,099,998.00
Phase: Phase II
Program: STTR
Solicitation Topic Code: A16A-T001
Solicitation Number: 16.A
Solicitation Year: 2016
Award Year: 2020
Award Start Date (Proposal Award Date): 2020-09-24
Award End Date (Contract End Date): 2022-09-27
Small Business Information
17301 W. Colfax Avenue #160
Golden, CO 80401-1111
United States
DUNS: 196231166
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Brad Hitch
 (720) 232-3597
Business Contact
 Todd Leeson
Phone: (303) 881-7992
Research Institution
 Embry-Riddle Aeronautical University
 Scott Martin
1 Aerospace Blvd.
Daytona Beach, FL 32114-3910
United States

 (321) 947-4422
 Nonprofit College or University

Predicting the emission signature and radar cross-section of rocket exhaust plumes is of vital interest to the Missile Defense Agency and U.S. Army to protect the U.S. homeland and our forces abroad.  The current STTR Phase II project has shown that a single-conditioned Premixed Conditional Moment Closure (PCMC) can employ detailed chemical kinetic mechanisms while efficiently modeling combustion heat release and turbulence-chemistry interactions.  Similarly, other researchers have shown that double-conditioning can provide good predictions for ignition and extinction in non-premixed flames.  In this sequential STTR Phase II we propose to develop a more general double-conditioned CMC turbulent combustion model that will more accurately predict ignition, extinction, heat release rates and the turbulence-chemistry interaction across all premixed, non-premixed and partially premixed systems and apply it to the plume afterburning shutdown phenomena.  This effort will also include the construction and verification of a detailed combustion mechanism that is specifically suited to low pressure and high temperature plume afterburning conditions for small molecule hydrocarbon and amine fuel fragments with oxidizers like N2O4 and chlorine trifluoride.  These two developments will enable the efficient and accurate prediction of plume afterburning and afterburning shutdown along their ascent trajectories of emerging threats with new propellant chemistries.  Success in this effort is also expected to be commercially valuable in the accurate prediction of performance and pollutant formation characteristics of gas turbines, diesel engines, and Homogeneous Charge Compression Ignition (HCCI) engines.

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

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