- Pulsed rocket motor
A pulsed rocket motor is typically defined as a multiple
pulsesolid propellant rocket motor. This designovercomes 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 onboard algorithmor 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
ignitionof 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 managementof the propellant burn can be accomplished. Each pulse can have different thrust level, burn time, and achieved specific impulse depending on the type of propellant used, its burn rate, its grain design, and the current nozzle throatdiameter. [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.
Pulse jet engine– a very simple jet enginewhich used ignited "pulses" of gasor atomized fuelfor propulsion.
Nuclear pulse propulsion
Wikimedia Foundation. 2010.
Look at other dictionaries:
Rocket engine nozzle — A rocket engine nozzle is a propelling nozzle usually of the de Laval type used in a rocket engine to expand and accelerate the combustion gases, from burning propellants, so that the exhaust gases exit the nozzle at hypersonic… … Wikipedia
Rocket engine — RS 68 being tested at NASA s Stennis Space Center. The nearly transparent exhaust is due to this engine s exhaust being mostly superheated steam (water vapor from its propellants, hydrogen and oxygen) … Wikipedia
Rocket — This article is about vehicles powered by rocket engines. For other uses, see Rocket (disambiguation). A Soyuz U, at Baikonur Site 1/5 A rocket is a missile, spacecraft, aircraft or other vehicle which obtains thrust from a rocket engi … Wikipedia
Monopropellant rocket — A monopropellant rocket (or monoprop rocket ) is a rocket that uses a single chemical as its propellant. Contents 1 Chemical reaction monopropellant rockets 2 Solar thermal monopropellant thrusters 3 See also … Wikipedia
Solid-fuel rocket — A solid rocket or a solid fuel rocket is a rocket with a motor that uses solid propellants (fuel/oxidizer). The earliest rockets were solid fueled, powered by gunpowder, used by the Chinese and Arabs in warfare as early as the 13th century. All… … Wikipedia
aerospace industry — Introduction assemblage of manufacturing concerns that deal with vehicular flight within and beyond the Earth s atmosphere. (The term aerospace is derived from the words aeronautics and spaceflight.) The aerospace industry is engaged in the … Universalium
9K33 Osa — SA 8 redirects here. For the Apollo flight, see A 104 (SA 8). 9K33 Osa (NATO reporting name: SA 8 Gecko) 9K33 OSA transporter erector launcher and radar(TELAR) … Wikipedia
launch vehicle — Aerospace. a rocket used to launch a spacecraft or satellite into orbit or a space probe into space. [1955 1960] * * * Rocket system that boosts a spacecraft into Earth orbit or beyond Earth s gravitational pull. A wide variety of launch vehicles … Universalium
9K22 Tunguska — Infobox Weapon name=9K22 Tunguska NATO reporting name: SA 19 Grison caption=9K22 Tunguska M Gun/Missile Air Defence System. origin=flagcountry|Soviet Union type=Tracked SAM system is ranged= is bladed= is explosive= is artillery= is vehicle=yes… … Wikipedia
Mass Driver 1 — Constructed in 1976 and 1977, Mass Driver 1 was an early demonstration of the concept of the mass driver, a form of electromagnetic launcher, which in principle could also be configured as a rocket motor, using asteroidal materials for reaction… … Wikipedia