A comparative study of field measurements of the turbulence characteristics of typhoon and hurricane winds

Li, Lixiao; Kareem, Ahsan; Xiao, Yingying; Song, Lili; Zhou, Chao

doi:10.1016/j.jweia.2014.12.008

Cited by 69 publications

(32 citation statements)

References 69 publications

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“…The estimated surface roughness ( z 0 ) varies in the range of 0.2–7 mm, which is in good agreement with the representative values of z 0 (0.2–5 mm) for sea terrain as recommended by Wieringa . Furthermore, the estimated surface roughness compares favorably to the values reported by Yu and Chowdhury and Li et al, which are z 0 = 0.2–7 mm and z 0 = 0–5 mm, respectively.…”

Section: Wind Profiles and Turbulence Parameterssupporting

confidence: 87%

“…Figure also shows comparisons of the measurements of turbulence intensity with those reported by Yu and Chowdhury and Li et al for sea terrain. On the basis of the FCMP datasets, Yu and Chowdhury suggested the mean longitudinal and lateral turbulence intensities of 0.113 and 0.1 at 10‐m height for z 0 = 0.2–1 mm, respectively, whereas the mean longitudinal turbulence intensity was 0.126 at 5‐m height.…”

Section: Wind Profiles and Turbulence Parametersmentioning

confidence: 65%

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Monitoring of wind pressures on gable roof of a low‐rise building during tropical cyclones and comparisons with wind tunnel test results

2019

Struct Control Health Monit

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A field monitoring program on an experimental low-rise building with gable roof has been established and implemented at a typhoon-prone area in China. This paper presents the field measurements obtained during two tropical cyclones in 2009. The characteristics of near-ground winds during the tropical cyclones are reported and discussed, including wind velocity spectra and profiles of mean wind speed, turbulence intensity, and turbulence integral length scale. This paper focuses on analysis of the external surface pressures measured on the central cross section of the gable roof for winds normal to the ridgeline. Pressure coefficients, probability density functions, and power spectra of the measured wind pressures are analyzed in detail. In addition, wind tunnel experiment of pressure measurements on a 1:50-scaled model of the experimental building is conducted. Comparison of the field measurements and the model test results is then performed. The paper aims to provide reliable fullscale measurements for further understanding of wind pressures on the roof of a typical low-rise building during tropical cyclones and as benchmarks for comparisons with wind tunnel experimental and numerical simulation results.

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Section: Wind Profiles and Turbulence Parameterssupporting

confidence: 87%

Section: Wind Profiles and Turbulence Parametersmentioning

confidence: 65%

Monitoring of wind pressures on gable roof of a low‐rise building during tropical cyclones and comparisons with wind tunnel test results

2019

Struct Control Health Monit

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“…The profiles of wind velocity and turbulence level at the inlet were represented by exponential rates. In Figure , a comparison between the simulation values, theoretical values, and some measured values of average wind velocity and turbulence level profile at the atmospheric boundary layer is given. The fluctuating wind spectrum generated from numerical simulation was fitted and compared with Davenport spectrum, Harris spectrum, Karman spectrum, and measured spectrum, which are as shown in Figure .…”

Section: Numerical Simulation Of Mean Wind Loadmentioning

confidence: 99%

Wind‐induced internal pressure effect within a novel super‐large cylindrical–conical steel cooling tower

2018

Structural Design Tall Build

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Summary A cylindrical–conical steel cooling tower (SCT) is a new type of very large thin‐walled, flexible structure. This study focused on the wind loads on the internal and outer surfaces of this structure and its wind‐induced responses. First, using the computational fluid dynamics method, the numerical wind tunnel was conducted to simulate a 189‐m‐high cylindrical–conical SCT, Asia's highest cooling tower that is still under construction. This numerical method was validated by comparing the wind pressures across typical cross sections of the tower model's cylindrical and conical segments with known standard curves. Based on this, the features of the airflow around the typical cross sections and its wake were extracted, and the distribution of mean wind loads along the internal and outer surfaces of the cylindrical and conical sections was obtained. Then functions for estimating the internal and outer surfaces shape factors of the cylindrical and conical segments were obtained by fitting to the simulated data. Furthermore, finite element method was used to analyze the static wind‐induced response of the cylindrical–conical SCT under internal pressure, external pressure, or both internal and external pressure. The effect patterns of internal pressures on the wind‐induced responses of the main tube, stiffening trusses, and auxiliary trusses of the tower were derived from the analysis results. Main findings of the research can provide a reference for design of very large cylindrical–conical SCTs for wind resistance in the future.

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“…They differ from ordinary strong winds and hurricanes by their more intensive rotation and their convergent airflows, extreme wind speeds and turbulence intensities, ascending and sinking airflows, sharp changes in the wind direction, etc. [5,6]. Since most high-power offshore WTs were designed and produced in the US or Europe in compliance with standards for extratropical conditions, their operation under tropical typhoon conditions is subjected to a high risk of WT tower collapse and blade fracture, notwithstanding the shutdown/emergency stop measures.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Aeroelastic Response of Wind Turbines in Typhoons Based on the Mesoscale WRF Model

et al. 2019

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A new simulation method for the aeroelastic response of wind turbines under typhoons is proposed. The mesoscale Weather Research and Forecasting (WRF) model was used to simulate a typhoon's average wind speed field. The measured power spectrum and inverse Fourier transform method were coupled to simulate the pulsating wind speed field. Based on the modal method and beam theory, the wind turbine model was constructed, and the GH-BLADED commercial software package was used to calculate the aerodynamic load and aeroelastic response. The proposed method was applied to assess aeroelastic response characteristics of a commercial 6 MW offshore wind turbine under different wind speeds and direction variation patterns for the case study of typhoon Hagupit (2008), with a maximal wind speed of 230 km/h. The simulation results show that the typhoon's average wind speed field and turbulence characteristics simulated by the proposed method are in good agreement with the measured values: Their difference in the main flow direction is only 1.7%. The scope of the wind turbine blade in the typhoon is significantly larger than under normal wind, while that under normal operation is higher than that under shutdown, even at low wind speeds. In addition, an abrupt change in wind direction has a significant impact on wind turbine response characteristics. Under normal operation, a sharp variation of the wind direction by 90 degrees in 6 s increases the wind turbine (WT) vibration scope by 27.9% in comparison with the case of permanent wind direction. In particular, the maximum deflection of the wind tower tip in the incoming flow direction reaches 28.4 m, which significantly exceeds the design standard safety threshold.

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A comparative study of field measurements of the turbulence characteristics of typhoon and hurricane winds

Cited by 69 publications

References 69 publications

Monitoring of wind pressures on gable roof of a low‐rise building during tropical cyclones and comparisons with wind tunnel test results

Monitoring of wind pressures on gable roof of a low‐rise building during tropical cyclones and comparisons with wind tunnel test results

Wind‐induced internal pressure effect within a novel super‐large cylindrical–conical steel cooling tower

Numerical Simulation of the Aeroelastic Response of Wind Turbines in Typhoons Based on the Mesoscale WRF Model

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