A Solid Propellant Charge Design with Negative Effective Pressure Exponent Using Forced Cone Burning
WEAPONS SYSTEMS RESEARCH LAB ADELAIDE (AUSTRALIA)
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A novel method of making a solid propellant rocket motor or gas generator charge with a negative effective burning rate pressure exponent negative drbdP is presented. The negative exponent characteristic can be obtained independently of burning rate and other bulk propellant properties specific impulse, flame temperature, signature, mechanical properties, etc which can be chosen as required. The charge is constructed with a core, or several cores, of propellant with an intrinsically negative pressure exponent with the bulk of the charge made up of any propellant with a lower burning rate than the core propellant over the pressure range of interest. The core propellant burning rate range can be adjusted to give the desired value by a method of burning rate acceleration. Suitable core materials and burning rate acceleration methods are reported, and the use of such a charge in a rocket motor or gas generator with a variable area nozzle to give controllable thrust is discussed.
- Solid Propellant Rocket Engines
- Solid Rocket Propellants