Cascade nonlinear feedforward-feedback control of stagnation pressure in a supersonic blowdown wind tunnel

Ilić, Biljana; Miloš, Marko; Isaković, Jovan

doi:10.1016/j.measurement.2016.10.046

Cited by 7 publications

(4 citation statements)

References 26 publications

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“…This section is devoted to explain how to quantify the uncertainty of the quadratic regression between air dynamic pressure and anemometer rotation frequency (Equation (7)). Authors such as Ilic et al [28], who measure stagnation pressure inside wind tunnel, point out the high nonlinearity of the measurement process of dynamic pressure.…”

Section: Methodsmentioning

confidence: 99%

Alternative Calibration of Cup Anemometers: A Way to Reduce the Uncertainty of Wind Power Density Estimation

Guerrero-Villar¹,

Dorado-Vicente²,

Medina-Sánchez³

et al. 2019

Sensors

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This study presents a procedure to reduce the uncertainty of wind power density estimations, which is useful to improve the energy production predictions of wind farms. Power density is usually determined from the wind speed measured by a cup anemometer and the air density value (conventional procedure). An alternative procedure based on wind speed and dynamic pressure estimations provided by a cup anemometer is proposed. The dynamic pressure is obtained by means of a calibration curve that relates the anemometer rotation frequency and the dynamic pressure measured by a Pitot tube. The quadratic regression, used to define the calibration curve, and its uncertainty are both detailed. A comparison between the alternative procedure and the conventional one points out the advantage of the proposed alternative since results show a high reduction of the indirect measurement uncertainty of wind power density.

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Section: Methodsmentioning

confidence: 99%

Alternative Calibration of Cup Anemometers: A Way to Reduce the Uncertainty of Wind Power Density Estimation

Guerrero-Villar¹,

Dorado-Vicente²,

Medina-Sánchez³

et al. 2019

Sensors

View full text Add to dashboard Cite

show abstract

“…Stagnation pressure in the test section of the wind tunnel can be between 1.1 and 15 bar, the operating envelope depending on Mach number, and resulting in Reynolds numbers of up to 110 million per meter. Stagnation pressure is regulated to within 0.1% of the nominal value [46]. Run time can be up to approximately 60 s, depending on test conditions.…”

Section: The Vti T-38 Wind Tunnelmentioning

confidence: 99%

“…Aerospace 2021, 8, 275 5 of 21 nominal value [46]. Run time can be up to approximately 60 s, depending on test conditions.…”

Section: The Vti T-35 Wind Tunnelmentioning

confidence: 99%

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Wind Tunnel Testing of ONERA-M, AGARD-B and HB-2 Standard Models at Off-Design Conditions

et al. 2021

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Published results for standard wind tunnel models at non-standard test conditions are quite rare and/or may not be available. It has been found that those results are a useful aid in preparations for a number of wind tunnel tests in the Military Technical Institute (VTI) in Belgrade. Test campaigns of standard models at non-standard conditions are performed to serve as an internal database for future wind tunnel tests in such environments. Those tests, that partially overlap the referenced Mach number and/or angle of attack ranges, are conducted in different VTI’s test facilities; different model sizes and support stings were used. The standard models used in static measurements in VTI, ranging from simple missile shapes and re-entry bodies to complicated airplanes, are briefly described and sample non-standard test results are given. The correlation of the test results among models and facilities has been done with references in the available ranges, and, after confirming a good agreement, it is assumed that the results are also valid in the extended ranges of conditions. These results may be useful for researchers in other wind tunnel facilities and for those who handle CFD tools.

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Wind Tunnel Operation and Testing in the Twenty-First Century: The Case of VTI’s Test Facilities

Ilić

2023

Sustainable Aviation

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Cascade nonlinear feedforward-feedback control of stagnation pressure in a supersonic blowdown wind tunnel

Cited by 7 publications

References 26 publications

Alternative Calibration of Cup Anemometers: A Way to Reduce the Uncertainty of Wind Power Density Estimation

Alternative Calibration of Cup Anemometers: A Way to Reduce the Uncertainty of Wind Power Density Estimation

Wind Tunnel Testing of ONERA-M, AGARD-B and HB-2 Standard Models at Off-Design Conditions

Wind Tunnel Operation and Testing in the Twenty-First Century: The Case of VTI’s Test Facilities

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