Transient Jet-Interaction Combustion Modeling

Award Information
Agency: Department of Defense
Branch: Army
Contract: DAAH01-01-C-R111
Agency Tracking Number: A002-0572
Amount: $120,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2001
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
174 North Main Street, Dublin, PA, 18917
DUNS: 929950012
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Sanford Dash
 (215) 249-9780
Business Contact
 Sanford Dash
Title: President
Phone: (215) 249-9780
Research Institution
Interceptor missiles achieve high maneuverability in final phases of their mission via the use of divert/attitude control jets. Jet firings are of relatively short duration (10-40ms) and the aerodynamic interaction process is highly transient,characterized by large regions of jet-induced separation. The interactive process is strongly dependent on afterburning of jet exhaust constituents and on particulate interactions for heavily metalized DACS motors. Concerns of combustion productsreaching seeker windows and related particle obscuration/radiative heating issues also need to be addressed. Present abilities to support missile design are limited by computer resources with high-fidelity simulations for a fraction of the transient eventrequiring use of 64 or more processors and taking months to complete. This proposal addresses present limitations by advances in numerics and parallel code architecture, as well as in inclusion of pertinent physics and thermochemistry. Key elements ofwork proposed address: new zonal, multi-time step parallel architecture strategies to make the solution process more efficient, and, inclusion of advanced dynamic turbulent transitional models and pdf-based turbulent combustion models which have afirst-order effect on jet interactions at higher altitudes (h>30km). An optional task to examine use of unstructured numerics with specialized dynamic grid adaption is also proposed.The research proposed is of obvious benefit to the interceptor missilecommunity and we have supported both DoD and prime contractors (Lockheed, Raytheon, .) for many years in design-related issues pertinent to divert/attitude control jet interactions. This effort will clearly enhance our commercial relationships with bothDoD and prime contractors. In addition, transient jet interactions are of interest to the automotive and spray coating communities and we have been working with industry (Ford Motor Co., Sulzer Metco, .) in supporting advanced design work. Lastly,pulsatile spray injection is being investigated to enhance mixing in next generation airbreathing missile systems and this work has great relevance to the design of next generation combustors.

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

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government