Experimental Study on Aerodynamic Noise Generated from Two-Dimensional Models. 2nd Report. Effect of the Angle of Inclination of Circular Cylinders and the Angle of Attack of Square Cylinders to Aerodynamic Noise.

彰二, 山田; 肇, 藤田; 芳幸, 丸田; 浩幸, 槇; 純一, 白石

doi:10.1299/kikaib.63.1974

Cited by 9 publications

(11 citation statements)

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“…However, the results of King and Barsikow [21] are closer to the trend obtained using γ = 6. The results are also compared with those obtained by Yamada et al [19] and Haramoto et al [20] for an inclined circular cylinder after being corrected by cylinder length by applying Eq. According to the independence principle the SPL should reduce more rapidly for higher yaw angles.…”

Section: Circular Cylindermentioning

confidence: 80%

“…For the circular cylinder, Figure 7 The results in Figure 7(a) are compared with those obtained by Yamada et al [19], by King and Barsikow [21] and by Haramoto et al [20] who measured the vortex shedding noise from circular cylinders for a similar Reynolds number range as that covered in the present investigations (see Table A.1 and Table A The reason that the present results are lower than those found in the literature could be that the aspect ratio L/D used in the current experiments is not high enough to allow the end effects to be neglected. Gowda found that the threedimensional flow produced by the cylinder free ends affected the Strouhal number of the vortex shedding produced by a circular cylinder in an air flow [33].…”

Section: Circular Cylindermentioning

confidence: 87%

“…Symmetry was assumed in terms of rotating the square cylinder in the upstream (negative angles of attack) or downstream (positive angles of attack) direction, in accordance with the results shown by Yamada and Fujita [19]. Figure 3 shows the experimental set-up used.…”

Section: Experimental Set-upmentioning

confidence: 99%

“…This effect has not been taken into account in the present work but it is not expected to be significant. For instance, applying the near-field term proposed by Fujita [19] to the largest wavelength of the vortex shedding peak noise (see Table A.3), which is the most unfavourable case, the correction obtained is 1.6 dB.…”

Section: Compact Source and Far Field Conditionsmentioning

confidence: 99%

“…Yamada et al [19] Other experimental results are available in the literature in terms of fluctuating lift coefficient. The effect on noise can be estimated by assuming that the corresponding decrease of the SPL can be calculated from Eq.…”

Section: Dependence On the Angle Of Attack For Square Cylindersmentioning

confidence: 99%

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Experimental study of the aerodynamic noise radiated by cylinders with different cross-sections and yaw angles

Iglesias

Thompson

Smith

2016

Journal of Sound and Vibration

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Vortex shedding from cylinders has been extensively studied due to its occurrence in many engineering fields. Many experimental studies reported in the literature focus on the aerodynamics of the vortex shedding process but the literature about the radiated noise is more scarce. The aim of the work presented here is to extend the available noise data. Aero-acoustic wind tunnel tests were carried out using cylinders with different cross-sections: circular, square, rectangular and elliptical. Flow speeds between 20 and 50 m/s were used, corresponding to Reynolds numbers in the range from 1.6 × 10 4 to 1.2 × 10 5 . The dependence of the noise on the yaw angle, flow speed, cross-sectional shape, angle of attack and radiation angle (directivity) is assessed. The results obtained are compared, where possible, with those found in the literature for similar cases. It is intended that the results can be used for the validation and calibration of numerical and empirical aerodynamic noise prediction models.

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Section: Circular Cylindermentioning

confidence: 80%

Section: Circular Cylindermentioning

confidence: 87%

Section: Experimental Set-upmentioning

confidence: 99%

Section: Compact Source and Far Field Conditionsmentioning

confidence: 99%

Section: Dependence On the Angle Of Attack For Square Cylindersmentioning

confidence: 99%

See 3 more Smart Citations

Experimental study of the aerodynamic noise radiated by cylinders with different cross-sections and yaw angles

Iglesias

Thompson

Smith

2016

Journal of Sound and Vibration

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Feasibility of eolian sound for urban wind speed estimation

Yoshikawa,

Nishijima,

Okaze

et al. 2023

Japan Architectural Review

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Wind‐speed measurement is crucial in designing wind‐resistant buildings and controlling the wind environment in urban areas. However, the current methods of measuring wind speed, such as anemometers and Doppler lidar, are associated with high costs. This study investigated an alternative approach to measuring wind speed using the eolian sound emitted from cylindrical objects in urban settings, such as electrical cables. The proposed method relies on a relationship between the frequency of Karman vortex generation, which gives rise to eolian sound, and wind speed, considering the diameter of a cylindrical object. This study addressed 2 research questions: (1) the possibility of capturing and identifying the eolian sound emitted from a cylindrical object using a generic recording device and whether the peak frequency of the recorded sound aligns with the theoretically predicted frequency; (2) the feasibility of estimating the direction of the eolian sound source to identify the object responsible for the sound emission. The authors conducted a series of experiments involving artificially generated eolian sound in an outdoor environment and analyzed the recorded sound signals. The analysis results were encouraging, confirming positive responses to both research questions. These results indicate the potential for a novel method capable of estimating wind speed.

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Prediction of Aeolian Tone Radiated from a Tapered Circular Cylinder and Vortex Sound in Wake

Watanabe

Suzuki

2018

Fluid-Structure-Sound Interactions and Control

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Experimental Study on Aerodynamic Noise Generated from Two-Dimensional Models. 2nd Report. Effect of the Angle of Inclination of Circular Cylinders and the Angle of Attack of Square Cylinders to Aerodynamic Noise.

Cited by 9 publications

References 0 publications

Experimental study of the aerodynamic noise radiated by cylinders with different cross-sections and yaw angles

Experimental study of the aerodynamic noise radiated by cylinders with different cross-sections and yaw angles

Feasibility of eolian sound for urban wind speed estimation

Prediction of Aeolian Tone Radiated from a Tapered Circular Cylinder and Vortex Sound in Wake

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