動(dòng)力渦輪驅(qū)動(dòng)的逆升壓式空氣循環(huán)制冷系統(tǒng)的設(shè)計(jì)與優(yōu)化.pdf

1、南京航空航天大學(xué)碩士學(xué)位論文動(dòng)力渦輪驅(qū)動(dòng)的逆升壓式空氣循環(huán)制冷系統(tǒng)的設(shè)計(jì)與優(yōu)化姓名：郭僑申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：人機(jī)與環(huán)境工程指導(dǎo)教師：劉衛(wèi)華20090301動(dòng)力渦輪驅(qū)動(dòng)的逆升壓式空氣循環(huán)制冷系統(tǒng)的設(shè)計(jì)與優(yōu)化IIAbstractEximiousenvironmentcontrolsystem(ECS)oftheelectronicpodisthepreconditionofitssafehighefficiencywk.ReverseB

2、ootstrapAirCycleRefrigerationSystemDrivenbyPoweredTurbinewhichhassimplestructurelightweightlowcompensatylossgoodadaptabilityisjusttherightECSthatcanbeusedinelectronicpods.InthispaperfirstlymathematicmodelsofequipmentsinR

3、everseBootstrapAirCycleRefrigerationSystemDrivenByPoweredTurbinesuchasairinterfacecoolingturbinecompressheatexchangeraresummedup.Secondlyacomputationalmethodwhichisusedtomatchingallpartsofsystemswitheachotherispresentedb

4、asedontheacteristicthatcompressturbinesharethesamerotatingaxis.FinallyaccdingtothesystemcompensatylossanoptimizationalgithmmethodofECSispresentedbasedonwhichtheresearchonECSoptimizationisdone.Conclusionsareasfollows1)Hea

5、tload——withtheincrementofheatloadatdesignpointmassflowrateofcoolingturbineweightofsystemthedragfceofairinterfacegrowupwhenatthemaximumheatloadstateboththemaximummassflowratedragfcedecrease.2)Machnumber――asthemachnumberin

6、creasesmassflowrateofcoolingturbinedecreasesgetstheminimumatthemaximumsystemheatload.BothweightofsystemdragfceofairinterfaceincreasewithMachnumber.Atthesametimedragfceofairinterfacefollowsacurvelikeparabolafirstlyitdesce

7、ndswithMachnumberwhenMachnumberbecomessufficientlylargeitends.3)Height——Massflowrateofsystemsystemtotalweightdragfceofairinterfacedescendwiththeheightofdesignpoint.Butwhenatthemaximumheatloadpointthemaximumdragfceofairin

8、terfacefollowsacurvelikeparabolafirstlyitdescendswithheightwhenheightbecomessufficientlylargeitendswithheight.4)Thesystemoptimizationbasedontheenvelopeofelectronicpodpresentsthatwhensettingtheparameters——heightequalsto8k

9、mmachnumberequalsto0.781systemheatloadequalsto2.998kw――asdesignpointthesystemcompensatylossgetsitsminimumincurrentenvelopewhichmeansthebestdesignpointisfound.KeyWds:poweredturbineaircyclesystemcompresspodrefrigerationsys