High-speed photography of the bubble generated by an airgun
Journal Article
·
· Geophysical Prospecting
- IKU Petroleum Research, Trondheim (Norway)
High-speed photography has been used visually to study the shape, surface, turbulence and behavior of an underwater oscillating bubble generated by an airgun. The source wa a BOLT airgun with a chamber volume of 1.6 cu.in., placed in a 0.85 m{sup 3} tank at 0.5 m depth. Near-field signatures were also recorded in order to compare the instant photographs of the oscillating bubble with the pressure field recorded about 25 cm from the gun. Estimations of the bubble-wall velocity and bubble radius estimated from high-speed film sequences are also presented, and are compared with modeled results. The deviation between the modeled and measured bubble radii was at most 9%. In order to check the capacity for transmission of light through the bubble, a concentrated laser beam was used as illumination. The authors found that the air bubble is a strong scattering medium of laser light, hence the bubble is opaque.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 207852
- Journal Information:
- Geophysical Prospecting, Journal Name: Geophysical Prospecting Journal Issue: 1 Vol. 44; ISSN GPPRAR; ISSN 0016-8025
- Country of Publication:
- United States
- Language:
- English
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