User:Milton Beychok/Sandbox: Difference between revisions
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==Rocket thrust and specific impulse== | ==Rocket thrust and specific impulse== | ||
Thrust is the [[force]] ('''''F''''') which moves a rocket through the air. Thrust is generated by the rocket engine through the reaction of [[acceleration|accelerating]] a mass of gas. The gas is accelerated to the the rear by the venturi effect of the deLaval nozzle and the rocket is accelerated in the opposite direction. Force may be mathematically expressed as: | Thrust is the [[force]] ('''''F''''') which moves a rocket through the air. Thrust is generated by the rocket engine through the reaction of [[acceleration|accelerating]] a mass of gas. The gas is accelerated to the the rear by the venturi effect of the deLaval nozzle and the rocket is accelerated in the opposite direction. Force may be mathematically expressed as:<ref>[http://exploration.grc.nasa.gov/education/rocket/specimp.html Specific Impulse] from a website page of [[National Aeronautics and Space Administration]] (NASA)<ref> | ||
:<math>F = \dot {m} V_e + (p_e - P_0)A_c</math> | :<math>F = \dot {m} V_e + (p_e - P_0)A_c</math> | ||
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:<math>F = \dot {m} V_{eq} = \dot {m} \left [V_e + \frac {(p_e - P_0)A_c}{\dot {m}} \right ]</math> | :<math>F = \dot {m} V_{eq} = \dot {m} \left [V_e + \frac {(p_e - P_0)A_c}{\dot {m}} \right ]</math> | ||
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Revision as of 15:58, 24 March 2010
Rocket thrust and specific impulse
Thrust is the force (F) which moves a rocket through the air. Thrust is generated by the rocket engine through the reaction of accelerating a mass of gas. The gas is accelerated to the the rear by the venturi effect of the deLaval nozzle and the rocket is accelerated in the opposite direction. Force may be mathematically expressed as:<ref>Specific Impulse from a website page of National Aeronautics and Space Administration (NASA)<ref>
and also this form (by defining a new term veq :
![{\displaystyle F={\dot {m}}V_{eq}={\dot {m}}\left[V_{e}+{\frac {(p_{e}-P_{0})A_{c}}{\dot {m}}}\right]}](https://wikimedia.org/api/rest_v1/media/math/render/svg/553a0d3d839fca9262578e8eb92a51707a59a33f)