Converting acoustic energy into useful other energy forms

Putterman, Seth J; Barber, Bradley Paul; Hiller, Robert Anthony; Lofstedt, Ritva Maire Johanna

Title: Converting acoustic energy into useful other energy forms

Patent · Wed Jan 01 00:00:00 EST 1997

OSTI ID:871105

Putterman, Seth J ^[1]; Barber, Bradley Paul ^[2]; Hiller, Robert Anthony ^[3]; Lofstedt, Ritva Maire Johanna ^[3]

Sherman Oaks, CA
Northridge, CA
Los Angeles, CA

Sonoluminescence is an off-equilibrium phenomenon in which the energy of a resonant sound wave in a liquid is highly concentrated so as to generate flashes of light. The conversion of sound to light represents an energy amplification of eleven orders of magnitude. The flashes which occur once per cycle of the audible or ultrasonic sound fields can be comprised of over one million photons and last for less 100 picoseconds. The emission displays a clocklike synchronicity; the jitter in time between consecutive flashes is less than fifty picoseconds. The emission is blue to the eye and has a broadband spectrum increasing from 700 nanometers to 200 nanometers. The peak power is about 100 milliWatts. The initial stage of the energy focusing is effected by the nonlinear oscillations of a gas bubble trapped in the liquid. For sufficiently high drive pressures an imploding shock wave is launched into the gas by the collapsing bubble. The reflection of the shock from its focal point results in high temperatures and pressures. The sonoluminescence light emission can be sustained by sensing a characteristic of the emission and feeding back changes into the driving mechanism. The liquid is in a sealed container and the seeding of the gas bubble is effected by locally heating the liquid after sealing the container. Different energy forms than light can be obtained from the converted acoustic energy. When the gas contains deuterium and tritium there is the feasibility of the other energy form being fusion, namely including the generation of neutrons.

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Research Organization:: Univ. of California (United States)

DOE Contract Number:: FG03-92ER12124

Assignee:: Regents of University of California (Oakland, CA)

Patent Number(s):: US 5659173

OSTI ID:: 871105

Country of Publication:: United States

Language:: English

References (20)

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Related Subjects

converting
acoustic
energy
useful
forms
sonoluminescence
off-equilibrium
phenomenon
resonant
sound
wave
liquid
highly
concentrated
generate
flashes
light
conversion
represents
amplification
eleven
magnitude
occur
cycle
audible
ultrasonic
fields
comprised
million
photons
100
picoseconds
emission
displays
clocklike
synchronicity
jitter
time
consecutive
fifty
blue
eye
broadband
spectrum
increasing
700
nanometers
200
peak
power
milliwatts
initial
stage
focusing
effected
nonlinear
oscillations
gas
bubble
trapped
sufficiently
drive
pressures
imploding
shock
launched
collapsing
reflection
focal
results
temperatures
sustained
sensing
characteristic
feeding
changes
driving
mechanism
sealed
container
seeding
locally
heating
sealing
obtained
converted
contains
deuterium
tritium
feasibility
form
fusion
namely
including
generation
neutrons
light emission
shock wave
acoustic energy
sealed container
peak power
gas bubble
highly concentrated
ultrasonic sound
gas contains
emission displays
energy form
initial stage
emission display
rate flashes
sound wave
locally heating
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Title: Converting acoustic energy into useful other energy forms

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References (20)

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