Monochromatic flow profile sensor with time division multiplexing and calibration models für fluids

具有时分复用和流体校准模型的单色流量剖面传感器

• 批准号: 326649696
• 负责人: Dr. Lars Büttner
• 金额: --
• 依托单位: Professur für Mess- und Sensorsystemtechnik
• 依托单位国家: 德国
• 项目类别: Research Grants (Transfer Project)
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/326649696?language=en
• 关键词: Monochromatic; flow; profile; sensor; time

Shear layer flows are of outstanding importance in basic research as well as in industrial applications with examples covering the range from turbulence research to aerodynamics or heat flow measurement. For their determination, high spatial resolutions are required in general. Furthermore, reflections from walls can occur at laser-based methods, which might result in systematic measurement errors. The aim of highly spatially resolved flow profile measurements even at large working distances can be achieved by means of the laser Doppler velocity profile sensor, whose properties have been investigated within a research project funded by German Research Foundation. The sensor is based on the utilization of two superposed interference fringe systems distorted by defined wavefront curvature. Using a two-channel measurement, which so far has been generated by means of two laser wavelengths, the position of particles carried with the flow can be determined with micrometer spatial resolution. Measurements in the proximity of walls can be performed using fluorescent scattering particles, however, a sensor employing only one laser wavelength is necessary to this end. Hence, a monochromatic profile sensor based on time division multiplexing is to be investigated and realized until a demonstrator within this transfer project. Beside measurements in wall proximity, one key aspect of this project will be the development of a model for sensor calibration. Since the geometries of the interference fringe systems depends on the refractive index of the surrounding medium, any change of the working fluid would demand a new calibration. Especially in liquids, a calibration based on rotating velocity references is impractical, so that a deep penetration of the market cannot be expected. This problem will be solved by developing a calibration model.

剪切层流动在基础研究和工业应用中具有突出的重要性，其例子涵盖了从湍流研究到空气动力学或热流测量的范围。对于它们的测定，通常需要高的空间分辨率。此外，在基于激光的方法中可能发生来自墙壁的反射，这可能导致系统测量误差。通过激光多普勒速度分布传感器，即使在大的工作距离上也可以实现高空间分辨率的流量分布测量，德国研究基金会资助的一个研究项目对该传感器的特性进行了研究。该传感器是基于利用两个叠加的干涉条纹系统定义的波前曲率失真。使用迄今为止通过两种激光波长产生的双通道测量，可以以微米空间分辨率确定随流携带的颗粒的位置。可以使用荧光散射颗粒来进行壁附近的测量，然而，为此需要仅采用一种激光波长的传感器。因此，基于时分复用的单色轮廓传感器将被研究和实现，直到该转移项目中的演示器。除了测量墙壁附近，该项目的一个关键方面将是传感器校准模型的开发。由于干涉条纹系统的几何形状取决于周围介质的折射率，因此工作流体的任何变化都需要新的校准。特别是在液体中，基于旋转速度基准的校准是不切实际的，因此无法预期市场的深度渗透。这个问题将通过开发校准模型来解决。

项目成果

Investigation and equalisation of the flow distribution in a fuel cell stack

• DOI: 10.1016/j.jpowsour.2019.227546
• 发表时间: 2020-02
• 期刊: Journal of Power Sources
• 影响因子: 9.2
• 作者: F. Bürkle;F. Moyon;L. Feierabend;J. Wartmann;A. Heinzel;J. Czarske;L. Büttner

Measurement and Numerical Simulation of the Velocity Profile in the Thin Film of an Impinging Water Jet

撞击水射流薄膜中速度分布的测量和数值模拟

• DOI: 10.1115/1.4052361
• 发表时间: 2022
• 期刊: Journal of Fluids Engineering
• 作者: M. Joppa;M. Bermuske;F. Rüdiger;L. Büttner;J. Fröhlich;J. Czarske
• 通讯作者: J. Czarske

Flow-measurements in the wake of an oscillating sessile droplet using laser-Doppler velocity profile sensor

• DOI: 10.1515/teme-2021-0119
• 发表时间: 2022-01-29
• 期刊: TM-TECHNISCHES MESSEN
• 影响因子: 1
• 作者: Burgmann, Sebastian;Kraemer, Veronika;Janoske, Uwe
• 通讯作者: Janoske, Uwe

Flow measurements in the wake of an adhering and oscillating droplet using laser-Doppler velocity profile sensor

• DOI: 10.1007/s00348-021-03148-0
• 发表时间: 2021-03-01
• 期刊: EXPERIMENTS IN FLUIDS
• 影响因子: 2.4
• 作者: Burgmann, Sebastian;Dues, Michael;Janoske, Uwe
• 通讯作者: Janoske, Uwe

Simultaneous velocity profile and temperature profile measurements in microfluidics

• DOI: 10.1016/j.flowmeasinst.2021.102106
• 发表时间: 2022-01-08
• 期刊: FLOW MEASUREMENT AND INSTRUMENTATION
• 影响因子: 2.2
• 作者: Burkle, Florian;Czarske, Jurgen;Buettner, Lars
• 通讯作者: Buettner, Lars