Measurement of Velocity Fields of Nonstationary Air Vortices by Anemometry Using Particle Images

Mochalov, A. A.; Varaksin, A. N.; Arbekov, A. N.

doi:10.1007/s11018-019-01611-3

Cited by 3 publications

(1 citation statement)

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“…From this point of view, it is advisable to use methods for visualizing oscillatory processes. Thus, a laser visualization method was used, the features of which are described in a number of applications [16][17][18].…”

Section: Visualization Of the Oscillational Processesmentioning

confidence: 99%

Evaluation of the Oscillation Velocity in the Neck of the Helmholtz Resonator in Nonlinear Regimes

2022

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Methods for measuring the acoustic characteristics of orifices have been reviewed. Comparison of three methods for evaluating of oscillation velocity in the neck of the Helmholtz resonator are presented. The first method is measurements in an impedance tube with the two-microphone method, the second is based on measuring the sound pressure in the resonator chamber, and the third is based on direct measurements of bias flow with a Pitot tube. The results of measuring the oscillation velocity in the neck of the Helmholtz resonator are presented, and show that these methods are in good agreement only within linear acoustics, but they lead to different results in nonlinear regimes characterized by high sound pressure levels.

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Section: Visualization Of the Oscillational Processesmentioning

confidence: 99%

Evaluation of the Oscillation Velocity in the Neck of the Helmholtz Resonator in Nonlinear Regimes

2022

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Modern Diagnostics of Aircraft Gas Turbine Engines

Komshin

Pronyakin

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Estimation of efficiency of measurement of digital camera photosensor noise by automatic segmentation of non-uniform target method and the standard EMVA 1288

et al. 2021

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In this paper important task of estimation of digital camera’s noise parameters is considered. Relation of accuracy of data obtained with digital camera and photosensor noise is discussed. Both standard European machine vision association EMVA 1288 and fast automatic segmentation of non-uniform target (ASNT) noise estimation methods are compared. Noise characteristics of machine vision PixeLink PL-B781F, scientific Retiga R6 and amateur mirrorless Canon EOS M100 cameras have been investigated. Accuracy of measurements, speed of calculation and experimental realization has been analyzed. Accuracy of temporal noise estimation by modified ASNT method is no less than that one for standard EMVA 1288. But the ASNT method can be implemented much faster than the standard EMVA 1288 even with additional frames for accuracy improvement.

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Measurement of Velocity Fields of Nonstationary Air Vortices by Anemometry Using Particle Images

Cited by 3 publications

References 1 publication

Evaluation of the Oscillation Velocity in the Neck of the Helmholtz Resonator in Nonlinear Regimes

Evaluation of the Oscillation Velocity in the Neck of the Helmholtz Resonator in Nonlinear Regimes

Modern Diagnostics of Aircraft Gas Turbine Engines

Estimation of efficiency of measurement of digital camera photosensor noise by automatic segmentation of non-uniform target method and the standard EMVA 1288

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