Seven-hole cone probes for high angle flow measurement Theory and calibration

Everett, K. N.; Gerner, A. A.; Durston, Donald A.

doi:10.2514/3.8188

Cited by 68 publications

(31 citation statements)

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“…These flows therefore provide a good test-case for the assessment of velocity probes. Wake scan data were processed using both the conventional, sector-based seven-hole probe algorithm (1) -(5) and the new generalized algorithm (9). The normalized streamwise vortic-ity ζc/U ∞ was computed from the cross-flow velocity field using local bicubic fitting, and the resulting isovorticity contours are plotted in Figure 5.…”

Section: A Validation Of Generalized Calibration Algorithmmentioning

confidence: 99%

“…For the purposes of this work, the coefficients were in all cases obtained from the calibration data using third-order interpolation (see, for example, [8,9]). Formally, then, f α , f β , f 0 and f s were approximated as piecewise bicubics.…”

Section: B Generalized N-hole Probe Calibration Algorithmmentioning

confidence: 99%

“…The design, calibration and use of five-and seven-hole probes is already well-developed (see, for example [7,8,9,10,11]). In general, the calibration process involves the identification of nondimensional pressure coefficients which are as sensitive as possible to the flow angularity but are insensitive to the velocity magnitude.…”

Section: Introductionmentioning

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%

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Calibration and Use of n-Hole Velocity Probes

2015

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Section: A Validation Of Generalized Calibration Algorithmmentioning

confidence: 99%

Section: B Generalized N-hole Probe Calibration Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Calibration and Use of n-Hole Velocity Probes

2015

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“…Each hole is a pressure tap connected to a measuring device. More details about the geometry and construction process can be found in Everett et al [8] and Gerner et al [9] (Fig. 1).…”

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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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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Advanced pneumatic method for gradient flow analysis

Glahn

Hallmann

Jeckel

et al. 1993

Experiments in Fluids

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Pneumatic 5-hole probes are widely known reliable sen-!~ ko/(rfis) sors for the analysis of three-dimensional flow fields. Since the v m2/s accuracy of such measurements depends strongly on the volume of p ky/m 3 the probe and the gradients in the flow, a miniature spherical ~b o five-hole-probe with an improved analysis method was developed. With the new method, the complete physically reasonable angle measurement range can be used now by introducing modified calibration functions. A dimensionless examination of the flow around Subscripts spheres shows the independence of the calibration functions within abs a wide range of flow velocities. Misrepresentations in flows with high meas gradients caused by the volume of the probe are estimated by ref a geometry based correction method. The quality of the method is st analysed by an extensive error calculation. Results of measurements s in a three-dimensional model combustor are discussed. dynamic viscosity kinematic viscosity = #/p density separation angle * depends on quantity absolute measured reference static surrounding List of symbols Ap m 2 a m/s c m/s C o --Dm dm Kp, iKo, K~ -km M m X * n p N/m 2 q N/m 2 R J/(koK ) Rer, O, z m S X *

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Seven-hole cone probes for high angle flow measurement Theory and calibration

Cited by 68 publications

References 1 publication

Calibration and Use of n-Hole Velocity Probes

Calibration and Use of n-Hole Velocity Probes

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

Advanced pneumatic method for gradient flow analysis

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