nozzle
Quick Summary
A nozzle is a tapered tube that causes a pressure drop in a liquid flowing through it, allowing the rate of flow to be calculated. In rocket propulsion, nozzles are crucial components that accelerate hot gaseous reaction products to high exhaust velocities.12
Rocket Nozzle Mechanics
A rocket nozzle typically has a convergent section leading to a throat, where the gas velocity reaches the speed of sound. Beyond the throat, the channel diverges, accelerating the flow to supersonic speeds and decreasing the pressure. This design is essential for generating thrust by efficiently expelling exhaust gases. Nozzles often incorporate insulation or high-temperature materials like graphite to withstand the extreme heat of the exhaust. Some nozzles also include mechanisms for steering the rocket by controlling the direction of the exhaust flow.2
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jet engineLow-bypass turbofans and turbojets…with an afterburner, the exhaust nozzle must have a variable throat area to accommodate the large variations in volumetric flow rate between the very hot exhaust stream from the operating afterburner and the cooler airstream discharged from the engine when the afterburner is not in use. Engines intended for supersonic…
Read More…with an afterburner, the exhaust nozzle must have a variable throat area to accommodate the large variations in volumetric flow rate between the very hot exhaust stream from the operating afterburner and the cooler airstream discharged from the engine when the afterburner is not in use. Engines intended for supersonic…
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rocketSolid-rocket motorsThe principal requirement for a nozzle, common to both solids and liquids, is that it be able to produce a supersonic flow of the exhaust gas from the combustion chamber pressure to an exterior pressure (or thereabouts), a function that is accomplished by proper contouring and sizing of the conduit.…
Read MoreThe principal requirement for a nozzle, common to both solids and liquids, is that it be able to produce a supersonic flow of the exhaust gas from the combustion chamber pressure to an exterior pressure (or thereabouts), a function that is accomplished by proper contouring and sizing of the conduit.…
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turbinePrincipal components…steam (it also accommodates fixed nozzle passages or stator vanes through which the steam is accelerated before being directed against and through the rotor blading), (3) the speed-regulating mechanism, and (4) the support system, which includes the lubrication system for the bearings that support the rotor and also absorb any…
Read More…steam (it also accommodates fixed nozzle passages or stator vanes through which the steam is accelerated before being directed against and through the rotor blading), (3) the speed-regulating mechanism, and (4) the support system, which includes the lubrication system for the bearings that support the rotor and also absorb any…
Read More- turbineImpulse turbines
…water through a carefully shaped nozzle. The jet, discharged into air, is directed onto curved buckets fixed on the periphery of the runner to extract the water energy and convert it to useful work.
Read More…water through a carefully shaped nozzle. The jet, discharged into air, is directed onto curved buckets fixed on the periphery of the runner to extract the water energy and convert it to useful work.
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