PRELIMINARY STUDY ON WIND PRESSURE MEASUREMENT ON SOLID WAVY BED WITH PRESSURE SENSITIVE PAINT

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  • 連続固定波面上の風圧の感圧塗料計測の試み

Abstract

<p> To understand transportation mechanisms of materials through an ocean surface by wind, a preliminary study is conducted on a spaciotemporal wind pressure measurement on a continuous solid wavy bed by means of the pressure sensitive paint (PSP). The PSP measurement technology is close to an application stage in the field of aero-fluid-dynamics. However, the wind speed acting on the ocean surface and civil engineering structures is not high enough to apply the PSP measurement. For example, the pressure drop is only 0.54 % for a wind speed of 30 m/s. Therefore, temporal and spatial data accumulation methods are applied, such as binning of intensity data from neighboring pixels, and accumulation of data for repetitive captures of the images. The PSP luminescence intensity is sensitive to temperature changes caused by wind and illumination to the PSP. Therefore, it is necessary to accurately measure the temperature change at the same time to correct the pressure estimated from the intensity or the decay constant of the PSP luminescence.</p>

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