2/10/00 California Institute of Technology Graduate Aeronautical 1 Detonation Research for Propulsion Applications Sponsored by ONR MURI “Multidisciplinary Study of Pulse Detonation Engines” PSU/CIT/Princeton Team J. E. Shepherd, E. Schultz, J. Austin, T. Chao, E. Wintenberger, P. Hung Graduate Aeronautical Laboratories California Institute of Technology Pasadena, CA 91125 USA Midyear Review, San Jose, CA, February 10-11, 2000
Detonation Research for Propulsion Applications. J. E. Shepherd, E. Schultz, J. Austin, T. Chao, E. Wintenberger, P. Hung Graduate Aeronautical Laboratories California Institute of Technology Pasadena, CA 91125 USA. - PowerPoint PPT Presentation
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2/10/00 California Institute of TechnologyGraduate Aeronautical Laboratories
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Detonation Research for Propulsion Applications
Detonation Research for Propulsion Applications
Sponsored by ONR MURI “Multidisciplinary Study of Pulse Detonation Engines” PSU/CIT/Princeton Team
J. E. Shepherd, E. Schultz, J. Austin, T. Chao, E. Wintenberger, P. Hung
Graduate Aeronautical LaboratoriesCalifornia Institute of Technology
Pasadena, CA 91125 USA
Midyear Review, San Jose, CA, February 10-11, 2000
2/10/00 California Institute of TechnologyGraduate Aeronautical Laboratories
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Activities at CaltechActivities at Caltech
• Cellular structure characterization
• Initiation
• Diffraction
• Structural and thermal response
2/10/00 California Institute of TechnologyGraduate Aeronautical Laboratories
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Cellular StructureCellular Structure
• Purpose: characterize detonations in JP-5, JP-8, JP-10 fuels (measurement
2/10/00 California Institute of TechnologyGraduate Aeronautical Laboratories
1. Redesigned using FEM2. Stronger flange-tube connections3. Thicker flanges4. Double number of fasteners5. Heating system a) 8 zones of control b) 10 kW total power6. Higher temperature seals
2/10/00 California Institute of TechnologyGraduate Aeronautical Laboratories
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Detonation initiationDetonation initiation
• DDT time scale analysis
• Ideal vs real performance with DDT
2/10/00 California Institute of TechnologyGraduate Aeronautical Laboratories
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DDT ScalingDDT Scaling
2/10/00 California Institute of TechnologyGraduate Aeronautical Laboratories
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0
2
4
6
8
10
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0 100 200 300 400
time
pre
ssu
re
end wall
exit
Ideal PDE ImpulseIdeal PDE Impulse
Computation by H. Hornungusing Amrita (AMR)q/RT1 = 40, = 1.2Taylor-Zeldovich IC
2/10/00 California Institute of TechnologyGraduate Aeronautical Laboratories
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DiffractionDiffraction
• Test series with H2, C2H4, C3H8 fuels– Ar, He, N2, CO2 dilution.– Model development
2/10/00 California Institute of TechnologyGraduate Aeronautical Laboratories
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Structural responseStructural response
• Response of tube to detonation loading
2/10/00 California Institute of TechnologyGraduate Aeronautical Laboratories
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CIT PresentationsCIT Presentations
• Structural response (Joe Shepherd)
• Diffraction (Eric Schultz)
• DDT and ideal performance (Jo Austin)
2/10/00 California Institute of TechnologyGraduate Aeronautical Laboratories