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首页> 外文期刊>Experiments in Fluids: Experimental Methods and Their Applications to Fluid Flow >Non-contact boundary layer profiler using low-coherence self-referencing velocimetry
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Non-contact boundary layer profiler using low-coherence self-referencing velocimetry

机译：使用低相干自参考测速仪的非接触式边界层轮廓仪

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摘要

A spatially self-referencing velocimetry system based on low-coherence interferometry has been developed. The measurement technique is contactless and relies on the interference between back-reflected light from an arbitrary reference surface and seeding particles in the flow. The measurement location and the flow velocity are measured relative to the reference surface's location and velocity, respectively. Scanning of the measurement location along the beam direction does not require mechanical movement of the sensor head. The reference surface (which can move or vibrate relative to the sensor head) can be either an external object or the surface of a body over which measurements are to be performed. The absolute spatial accuracy and the spatial resolution only depend on the coherence length of the light source (tens of microns for a superluminescent diode). The prototype is an all-fiber assembly. An optical fiber of arbitrary length connects the self-contained optical and electronics setup to the sensor head. Proof-of-principle measurements in water (Taylor-Couette flow) and in air (Blasius boundary layer) are reported in this paper.
机译：已经开发了基于低相干干涉法的空间自参考测速系统。测量技术是非接触式的，并且依赖于来自任意参考表面的后向反射光与流中的种子粒子之间的干涉。分别相对于参考表面的位置和速度测量测量位置和流速。沿光束方向扫描测量位置不需要传感器头的机械运动。参考表面（可以相对于传感器头移动或振动）可以是外部对象，也可以是要在其上执行测量的身体表面。绝对空间精度和空间分辨率仅取决于光源的相干长度（对于超发光二极管为数十微米）。原型是全光纤组件。任意长度的光纤将独立的光学和电子设备连接到传感器头。本文报道了在水（泰勒-库埃特流量）和空气（Blasius边界层）中的原理验证测量。

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