UNDERWATER ELECTRODELESS SPARK SOUND SOURCE.
Annual technical rept.
AVCO CORP LOWELL MASS AVCO SPACE SYSTEMS DIV
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The electrodeless spark principle involves the generation of an underwater electric spark in the orifice of a dielectric barrier which separates two volumes of sea water. Research on impulse sound generation by such a principle is described which shows that the electrodeless spark discharge can be typified as 1 Extremely reproducible 2 Capable of routine generation of peak pressures corresponding to 134 dbmicro b at 1 yard 3 Pulse lengths of 50 microsec 4 Extremely precise time of ignition 5 Suitable for arrayed operation, i.e. no interaction between elements which are electrically paralleled. 6 A potential to suppress, and presumably to essentially eliminate, the secondary collapse, or bubble pulse 7 Essentially omnidirectional except in some configuration. The dynamic equations of motion of a spherical bubble are discussed and aspects developed which are pertinent to the electrodeless spark dynamics. Parametric surveys of the electrodeless spark discharge are summarized, and device design and contruction are described. Author
- Physical and Dynamic Oceanography
- Acoustic Detection and Detectors