等熵轻质活塞风洞中活塞行程、速度和压力的变化

17320029JOURNALOFEXPERIMENTALMECHANICSVol.17No.3Sep.2002:100124888(2002)0320333207X,,(,516200093):.,.,.,,.:;;;:O359.4:A1.1.,.1[1].,(1),,,,.(2),.(2),.,,(2),.[2],(2),.,X:2002201205;:2002207220:(1946-),,..©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1.,(2)600*700*,35m.,,,.,,.,.,.2,:(1),;(2),,.60mös,0.15%,,;(3),,.2.1[3],[1]P0WC-1+mrRTrC-1+mrRTr=PWC-1,t(1)mr,mr,t.P=P0+CmrRTrW,,mr=mart:P=P0+CmarRTrWt(1)433(2002)17©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.t=tc,Pq,Pq-P0tc=CMarRTrW(2)(1):P=P0+Pq-P0tct(3)(2)tc=(Pq-P0)WCmarRTr(4):P0WC=PW2Cx,L,P=P0LL-xC(5)(3),t:x=L-L1+PqP0-1tct-1C(6):up=LCPqP0-1tct+1-C+1CPqP0-1tc(7)(7),,t=0,:upmax=LCPqP0-1tC=marRTrAP0,(6)(7),x=xLt=ttcP=PqP0up=upupmax(6)x=1-[1+(P-1)t]-1C(6)P(7)up=[1+(P-1)t]-C+1C=(1-x)C+1(7)2.2,,,,,,trun.(1)Pq=P0+CmarRTrWtc(8):5333:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.xq=L1-PqP0-1C(9):xq=1-(P)-1C(9)trun,Pq,.Va1=marRTrPq.,,:ulp=marRTrPqA(10)ulp=ulpupmax=P0Pq=1P(11),t=tc,,,$uc,$uc=ulp-upût=tc$ucupmax=1P[1-(P)-1C](12)ulpupût=tc=(P)1C(13):trun=LPqAmarRTrPqP0-1C(14),:x=xût=tc+ulp(t-tc)(tcttrun)(15)3CT21[4]3.25m,d=102mm,60g,Pr=39.48,Tr=20,Pq=12,0.1,[1],A3r=66mm2.,0.4,83%,(2)2,600K.63.35mös,upût=tc0.9mös,1.4%,5.3mös,upût=tc5.9.27.[4].2,[5],,1.633(2002)17©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2345,(xöLtötc)6,upupmaxttc7upupmaxxL7333:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1t()0.01730.05060.10150.14910.20340.25190.30260.35000.3997P(Pa)(105)1.5132.4923.9775.3616.9358.3419.81211.18612.624(1)(105)1.4912.4123.8195.1346.6357.9769.37810.68812.0624.45à..42,,,,,.,5,t25à,t25à,.(2).,6,t25à,90à,75à,,8.6à.47,,,,(12),,.0.9mös,5.3mös,4.9..5(1).(2),.(3)12,.(4)25àtc,75àtc,.,.A-L-m-ma-P-Pq-P-,PqP0R-T-833(2002)17©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.t-tc-t-,,ttctrun-u-ul-upmax-u-,uupmaxupût=tct=tc,$uc-ul-upût=tcVa-W-x-xq-t=tc,xC-:0-1-(1)2-(1)r-p-:[1]JonesTV,SchultzDLandHendleyAD.OntheFlowinanIsentropicLightPistonTunnel[R].ARC:R&M,1973,3731.[2]RichardsBE,VillcJPandAppelsC.FilmCooledSmallTurbineBladesResearch2FilmCoolingEffec2tivenessatSimulatedTurbineCondition[R].VKITN120,June1976.[3].[M].:,1995.[4]RichardsBE,VillcJPandSalemiC.FilmCoolingofHeatedTurbineSurfaceatSimulatedCondition[J].AIAAöSAE13thPropulsionConference,July,1977,11-13.[5],,.[M].:,1996.AnalysisforthePistonMotioninanIsotropicLightPistonTunnelLILi2ren,KONGFan2lin,LINXia(CollegeofPowerEngineering,UniversityofShanghaiforScienceandTechnology,Shanghai,200093)Abstract:Isotropiclightpistonwindtunnelisusefulforstudyingtheinstantaneousheattrans2fer,forexample,thecoolingofbladesingasturbine.Inthispaper,thepistonmotioninthetunnelisanalyzedbyaerodynamictheory.Keywords:windtunnel;piston;compression;isotropic9333:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.