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STATIC, STAGNATION, AND DYNAMIC PRESSURE

STATIC, STAGNATION, AND DYNAMIC PRESSURESB ernoulli equation is Inthisequationpiscalledstaticpressure, ,iftheinstrumentwerestaticwithrespecttof lowingfluid, , , tap ,drilledcarefullyinthewall, gzVp ME304 51 Inafluidstreamfarfromawall,orwherestream linesarecurved,accuratestaticpressuremea surementscanbemadebycarefuluseofastaticp ressureprobe, , (Pitottube).Inincompressibleflow,applyin gBernoulliequationbetweenpointsinthefree streamandatthenoseoftubeandtakingz=0atth etubecenterline,wegetwhereP0isthestagnat ionpressure, ,weget,and for the speed 2220200 VpVp 2021 Vpp 221V ppV 0221 ppV 02ME304 52 The static PRESSURE corresponds to a point Ais read from the wall static PRESSURE tap.

pressure. Figure. Measurement of stagnation pressure (Pitot tube). In incompressible flow, applying Bernoulli equation between points in the free stream and at the nose of tube and taking z = 0 at the tube centerline, we get where P 0 is the stagnation pressure, the stagnation speed V 0 is zero. where p is the static pressure. The term ...

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