Pulsed rocket motor
- Pulsed rocket motor
A pulsed rocket motor is typically defined as a multiple
pulse solidpropellant rocket motor . Thisdesign overcomes the limitation of solid propellant motors that they cannot be easily stopped and reignitied. The pulse rocket motor allows the motor to be burned in segments (or pulses) that burn until completion of that segment. The next segment (or pulse) can be ignited on command by either an onboardalgorithm or in pre-planned phase. All of the segments are contained in a single rocket motor case as opposed to staged rocket motors. [Jensen, G.E, & Netzer D.W. Tactical Missile Propulsion, AIAAProgress in Astronautics and Aeronautics Volume 170 1996]The pulsed rocket motor is made by pouring each segment of propellant separately. Between each segment is a that prevents the other segments from burning until ignited. At
ignition of a second pulse the burning of the propellant generally destroys the barrier.The benefit of the pulse rocket motor is that by the command ignition of the subsequent pulses, near optimal
energy management of the propellant burn can be accomplished. Each pulse can have differentthrust level ,burn time , and achieved specific impulse depending on the type of propellant used, its burn rate, its grain design, and the currentnozzle throat diameter. [Phillips, C.A, "Energy Management for a Multiple Pulse Missile", AIAA Paper 88-0334, Jan., 1988]The Chinese have begun deployment of a two-pulse air-to-air missile the
PL-12 . [Aviation Week and Space Technology May7/14, 2007 p40-41] .The proper method to design a high performance rocket motor is covered under
Defense Acquisition Workforce Improvement Act .References
ee also
*
Pulse jet engine – a very simplejet engine which used ignited "pulses" ofgas oratomized fuel for propulsion.
*Nuclear pulse propulsion
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