Analysis and interpretation of non-stationary wind flow on a bluff body

Franklin T. Lombardo, Douglas A. Smith

Research output: Contribution to conferencePaperpeer-review


Non-stationary wind and pressure data has long been problematic to the wind engineering community due to its inherent transient characteristics, making it impractical to use traditional correlation and spectral analysis techniques. Due to these constraints, appropriate and meaningful analysis has been rather limited. Inconveniently, some of the more interesting and important wind data from an engineering perspective usually exhibit non-stationary characteristics (e.g., hurricanes, thunderstorms, tornadoes). A number of non-stationary wind and pressure records exist at the Texas Tech Wind Engineering Research Field Laboratory (WERFL) building, mainly due to thunderstorms which frequent the area throughout the spring and summer months. An important aspect of the research is to analyze the characteristics of wind flow and pressure distribution around the WERFL building in strongly non-stationary, or "ramp-up" events where strong changes in wind speed or wind direction or other flow mechanisms such as "ring vortices" from microbursts may significantly alter bluff body flow in a short period of time. Wavelet analysis again has many advantages for this type of local (evolving) information as it can be used for analyzing and quantifying continuous information in the time and frequency domain. Indirect bluff body effects such as vertical angle of attack and vertical wind speed profile will also be identified during thunderstorm/non-stationary events. Angle of attack showed no significant differences while some thunderstorm profiles exhibited impinging jet profile in a "gust" sense.

Original languageEnglish (US)
StatePublished - 2009
Externally publishedYes
Event11th Americas Conference on Wind Engineering - San Juan, Puerto Rico
Duration: Jun 22 2009Jun 26 2009


Other11th Americas Conference on Wind Engineering
Country/TerritoryPuerto Rico
CitySan Juan

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment


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