generalized theory of rocket propulsion for future space travel外语英文电子书

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1、320J.PROPULSIONVOL.3,NO.4GeneralizedTheoryofRocketPropulsionforFutureSpaceTravelMichaelA.Minovitch*PhaserTelepropulsion,Inc.,LosAngeles,CaliforniaThispaperintroducesageneralizedtheoryofclassicalrocketpropulsionforreusablespacevehicleswhereinthepropellantisatmosphericgas

2、andthepropulsivedeceleratingoracceleratingthrustisgeneratedby,respec-tively,ingestingorexpellingatmosphericgasathighvelocities.Theworkingfluidexpelledduringacceleratingpropulsivemaneuversisautomaticallyreplenishedduringdeceleratingpropulsivemaneuvers.Therefuelingretroth

3、rustisgeneratedbyalarge-diameterhypervelocitygasinletdiffusermountedatthefrontofthevehicle,whichingestsgaswhiletraversingthroughthetenuousupperregionsofaplanet'satmosphere.Thevehicletherebytransfersaportionofitsmomentumtothecollectedgas,whichwasinitiallyatrestintheatmos

4、phere.Thistransferofmomentumgeneratesadeceleratingretrothrustbyareverseapplicationofthetheoryofclassicalrocketpropulsion.Theingestedgasisliquefied,storedonboardthevehicle,andutilizedasapropellantforgeneratingtheacceleratingthrustbyelectricallyacceleratingandexpellingthe

5、gasathighvelocities.Byexpellingthegaswithavelocityexceedingtheinletvelocity,thevehiclebecomesself-refueling.Thevehiclecouldoperateeitherasaself-refuelinginterorbitaltransfervehicleorasaninterplanetarytransfervehiclemovingfromplanettoplanetutilizingeachplanetaryatmospher

6、easpropulsiveworkingfluid.Introductionandthe"massratio"isgivenbythewell-known"rocketTHEfundamentalphysicalprinciplethatallspacepropul-equation,"sionsystemsutilizeforgeneratingpropulsivethrustisbasedonNewton'sthirdlawofmotion:"Foreveryaction(3)thereisanequalandoppositere

7、action."Accordingtothepresentlyconceivedtheoryofrocketpropulsion(whichwillbewhereMlandM2denotethevehicle'smassbeforeandafterreferredtoasthe"classicaltheoryofrocketpropulsion"),expellinganamountofpropellantmp=Mt—M2toachieveaNewton'sprincipleisalwaysappliedinonedirection—

8、expel-velocitychangeAV.lingmass(i.e.,propellant)storedonboardthevehicle,outofItfollowsdirectlyfromEq.(3)thatth