Full-Field Laser Vibrometry for Combustion Diagnostics

用于燃烧诊断的全场激光测振法

• 批准号: 282277522
• 负责人: Professor Dr.-Ing. Jürgen W. Czarske
• 金额: --
• 依托单位: Bremer Institut für Messtechnik, Automatisierung und Qualitätswissenschaft (BIMAQ)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/282277522?language=en
• 关键词: Full; Field; Laser; Vibrometry; Combustion

State-of-the art technology in industrial gas turbines for power generation uses lean premixed combustion for high combustion efficiency and low emissions. High power densities and lean combustion increase the susceptibility to thermoacoustic oscillations. Modelling and prediction of instabilities is often accomplished by analysing the flame transfer function (FTF), which relates the unsteady heat release rate from the flame to perturbations of incoming velocity as function of frequency. Such characterization of flames is also necessary for turbomachinery in aero-engines. Since research in the field of turbomachinery always is energy related research, a strong impact on society is given. In previous projects of TU Graz (J. Woisetschläger) funded by the Austrian Science Fund FWF it was shown that so-called laser-vibrometers - interferometers used in engineering for surface vibration detection - can directly record density and heat release fluctuations. It also turned out that two laser vibrometers can detect flow velocities in flames by correlating density fluctuations. Heat release and velocity are both needed for FTF recordings. Inspired by modulation and demodulation techniques from communications engineering, projects at TU Dresden (J. Czarske, A. Fischer) funded by the German Research Foundation DFG proofed the concept of another laser-optical measurement using sinusoidal laser frequency modulation technique - also inherent to laser vibrometer technology - in combination with modern highspeed sensor arrays and spatio-temporal correlation techniques for fluid flow investigations. The hypothesis of this project is that laser vibrometer technology can be combined with modern high-speed camera sensors, so that such a proposed full-field interferometry based on numerous laser vibrometers (each pixel one vibrometer) can record FTF, and also provides field information on heat release rate and velocity as well as spatio-temporal correlations within the flame - all without the need for tracer particles or tracers and all novel to combustion diagnostics. In this project the expertise of both TU Graz and TU Dresden will be combined to verify this hypothesis and develop a full-field laser vibrometer for laseroptical high-speed combustion diagnostics, starting from the thermo-acoustics needed to characterize the flame, including appropriate spatial/temporal correlations for single and dual directional observations. This project includes a benchmarking with single line-of-sight laservibrometers (TU Graz) and high-speed velocity recordings (TU Dresden). Additional to the two main project partners TU Graz (J.Woisetschläger) and TU Dresden (J. Czarske, A. Fischer) three research institutes known for their expertise in turbomachinery combustion and metrology will participate in the verification and testing process (TU Munich, DLR Cologne, PTB Braunschweig).

发电的工业燃气轮机中最先进的技术使用精益预混合组合来实现高组合效率和低排放。高功率密度和精益组合增加了热声振荡的敏感性。通常通过分析火焰传递函数（FTF）来实现不稳定性的建模和预测，这将不稳定的热释放速率与频率的函数相关联与传入速度的扰动。这种火焰的这种表征对于航空引擎中的涡轮机械也是必需的。由于在涡轮机械领域的研究始终是能量相关的研究，因此对社会产生了强烈的影响。在奥地利科学基金FWF资助的Tu Graz（J.Woisetschläger）的先前项目中，表明所谓的激光复古仪 - 用于表面振动检测的工程中使用的干涉仪 - 可以直接记录密度和热量释放波动。事实证明，两个激光振动可以通过将密度波动相关联在火焰中检测流速度。 FTF记录都需要热量释放和速度。受到通信工程的调节和解码技术的启发，由德国研究基金会资助的Tu Dresden（J. Czarske，A。Fischer）的项目启发了DFG资助的DFG资助，证明了另一种激光光学测量的概念，该概念使用正弦激光频率调制技术 - 还可以与现代化的高速传感器进行启用，并与高速传感器进行了启用，调查。该项目的假设是激光振动仪技术可以与现代的高速摄像头传感器相结合，因此，基于众多激光振动仪（每个像素一个一个振动仪）的建议的全场干扰可以记录FTF，并且还可以在无需释放速率和速度或驾驶范围内的所有新颖型号的情况下提供现场信息。诊断。在这个项目中，将结合使用Tu Graz和Tu Dresden的专业知识来验证这一假设并为激光高速复合诊断提供全场激光振动仪，从需要表征火焰的热声学开始，包括适当的空间/时间相关性，用于单个和多个方向性观察。该项目包括一个基准测试，该基准测试带有单一视线激光仪（TU Graz）和高速速度记录（Tu Dresden）。除两个主要项目合作伙伴Tu Graz（J.Woisetschläger）和Tu Dresden（J. Czarske，A。Fischer）外，三家以其在涡轮机械组合和计量学方面的专业知识而闻名的研究机构将参与验证和测试过程（Tu Munich，dlrrrrogne，dlr cologne，ptb braunscheig）。

项目成果

Comparison of Flame Transfer Functions Measured With Locally Resolved Full-Field-Vibrometry and OH*-Chemiluminescence

使用局部分辨全场测振法和 OH*-化学发光测量的火焰传递函数的比较

• DOI: 10.1115/gt2018-75460
• 发表时间: 2018
• 期刊: Volume 4A: Combustion, Fuels, and Emissions
• 作者: F. Greiffenhagen;J. Woisetschläger;J. Gürtler;H. Scholz;R. Kuschmierz;J. Czarske
• 通讯作者: J. Czarske

High-speed non-intrusive measurements of fuel velocity fields at high-pressure injectors

• DOI: 10.1016/j.optlaseng.2016.10.003
• 发表时间: 2017-03
• 期刊: Optics and Lasers in Engineering
• 影响因子: 4.6
• 作者: Johannes Gürtler;Raimund Schlüßler;A. Fischer;J. Czarske

Quantitative measurement of density fluctuations with a full-field laser interferometric vibrometer

使用全场激光干涉测振仪定量测量密度波动

• DOI: 10.1007/s00348-019-2842-y
• 发表时间: 2020
• 期刊: Experiments in Fluids
• 影响因子: 2.4
• 作者: F. Greiffenhagen;J. Woisetschläger;J. Gürtler;J. Czarske
• 通讯作者: J. Czarske

Simultaneous measurements of velocity and density of transient flows using high-speed camera technique (Conference Presentation)

使用高速摄像技术同时测量瞬态流的速度和密度（会议演示）

• DOI: 10.1117/12.2309528
• 发表时间: 2018
• 作者: J. Gürtler;A. Ramos;J. Woisetschläger;R. Kuschmierz;F. Greiffenhagen J. Czarske
• 通讯作者: F. Greiffenhagen J. Czarske

Discussion of laser interferometric vibrometry for the determination of heat release fluctuations in an unconfined swirl-stabilized flame

激光干涉测振法测定无侧限涡流稳定火焰中放热波动的讨论

• DOI: 10.1016/j.combustflame.2018.12.019
• 发表时间: 2019
• 期刊: Combustion and Flame
• 影响因子: 4.4
• 作者: F. Greiffenhagen;J. Peterleithner;J. Woisetschläger;A. Fischer;J. Gürtler;J. Czarske
• 通讯作者: J. Czarske