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Technical Briefs

Adjustment of Aerodynamic-Compensation Characteristics of a Pitot Tube by Rear-Body Shape Manipulation

[+] Author and Article Information
Jehanzeb Masud

Department of Mechanical and Aerospace Engineering, Institute of Avionics and Aeronautics, Air University, Islamabad 44000, Pakistanjehanzeb.masud@mail.au.edu.pk

Farooq bin Akram

School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332

J. Fluids Eng 132(3), 034502 (Mar 18, 2010) (6 pages) doi:10.1115/1.4001156 History: Received June 13, 2009; Revised January 13, 2010; Published March 18, 2010; Online March 18, 2010

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.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Geometric profile of the original Pitot tube

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Figure 2

Layout of the computational domain

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Figure 3

Representative mesh in the vicinity of the Pitot tube

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Figure 4

Subsonic Cp variation near the compensation region of the Pitot tube

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Figure 5

Supersonic Cp variation near the compensation region of the Pitot tube

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Figure 6

Geometry of the proposed AOA interface

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Figure 7

Computed effect of the AOA interface on Cp at the design static pressure port

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Figure 8

Geometry of three proposed rear-body compensation (RC) profiles for a Pitot tube with AOA interface

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Figure 9

Computed effect of the three rear-body compensation profiles on design static pressure port in the subsonic regime

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Figure 10

Effect of the AOA interface and the RC3 profile on Pitot tube surface Cp (subsonic) in the compensation region

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