Extended Abstract (552K)J1.2
The MUST Field Experiment: Mean and turbulent wind fields at the upstream edge of a building array
Michael J. Brown, LANL, Los Alamos, NM; and E. R. Pardyjak, D. Zajic, M. Princevac, G. Streit, and C. A. Biltoft
Measurements of the wind and turbulence fields upstream and within the first canyon of a building array are presented. The building array, a 10 x 12 arrangement of shipping containers laid out on a regular aligned grid, was situated in flat terrain at the Dugway Proving Grounds, Utah. Each shipping container was 12.2 m wide, 2.6 m deep, by 2.6 m high. They were aligned with the long face perpendicular to the mean climatological nightly wind coming out of the south-southeast. With 12 m spacing in the longitudinal and 6 m in the lateral, the plan area of the array was 0.13 and the H/S ratio was 0.2, the latter indicative of the isolated roughness flow regime.
The Mock Urban Settings Test (MUST) Experiment took place from Sept. 10-27, 2001. For this paper, we look at data from Sept. 24-25, a night with predominantly south-southeasterly winds nearly perpendicular to the array. Twelve sonic anemometers were placed around a single building near the center of the first row of buildings. One 3m tower with three 3D sonics was placed close to the upstream side of the building. Five 2D sonics were placed in the canyon between the first and second row buildings. Vertical information within the canyon was obtained from four 3D sonics placed on a 5m tower. An upstream profile was obtained using tethersonde measurements and three tower-mounted sonic anemometers. Based on 5 minute average measurements, we investigated the relative strength of the inflow, the jet going over the building top, and the horizontal and vertical recirculations in the canyon.
Joint Session 1, Flow and dispersion studies: building, street canyon (measurement and modeling) (Joint with the Fourth Symp. Urban Environment, 12th Joint Conf. on the Applications of Air Pollution Meteorology with A&WMA, and 25th Conf. Agricultural & Forest Meterology)
Tuesday, 21 May 2002, 8:30 AM-12:15 PM
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