スケールの異なる有孔折板下流の風速分布比較

抄録

This research aims to analyze the reproducibility of wind tunnel tests using windbreak fence models. To achieve the objectives, wind velocity distribution and turbulence intensity distribution measurement in wind tunnel using PIV and hot wire anemometer are carried out with model and prototype of panels respectively. Corrugated perforated panels are adopted as test pieces which are commonly used for windbreak fences in railway in Japan. Scaling ratio is 1/5 and 1/10, but that of panels’ thickness is 5/8. As a result, wind velocity distribution and turbulence intensity behind the 1/5 scaling model and the prototype shows similar tendency. However, the results behind the 1/10 scaling model and the prototype shows different trend. There is a possibility that the results are caused by the “apparent” solidity ratio (taken account of thickness) difference between 1/5 and 1/10, and better reproducibility testing model can be made with consideration of the “apparent” solidity ratio.