NASA NACA-TN-4334-1958 Lag in pressure systems at extremely low pressures《在超低压力下压力系统的延迟》.pdf

1、-bC3a-)TECHNICAL NOTE 4334LAGIN PRESSURES!G3TEMSAT EXTREMELYLOWPRESSURESByWilliamT. DavisLangleyAeronauticalLaboratoryLangleyField, Va.WashingtonSeptember1958Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TECHLIBRARYKAFB,NMlWIONALADVISORYCC$4141TIEE

2、 IlllllllllllllllllllillllllllFORABROl! Ci13b73J”TECHNICALllOTE4334LAGINPRESSUREA theoreticalformulaSYSTBMSATEXIREMELYByWilliamT.DavisSIJMWRYfordeterminingtimeLowPRESSURESlagsinpressure-measuringssmtemsatallpressures,includingextrernel.ylowpressureswheremolecularfowoccurs,is-derived% 131.,easingA4.1

3、2254 .1225 Decreasing2 A0: .0557 Increasing.o DecreasingI AAL1.15.56t:2.78 J1.39.834, .5%A, SecFigure 8.-Variationof mean pressuxe in coppertubingwith t5me constant. (Filledsymbols indi-cate region of transienteffects.)Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-