[tangyao1208]

Abstract
Paper uses momentum equation and flux conservation to deal with the dynamic pressure of Pitot tube in ideal fluid media and draws the conclusion that significant steady flow is hardly set up in ideal fluid media.
Further more paper deduces that pressure measured of Pitot tube may divide into three stages by flowing condition and explains the reason of high speed water drawing air from opposite opinion.
Key words: ideal fluid media, dynamic pressure, Bernoulli’s equation

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