Accession Number : AD0637161

Title :   NON-ACOUSTIC COMBUSTION INSTABILITY OF SOLID PROPELLANTS.

Descriptive Note : Technical rept.

Corporate Author : UTAH UNIV SALT LAKE CITY DEPT OF CHEMICAL ENGINEERING

Personal Author(s) : Beckstead,M. W. ; Ryan,Norman W. ; Baer,Alva D.

Report Date : 01 AUG 1966

Pagination or Media Count : 170

Abstract : Non-acoustic combustion instability was examined in an uncatalyzed, a catalyzed, and two aluminized composite propellants. These propellants were studied, burning cigarette fashion, in a burner capable of operating at values of L* as small as 5 cm. It was observed that the frequency of the pressure oscillations varied with the value of L*, frequency decreasing with increaseing L*. The data were correlated by plotting frequency versus the reciprocal of L*, yielding a series of constant pressure curves. This pressure effect was eliminated by using dimensionless variables, allowing all of the data for a given propellant to be correlated along the same line. A one-dimensional model is proposed that considers sinusoidal perturbations, allowing for growth of the disturbance. The pressure, the burning rate, the distributed temperature in the propellent, and the energy flux from the burning gases are the quantities perturbed. (Author)

Descriptors :   (*SOLID ROCKET PROPELLANTS, *COMBUSTION), (*SOLID PROPELLANT ROCKET ENGINES, STABILITY), (*COMPOSITE PROPELLANTS, COMBUSTION), OSCILLATION, FREQUENCY, PRESSURE, BURNING RATE, TEMPERATURE, ENERGY, COMBUSTION CHAMBER GASES

Subject Categories : Combustion and Ignition
      Solid Propellant Rocket Engines
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE