Accession Number:

AD0730530

Title:

Depth Dependence of Bubble Pulse Periods of Point and End-Fired Line Charges,

Descriptive Note:

Corporate Author:

DEFENCE RESEARCH ESTABLISHMENT ATLANTIC DARTMOUTH (NOVA SCOTIA)

Report Date:

1970-07-13

Pagination or Media Count:

4.0

Abstract:

A theory of the depth dependence of the first bubble pulse period of an infinitely long cylindrical charge is developed. The charge is represented by a cylinder of adiabatic gas and the time equation for expansion from its initial radius to equilibrium is derived as a function of the weight of explosive per unit length and the hydrostatic head. Theoretical results are compared with measured bubble pulse periods of end-fired line charges detonated at depths between 90 and 10,600 ft. The length-to-diameter ratio of the charges varied from 45 to 320 and the weight of explosive per unit length varied from 0.11 to 0.43 lbft. There is substantial agreement between theory and experiment, the agreement improving as the length-to-diameter ratio of the charge increases. Author

Subject Categories:

  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE