Accession Number:

ADA235084

Title:

Microwave Interferometric Measurements of Particle and Wave Velocities in Porous Media.

Descriptive Note:

Progress rept. Jan 1984-Jun 1988

Corporate Author:

NAVAL SURFACE WARFARE CENTER SILVER SPRING MD

Personal Author(s):

• Glancy, Brian C.
• Krall, Albert D.

Report Date:

1990-01-11

Pagination or Media Count:

81.0

Abstract:

A microwave interferometric technique was developed and integrated with several experimental arrangements for detonation physics studies. The interferometer records the Doppler shift of reflections associated with moving material discontinuities and ionization fronts. The analysis of those Doppler shifts provide quantitative velocities which are useful in the development and verification of physical and theoretical models used to depict the processes. Initial circuit criteria such as impedance matching, dielectric measurements, and waveguide modes are considered. The interferometer has been applied to detonation velocity measurements, detonation transfer tests, gap testing, and piston driven compaction experiments. In addition to the relatively simple analysis used to obtain these results, investigations into higher resolution data reduction aided by computer synthesis and Fourier transforms are also discussed.

Descriptors:

• *TEST AND EVALUATION
• FOURIER TRANSFORMATION
• MEASUREMENT
• PISTONS
• VERIFICATION
• MODELS
• SYNTHESIS
• COMPUTERS
• MATERIALS
• THEORY
• DIELECTRICS
• MOTION
• WAVEGUIDES
• MICROWAVES
• REFLECTION
• HIGH RESOLUTION
• INTERFEROMETRY
• PARTICLES
• PHYSICS
• DATA REDUCTION
• CIRCUITS
• TRANSFER
• RECORDS
• DISCONTINUITIES
• WAVES
• DETONATIONS
• POROUS MATERIALS
• DOPPLER EFFECT
• INTERFEROMETERS
• IMPEDANCE MATCHING
• COMPACTING
• VELOCITY

Subject Categories:

• Radiofrequency Wave Propagation
• Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE