Burning Rate Measurement of Thin Sheets of Double Base Propellant (HEN-12).
Interim rept. Jan-Aug 75,
PRINCETON UNIV N J DEPT OF AEROSPACE AND MECHANICAL SCIENCES
Pagination or Media Count:
The special problems associated with determining strand burning rates of very thin 0.040 inches sheets of an NCNG double base propellant specifically HEN-12 were assessed and the accuracies of several strand burning experiments were evaluated. Strand burning experiments were carried out in several media over a range of temperatures 20 to 140 F and pressures 500 to 1500 psi nonflowing N2, N2 flowing parallel to flame, water, and oil. Except for oil, all media produced consistent burning rate data. However, burning in nonflowing N2 minimized the heat loss effects. High speed photographs and extinguished specimens showed the extent that the media retarded the burning rate of the very thin strands. Error analyses indicated that the strand burning method of using nonflowing N2 and conventional breakwire timing of the burning period can be refined to produce errors of less than 0.5 and that the largest source of error is the determination of breakwire position. Author
- Combustion and Ignition
- Solid Rocket Propellants