PERFORMANCE AND NOISE SUPPRESSION TESTS OF A WATER CANNON

Additional laboratory tests were conducted with a high pressure water cannon which had previously been developed for rock tunneling experiments. Pulsed jets were fired against copper samples to correlate crater volume with input energy. Research was conducted to devise a method for measuring the water jet velocity when air at atmospheric pressure was used in the exponential nozzle prior to firing. The nozzle design was modified in order to provide improved performance when air is used instead of vacuum in the nozzle. An improved jet noise suppressor was tested in shots against 2 ft. cubes of Barre granite. Peak noise intensity was reduced to 124 DB at 26 ft. (8 m) range.

• Supplemental Notes:
  • See also PB-233 006.
• Corporate Authors:

  Terraspace, Incorporated

  304 North Stonestreet Avenue
  Rockville, MD  United States  20850

  Federal Railroad Administration

  Office of Research and Development, 1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Cooley, W C
• Publication Date: 1974-9

Media Info

• Pagination: 35 p.

Subject/Index Terms

• TRT Terms: Cratering; Excavation and tunneling; Fracture mechanics; Hydraulic jetting; Noise control; Nozzles; Rock excavation; Rock mechanics; Tunneling; Water cannons
• Uncontrolled Terms: Noise reduction
• Old TRIS Terms: Hydraulic jets
• Subject Areas: Bridges and other structures; Construction; Geotechnology; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00090048
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: TR-406-2 Final Rpt.
• Contract Numbers: DOT-FR-20042
• Files: TRIS, USDOT
• Created Date: Apr 22 1975 12:00AM