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Fluid mechanics and spatial performance of face arrays.

机译:面阵的流体力学和空间性能。

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This report describes the fluid mechanics and aerodynamic performance of the Free Air Carbon dioxide Enrichment (FACE) array tested at Yazoo City, MS, in September 1987. The report describes three fluid mechanical regimes: the near field, dominated by the injection jets; the array itself; and the flow downwind of the array. The distribution of gas inside the array is described by means of multiport CO(sub 2) sampling and perfluorocarbon tracers, at three different heights. For the plant canopy configuration existing at this time, the flow was nearly uniform with height. Although the centerline CO(sub 2) concentration was controlled to well within the design goal, (plus minus)20%, 80% of the time, the variability away from the center was somewhat greater. On average, (plus minus)20% variability was achieved within a 13 m diameter within the 22 m array. The CO(sub 2) concentration downwind of the array was generally down to ambient levels within a distance of 100 m. The dispersion efficiency of the array, as measured by the parameter XAu/Q, compared well with the Brookhaven National Laboratory (BNL) prototype which had been tested on SO(sub 2). The dispersion was greater during the daytime than at night. Although theoretical calculations indicated that CO(sub 2) interference from the Mississippi Chemical Company (MCC) plant was possible, no definite instances of such interference were identified. 6 refs., 40 figs., 1 tab.

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