In this paper we present a methodology for adjustment of subsonic compensation characteristics of an aerodynamic-compensation Pitot tube. This methodology is based on manipulation of a Pitot tube profile (shape) downstream of the static pressure port such that its subsonic characteristics are modified while the supersonic characteristics remain unchanged. Due to this “rear-body” shape adjustment, complete redesign of a developed or in service Pitot tube is not required. We have used computational fluid dynamics tools in the analysis and design refinement of a Pitot tube by rear-body shape adjustment. The complete Mach number regime (M<2) has been computationally analyzed for three different rear-body profiles. The results of our study indicate that significant variation in subsonic compensation characteristics of a Pitot tube is possible by this method.

Issue Section:
Technical Briefs
Keywords:
Pitot tube, air data, aerodynamic compensation, CFD, aerodynamics, computational fluid dynamics, flow measurement, Mach number, subsonic flow
Topics:
Flowmeters, Design, Mach number, Pressure, Computational fluid dynamics, Shapes
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