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首页> 外文期刊>IEEE Transactions on Aerospace and Electronic Systems >A long-range laser velocimeter
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A long-range laser velocimeter

机译：远程激光测速仪

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摘要

A long-range laser velocimeter (LV) developed for remote operation from within the flow fields of large wind tunnels is described. Emphasis is placed on improvements in optical hardware as well as additions to data acquisition and processing techniques. The method used for data reduction of photon resolved signals is outlined in detail, and measurement accuracy is discussed. To study the performance of the LV and verify the measurement accuracy, laboratory measurements were made in the flow field of a 10-cm-diameter, 30-m/s axisymmetric jet. The measured velocity and turbulence intensity surveys are compared with measurements made with a hot-wire anemometer. Additionally, the LV was used during the flow calibration of the 80-ft*120-ft wind tunnel to measure the test-section boundary layer thickness at the maximum wind tunnel speed of 51.5 m/s. The requirements and techniques used to seed the flow are discussed, and boundary-layer surveys of mean velocity and turbulence intensity of the streamwise component and the component normal to the surface are presented. The streamwise component of mean velocity is compared with data obtained with a total pressure rake.
机译：描述了一种为大型风洞流场内的远程操作而开发的远程激光测速仪（LV）。重点放在光学硬件的改进以及数据采集和处理技术的增加上。详细概述了用于光子分辨信号数据缩减的方法，并讨论了测量精度。为了研究LV的性能并验证测量精度，在直径为10 cm，30 m / s的轴对称射流的流场中进行了实验室测量。将测得的速度和湍流强度测量结果与热线风速计的测量结果进行比较。此外，在80英尺* 120英尺风洞的流量校准期间，使用了LV来在最大风洞速度为51.5 m / s的情况下测量测试截面边界层的厚度。讨论了用于播种流的要求和技术，并给出了沿流方向的分量和垂直于表面的分量的平均速度和湍流强度的边界层调查。将平均速度的沿河方向的分量与通过总压耙获得的数据进行比较。

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