Type of Document	Master's Thesis
Author	Tian, Lin
Author's Email Address	ltian@vt.edu
URN	etd-062399-131503
Title	Analysis of Time-Varying Characteristics of Simulated Turbulence in Wind Tunnel
Degree	Master of Science
Department	Engineering Mechanics
Advisory Committee	Advisor Name Title Hajj, Muhammad R. Committee Chair Ragab, Saad A. Committee Member Tieleman, Henry W. Committee Member
Keywords	small-scale turbulence atmospheric turbulence wind loads orthonormal wavelets intermittency
Date of Defense	1999-05-28
Availability	unrestricted
Abstract Eight roughness configurations in Clemson boundary layer wind tunnel are presented. For these configurations, flow parameters such as turbulent intensities, integral length scales, large- and small- scale turbulence, and spectra of velocity components of the wind are obtained and studied to the simulated turbulence. At the same time, new analyzing tools, orthogonal wavelet techniques, are applied to provide additional information in time domain. This makes it possible to study the intermittency event, one important characteristic associated with pressure peak activities in turbulence. Three parameters, scale energy, intermittency factor and intermittency energy are defined. Variation of these quantities as a result of different configuration is discussed. Finally, the corresponding variations in measured pressure peaks in relation with the variations of configuration as well as with the intermittency parameters are investigated. The work here is of important significance for future wind tunnel and field data comparison, and this could help to find the best simulation among all configurations.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access    abs.pdf 4.80 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   ack.pdf 4.65 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   CHAPTER1.pdf 8.38 Kb 00:00:02 00:00:01 00:00:01 < 00:00:01 < 00:00:01   CHAPTER2.pdf 46.74 Kb 00:00:12 00:00:06 00:00:05 00:00:02 < 00:00:01   CHAPTER3.pdf 279.38 Kb 00:01:17 00:00:39 00:00:34 00:00:17 00:00:01   CHAPTER4.pdf 1.82 Mb 00:08:25 00:04:20 00:03:47 00:01:53 00:00:09   CHAPTER5.pdf 34.33 Kb 00:00:09 00:00:04 00:00:04 00:00:02 < 00:00:01   CHAPTER6.pdf 5.24 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   Content.pdf 9.58 Kb 00:00:02 00:00:01 00:00:01 < 00:00:01 < 00:00:01   REF.pdf 6.48 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   TITLE.pdf 2.33 Kb < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   VITA.pdf 4.44 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01

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