補燃室結(jié)構(gòu)對沖壓發(fā)動機二次燃燒影響研究.pdf

1、西北工業(yè)大學(xué)碩士學(xué)位論文補燃室結(jié)構(gòu)對沖壓發(fā)動機二次燃燒影響研究姓名：許超申請學(xué)位級別：碩士專業(yè)：航空宇航推進理論與工程指導(dǎo)教師：李進賢20070301西北工業(yè)大學(xué)碩七學(xué)位論文ABSTRACTABSTRACTT11isthesisisaimedatthesecondarycombustioninSolidDuetedRocket(SDR)afterburningchamberaccordingtotheanalysisofignition

2、andcombustionofboronparticleandthecalculatingresultsoffuelrichpropellant，acombustionmodeloffuelrichgaswasbuiltBasedonRNGk—sturbulencemodelonestepeddydissipationreactionmodellanddiscreterandomwalkmodel，anumericalanalysism

3、odelofthemixandcombustionintheafterburningchamberiSconstructed11lethreedimensionalreactingflowfieldoftheductedrocketWasnumericallystudiedbyusingFLUENTTheresultsshowthatthenumericalanalysismodelcanreasonablydescribethemix

4、andcombustioninafterburningchamberanditCanbeusedforthenumericalanalysisofthesecondarycombusfioninafterburningchambern他pure—gasnumericalcalculatingresultsshowt11atenoughlengthofafterburuingchamberisnecessayforthesecondary

5、combustion；andthemixandcombustionCallbeintensifiedobviouslybylengtheningtheafterburningchamberbutthisinfluencewouldbecomeweakerastheafterburningchamberiSlongerAnalysisshowsthatthereisaproperdesignvalueforL’／Dabiggervalue

6、isnotusefulforimprovingthesecondarycombustionefficiencyForthispaperthisvalueforL’／Dis375andthefuelresortingtimeisabout291msnletwophasenumericalcalculatingresultsshowthatthesecondarycombustionexistsintheheadandthemiddleof

7、afterburningchamberandtheramjetnozzle；inheadofafterburningchamberandtheramjetnozzle，thelengthofafterburningchamberhaslittleinfluenceonthesecondarycombustionbutinthemiddleoftheafterburningchamberthecombustionefficiencycan

8、beadvancedbylengtheningtheafterburningchamberButtheeffectCanvaryfordifferentafterbumingchamberstructuresn嵋studyalsoshowsthattheignitionandcombustionofboronparticlelieontheresortingtimeandtheenvironmenttemperature，andhave

9、nodirectrelationshipwithafterburningchamber’slengthTheresortingtimecallbedelayedbylengtheningthechamberbuttheenvironmenttemperatureisimportanttoignitionnIeresultssupplyreferencesforthedesignoftheductedrocketandthereseach