A non-acoustic instability (NAI) was encountered during the development of a 75,000 pound thrust hybrid rocket motor. The frequency of oscillation is related to the fill/flush time of the combustion chamber. A correlation for solid rocket motor NAI frequencies is reviewed and compared to hybrid motor results. Several causal mechanisms are postulated and examined experimentally to determine their role in NAI. Inadequate LOx vaporization is identified as the proximate cause of NAI. Methods for enhancing vaporization are discussed and test results presented. The use of splashblocks for suppressing NAI is examined, and minimum required splashblock areas determined.
Non-Acoustic Combustion Instability in Hybrid Rocket Motors
1990
11 pages
Report
Keine Angabe
Englisch
NON-ACOUSTIC COMBUSTION INSTABILITY IN HYBRID ROCKET MOTORS
British Library Conference Proceedings | 1990
|Combustion Instability in Solid Rocket Motors
NTIS | 1989
|