Bradley D. Hitch

EDUCATION             M.S. Mechanical Engineering.  Purdue University, 1988.
                                B.S. Mechanical Engineering.  University of Nebraska, 1985.

 

SUMMARY OF QUALIFICATIONS

Brad Hitch has an extensive background in combustion kinetics, heat transfer, real-gas thermodynamics, chemically reacting and supercritical fluid flows, and mechanical design.  He developed Reaction Systems’ approach to produce reduced mechanisms and has carried out extensive testing to verify accuracy and quantify speed up factors.  At GE Aircraft Engines Mr. Hitch supported GE’s Lean Premixed Prevaporized Low NOx combustor development work using detailed kinetic modeling of propane ignition and thermal mangement for a Mach 5.5 vehicle under the NASA HiMaTE program.

 

MAJOR CONTRIBUTIONS       

April 2005 to Present: Chief Engineer, Reaction Systems, Inc., Golden, CO

    • Under a project funded by the U.S. Air Force, Mr. Hitch developed Reaction Systems’ approach to producing suites of reduced kinetic mechanisms for incorporation into CFD models of advanced scramjet engines.

 

October 1993 to March 2005: Senior Engineer, TDA Research, Inc., Wheat Ridge, CO

    • Led a commercial project to screen high temperature capability heterogeneous hexaaluminate catalysts for H2O2 decomposition activity.
    • Led an Air Force project to demonstrate an ammonia spray cooling in a pulsed thermal loop (PTL).
    • Led a NASA funded project to develop a pulsed thermal loop for electronics cooling applications.
    • Led an Air Force project to investigate the use of combustion-promoting fuel additives to solve B-52 cold-start problems with JP-8 fuel.
    • Principal investigator on an Air Force project to develop homogeneous hypergolicity catalysts for anhydrous hydrogen peroxide/high energy hydrocarbon bipropellant rocket fuels.
    • Led an Air Force projects to investigate the use of combustion-promoting fuel additives for scramjet engine applications.
    • PI on a NASA project investigating the use of combustion-promoting fuel additives for pulse detonation engine applications.
      Primary contributor on an AF SBIR Phase II that investigated high heat flux heat transfer to supercritical fuels and fuel-air heat exchanger design for hypersonic aircraft.

 

September 1987 - October 1993:   Engineer, GE Aircraft Engines, Cincinnati, Ohio.

    • Performed analyses of various complex phenomena related to subsonic and hypersonic air-breathing engines
    • Conducted combustion component testing as a member of a Flight Safety Task Force.
    • Developed detailed chemical kinetic mechanisms to model autoignition of hydrocarbon fuels and low NOx combustion system performance.
    • Designed thermal management systems, including supercritical endothermic fuel catalytic heat exchanger/reactors and advanced augmentor and exhaust nozzle cooling schemes for hypersonic aircraft.
    • Carried out CFD analysis of advanced augmentors and exhaust nozzles.

 

Professional Affiliations

Registered Professional Mechanical Engineer, Ohio.
Member: The Combustion Institute
Senior Member: American Institute of Aeronautics and Astronautics

 

Publications

Hitch, B.D. (2009).  Reduced, Accurate Combustion Mechanisms for Reacting Flow CFD, Paper No. AIAA 2009-5496 presented at the 45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2 – 5 August, Denver, CO.

 

Hitch, B.D. and Lynch, E.D. (2009).Use of Reduced, Accurate Ethylene Combustion Mechanisms for a Hydrocarbon-Fueled Ramjet Simulation, Paper No. AIAA 2009-5384 presented at the 45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2 – 5 August, Denver, CO.

 

Hitch, B.D., Wang, H., Egolfopoulos, F.N., and Lynch, E.D. (2008).  Kinetic Mechanisms for Computational Fluid Dynamics (CFD), STTR Phase II Final Report No. AFRL-RZ-WP-TR-2008-2273, AFRL/RZAS, Wright-Patterson Air Force Base.

 

Wickham, D.T., Engel, J.R., Hitch, B.D. and Rooney, S. (2007).  “Additives to Increase Fuel Heat Sink Capacity in a Fuel/Air Heat Exchanger,” Journal of Propulsion and Power, 24(1), pp. 55-63.

 

Hitch, B.D. (2006).  Neural Network-Based Chemical Mechanism and Stiffness Reduction for Reacting Flow CFD, presented at the JANNAF 41st CS/29th APS/23rd PSHS Joint Meeting, San Diego, CA.

 

Wickham, D.T., Engel, J., Rooney, S., and Hitch, B.D. (2005).  "Additives to Increase Fuel Heat Sink Capacity in a Fuel/Air Heat Exchanger," Paper No. AIAA-2005-3916 presented at the 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Tucson, Arizona.

 

Alptekin, G.O., Hitch, B.D., Dubovik, R., and Cesario, M. (2004).  "Sorbents for Mercury Removal from Coal-Fired Power Plants," Western Fuel Symposium, 19th International Conference on Lignite, Brown and Subbituminous Coal, Billings, MT.

 

Hitch, B.D., Weislogel, M.M. and Bacich, M.A. (2004).  "High Performance Oscillatory Heat Transport System," Paper No. 2004-2289 presented at the 34th AIAA Fluid Dynamics Conference and Exhibit, Portland, OR.

 

Wickham, D.T., Engel, J.R., and Hitch, B.D. (2002).  Additives to Increases Fuel Heat Sink Capacity, presented at the 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Indianapolis IN.

 

Hitch, B.D. (2002).  The Effect of Autoignition-Promoting Additives on Deflagration-to-Detonation Transition, presented at the 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Indianapolis IN.

 

Hitch, B.D. and Nabity, J.A. (2002).  “Temperature and Additive Effects on Fuel Spray Ignition, 38th JANNAF Combustion Subcommittee Meeting, Destin FL.

 

Hitch, B.D., Cook, R.L., and Stokowski, D. (2002).  Hypergolicity Agents for H2O2 Bipropellants, SBIR Phase I Final Report published as AFRL Technical Report AFRL-PR-ED-TR-2001-0042.

 

Hitch, B.D. (2002).   “An Analytical Model of the Pulse Detonation Engine Cycle,” presented at the 40th AIAA Aerospace Sciences Meeting, Reno NV.

 

Wickham, D.T., Engel, J.R., B.D. Hitch, and Karpuk, M.E. (2001).  “Initiators for Endothermic Fuels,” Journal of Propulsion and Power, 17(6):1253-1257.

 

Siebenhaar, A., Chen, F.F., Karpuk, M.E., Hitch, B.D., and Edwards, J.T. (1999). “Engineering-Scale Titanium Endothermic Fuel Reactor Demonstration for Hypersonic Scramjet Engine Cooling,” paper no. AIAA-1999-4909 presented at the AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 9th, Norfolk, VA.

 

Maurice, L.Q., T. Edwards, E. Corporan, D. Minus, R. Mantz, R.C. Striebich, S. Sidhu, J. Graham, B. Hitch, D. Wickham, and M. Karpuk (1999).  "Controlled Chemically Reacting Fuels: A New Beginning," ISOABE paper IS-253 presented at the 14th International Symposium on Airbreathing Engines, Florence, Italy.

 

Wickham, D.T., Engel, J.R., Hitch, B.D. and Karpuk, M.E. (1999).  "Initiators for Endothermic Fuels," ISOABE paper IS-069, presented at the 14th International Symposium on Airbreathing Engines, Florence, Italy.

 

Davidson, D.F., Horning, D.C., Hanson, R.K., and Hitch, B.D. (1999).  "Shock Tube Ignition Time Measurements for n-Heptane/O2/Ar with and without Additives," 22nd Int’l. Shock Tube and Shock Wave Symp., London, UK.

 

Davidson, D.F., Hitch, B.D., Horning, D.C., and Hanson, R.K. (1999).  "Shock Tube Ignition Time Measurements for n-Heptane/Oxygen/Argon Mixtures with and without Additives," Proceedings of Joint Meeting of U.S. Combustion Institute Sections, pp. 105-108, Washington, DC.

 

Wickham, D.T., Atria, J.V., Engel, J.R., Hitch, B.D., Karpuk, M.E. and Striebich, R. (1998).  "Formation of Carbonaceous Deposits in a Model Jet Fuel under Pyrolysis Conditions," ACS Preprints, Petroleum Chemistry, 43(3), pp. 428-432.

 

Hitch, B.D., Wickham, D.T., Engel, J.R., and Karpuk, M.E. “Steam Reforming for Hypersonic Aircraft Applications,” 34th JANNAF Combustion Subcommittee, Propulsion Systems Hazards Subcommittee, and Airbreathing Propulsion Subcommittee Joint Meeting, West Palm Beach FL, 27-30 October (1997).

 

Wickham, D.T., Atria, J.R., Engel, J.R., Hitch, B.D., and Karpuk, M.E. (1997).  “Initiators for Endothermic Fuels,” 34th JANNAF Combustion Subcommittee, Propulsion Systems Hazards Subcommittee, and Airbreathing Propulsion Subcommittee Joint Meeting, West Palm Beach FL.

 

Hitch, B.D. and Karpuk, M.E. (1997).  “Experimental Investigation of Heat Transfer and Flow Instabilities in Supercritical Fuels,” AIAA paper 97-3043 presented at the 33rd AIAA/ASME/SAE/ASEE Joint Propulsion Conf., Seattle WA.

 

Bergholz, R.F. and Hitch, B.D. (1992).  "Thermal Management Systems for High-Mach Airbreathing Propulsion," Invited Paper AIAA 92-0151, presented at the 30th Aerospace Science Meeting, Reno, NV.

Hitch, B.D. and Senser, D.W. (1988). "Reduced H2-O2 Mechanisms for Use in Reacting Flow Simulation," AIAA 88-0732, presented at the 26th Aerospace Science Meeting, Reno, NV.

 

Patents

Davis, D.Y. and Hitch, B.D. (1994). "Fluid Channeling System," U.S. Patent No. 5,287,694.