Accession Number:

AD0756912

Title:

An Experimental Study of the Pressure Distribution in Burning Flaws in Solid Propellant Grains

Descriptive Note:

Final rept. 15 Mar 71-15 Aug 72 on Task 1,

Corporate Author:

UTAH UNIV SALT LAKE CITY COLL OF ENGINEERING

Report Date:

1972-10-01

Pagination or Media Count:

67.0

Abstract:

Cracks or flaws in solid propellant grains have been responsible for the failure of many rocket motors and there has been much concern in the solid propellant rocket industry as to the extent that flaws could contribute to catastrophic failure. The study was conducted to determine experimentally what the pressure distribution in a solid propellant debond would be after the burning had propagated into it. The bulk of the work was experimental with the results being compared to a computer solution for flow in a variable area duct with mass addition. Results are given for three separate debond angles at several different chamber pressures. With a knowledge of what the pressure distribution will be within a burning flaw, predictions can be made as to the probability of a flaw or crack contributing to catastrophic failure.

Subject Categories:

  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE