Seven-Hole Pressure Probe Calibration Method Utilizing Look-Up Error Tables

Wenger, Christian W.; Devenport, William J.

doi:10.2514/2.794

Cited by 47 publications

(12 citation statements)

References 5 publications

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“…The inaccuracy errors found for angular and magnitude quantities, less than 0.8°and 1.5% respectively, are of the same order as those found by Zilliac [10], with a method based being upon local interpolation through the Akima method, and Wenger and Devenport [12], who use a two-step interpolation method.…”

Section: Resultssupporting

confidence: 65%

“…This technique improved the measurement accuracy, reducing the errors on the determination of the flow angle and velocity magnitude to 1°and 1%, respectively. Another different approach was presented by Wenger and Devenport [12], who used a two-step method for the probe calibration. The probe coefficients remained the same, but the authors applied an initial least-squares curve fitting to the calibration matrices to represent the smooth trend of the surface, followed by a second step consisting of the construction of error tables containing, for each location, the differences between the experimental calibration points and the correspondent points on the fitting surface.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the use of a linear interpolation method in the measurement procedure of a seven-hole pressure probe

Silva

Pereira

Cruz³

2003

Experimental Thermal and Fluid Science

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Calibration and measurement procedures implemented to work with a seven-hole directional pressure probe in the mapping of pressure and velocity wind tunnel flows are reported in this paper. The performances of two different methods used to derive the flow characteristics (direction and magnitude of flow velocity vector and total and dynamic pressure) from the seven pressure values measured by the probe, are comparatively evaluated. The conventional method, based upon the fitting of the calibration directional data with fourth order polynomial functions is compared with a new method where direct linear interpolation is performed over the calibration matrices. Besides the comparison of the two methods, the fundamentals of the working procedure of the probe are briefly explained and an example of the mapping of the flow field around a wing model in a wind tunnel experiment is presented.

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Section: Resultssupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

On the use of a linear interpolation method in the measurement procedure of a seven-hole pressure probe

Silva

Pereira

Cruz³

2003

Experimental Thermal and Fluid Science

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“…Here, the sectorized normalization technique of Wenger & Devenport [12] is adopted. The seven-hole probe calibration process requires the assumption that the flow remains attached only in the immediate vicinity of the hole registering the maximum pressure.…”

Section: A Conventional Seven-hole Probe Calibration Techniquementioning

confidence: 99%

“…The result of the calibration process is typically a set of four calibration functions mapping the nondimensionalized pitch angle, yaw angle, static pressure and total pressure to the pressures measured at the probe ports. These functions are generally either stored in the form of a look-up table (see [12]) or approximated as a polynomial expansion [9,8]. A detailed comparison of these two calibration techniques is provided by Sumner [13].…”

Section: Introductionmentioning

confidence: 99%

Calibration and Use of n-Hole Velocity Probes

2015

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“…A 7-hole yaw probe measurement system 13) with a stem of 6.1 mm in outer diameter and 4.8 mm in inner diameter was used to measure the time-averaged velocity of turbulent flow. Within the stem are seven tubes, each with an internal diameter 1.1 mm.…”

Section: Experimental Facility and Setupmentioning

confidence: 99%

Comprehensive Study on Tip Vortex with Lateral Jet Flow

Yang

Baek

Saito

et al. 2003

Trans. Japan Soc. Aero. S Sci.

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Comprehensive numerical and experimental investigations of tip vortical characteristics were conducted for lateral tip jet flow over a fixed wing as a step to reduce blade vortex interaction noise. The tip vortex of a NACA0012 blade was measured and visualized for the fundamental study of tip vortical flow, and the results were compared with numerical data as a validation of numerical solvers. Three-dimensional compressible Euler/Navier-Stokes codes were used to calculate the effect of jet flow from the tip of an OLS (modified BHT 540) fixed blade at various freestream velocities and jet conditions. The results show that the jet flowing from the wing tip can diffuse the tip vortex enlarging the core size of tip vortex and weakening its strength. When applied to the blade vortex interaction phenomena, this enlarged and weak vortex can produce a lower pressure gradient on the blade surface, which means that the jet flow can effectively reduce blade vortex interaction noise.

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Seven-Hole Pressure Probe Calibration Method Utilizing Look-Up Error Tables

Cited by 47 publications

References 5 publications

On the use of a linear interpolation method in the measurement procedure of a seven-hole pressure probe

On the use of a linear interpolation method in the measurement procedure of a seven-hole pressure probe

Calibration and Use of n-Hole Velocity Probes

Comprehensive Study on Tip Vortex with Lateral Jet Flow

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