Hydraulic ram shock wave and cavitation effects on aircraft fuel cell survivability.
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Authors
Holm, Dwight Patrick.
Subjects
hydraulic ram
aircraft fuel cell survivability
aircraft fuel cell survivability
Advisors
Fuhs, Allen E.
Date of Issue
1973-09
Date
September 1973
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Hydraulic ram is the dynamic loading of fuel tanks when impacted by
bullets or other projectiles During impact and penetration of the fuel cell,
intense pressure waves are generated by the projectile.
A ballistic range was built and experimental testing was conducted
to study hydraulic ram phenomena. A 0.22 caliber rifle was used to accelerate
projectiles at velocities in the range of 0.38 km/sec into a transparent,
water filled tank. Shape and intensity of the shock wave pressure
pulse induced as a result of projectile impact were determined using a dual
shadowgraph system. Peak pressures were found to be as high as 4.50 x
10³ kg/cm². The rate of energy transfer to the fluid by the projectile was
determined experimentally and compared with analytical predictions. A
characteristic time was defined, establishing the separation point between
the shock and cavity phases of hydraulic ram.
Type
Thesis
Description
Series/Report No
Department
Aeronautics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.