Specific Impulse

specific impulse

[spə′sif·ik ′im‚pəls] (aerospace engineering) A performance parameter of a rocket propellant, expressed in seconds, equal to the thrust in pounds divided by the weight flow rate in pounds per second. Also known as specific thrust.

Specific Impulse

(also specific thrust). The specific impulse of a rocket engine is the ratio of the thrust developed by the engine and the weight of propellant consumed per second. It is a measure of the efficiency of a rocket engine in newton-seconds per kilogram or kilogram-force-seconds per kilogram. As of 1976 the specific impulse of the best liquid-propellant rocket engines was 4.5 kilonewton-seconds per kilogram (kN-sec/kg); for solid-propellant engines it was 2.5–3 kN-sec/kg.

Specific impulse

The impulse produced by a rocket divided by the mass m_p of propellant consumed. Specific impulse I_sp is a widely used measure of performance for chemical, nuclear, and electric rockets. It is usually given in seconds for both U.S. Customary and International System (SI) units.

The impulse produced by a rocket is the thrust force F times its duration t in seconds. The specific impulse is given by the equation below. (1) Its equivalent, specific thrust F_sp, that is sometimes used alternatively, is the rocket thrust divided by the propellant mass flow rate F/m_p. See Thrust

Calculation of specific impulse for the various forms of electric rockets involves electrothermal, resistance or arc heating of the propellant or its ionization and acceleration to high jet velocity by electrostatic or electromagnetic body forces. Ions in the exhaust jets of these devices must be neutralized so the spacecraft will not suffer from space charging or other effects from the plumes of the devices' operation. See Electrothermal propulsion, Ion propulsion, Plasma propulsion, Rocket propulsion

单词	specific impulse
释义	specific impulse specific impulse n. A performance measure for rocket propellants that is equal to units of thrust per unit weight of propellant consumed per unit time. Also called specific thrust. specific impulse n (Astronautics) the ratio of the thrust produced by a rocket engine to the rate of fuel consumption: it has units of time and is the length of time that unit weight of propellant would last if used to produce one unit of thrust continuously specif′ic im′pulse n. a measure of how efficiently a rocket engine burns its fuel. [1945–50] Translations Specific Impulse specific impulse [spə′sif·ik ′im‚pəls] (aerospace engineering) A performance parameter of a rocket propellant, expressed in seconds, equal to the thrust in pounds divided by the weight flow rate in pounds per second. Also known as specific thrust. Specific Impulse (also specific thrust). The specific impulse of a rocket engine is the ratio of the thrust developed by the engine and the weight of propellant consumed per second. It is a measure of the efficiency of a rocket engine in newton-seconds per kilogram or kilogram-force-seconds per kilogram. As of 1976 the specific impulse of the best liquid-propellant rocket engines was 4.5 kilonewton-seconds per kilogram (kN-sec/kg); for solid-propellant engines it was 2.5–3 kN-sec/kg. Specific impulse The impulse produced by a rocket divided by the mass m_p of propellant consumed. Specific impulse I_sp is a widely used measure of performance for chemical, nuclear, and electric rockets. It is usually given in seconds for both U.S. Customary and International System (SI) units. The impulse produced by a rocket is the thrust force F times its duration t in seconds. The specific impulse is given by the equation below. (1) Its equivalent, specific thrust F_sp, that is sometimes used alternatively, is the rocket thrust divided by the propellant mass flow rate F/m_p. See Thrust Calculation of specific impulse for the various forms of electric rockets involves electrothermal, resistance or arc heating of the propellant or its ionization and acceleration to high jet velocity by electrostatic or electromagnetic body forces. Ions in the exhaust jets of these devices must be neutralized so the spacecraft will not suffer from space charging or other effects from the plumes of the devices' operation. See Electrothermal propulsion, Ion propulsion, Plasma propulsion, Rocket propulsion AcronymsSeeISP
随便看	dream away dream ball hidden ability dream big/hustle hard dream big work hard dream boat dream-boat dreamboat dream boats dream-boats dreamboats dreamboat (song) dream body dream boogie dream bradipo racing team dreamcar dream cast dreamcast dreamcast magazine dreamcast-scene dreamcast united dreamcast vms dreamcast vmu dream catcher dreamcatcher dream center teen discipleship

specific impulse

specific impulse

specific impulse

specif′ic im′pulse

Specific Impulse

specific impulse

Specific Impulse

Specific impulse