Turbulence characteristics from minisodar data |
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| Authors: | K H Underwood and L G Shamanaeva |
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| Institution: | (1) Maritime Research Center, School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore;(2) School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, 639798, Singapore;(3) Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;(4) College of Engineering, Peking University, Beijing, 100871, People’s Republic of China;(5) Present address: School of Civil and Resource Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia; |
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| Abstract: | Vertical profiles of atmospheric turbulence characteristics, including spatial and temporal longitudinal and transverse velocity
structure functions, velocity structure characteristics, and turbulent kinetic energy dissipation rates retrieved from time
series of vertical profiles of the wind velocity vector measured with a minisodar operating at a frequency of 4900 Hz are
presented. It is established that the structure functions first increase with the separation distance between the observation
points and then are saturated; moreover, the longitudinal structure function is much greater than the transverse one, which
is in agreement with the data available from the literature. The velocity structure characteristic is well described by the
z−2/3 altitude dependence predicted theoretically. Calculated values of the turbulent energy dissipation rate are in agreement
with the data available from the literature. |
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