Tracer-free, non-intrusive, time- and space-resolved temperature and scalar measurements

无示踪剂、非侵入式、时间和空间分辨的温度和标量测量

• 批准号: EP/T030801/1
• 负责人: Simone Hochgreb
• 金额: $ 50.14万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FT030801%2F1
• 关键词: Tracer; free; non; intrusive; time; Tracer; free; non; intrusive; time

The growth in air transport, and the need for base and balance thermal power in an electricity-powered future centres creates a pressing need for low emission, high efficiency gas turbines, particularly regarding NO, CO and soot. The key variables determining the production of these pollutants in the product gases are the local instantaneous product gas temperature and the local fuel fraction. The large fluctuations in gas temperature, and the exponential dependence of pollutant production on temperature means that predictions of NO, CO and soot in combustion are not possible without suitable accurate statistics of instantaneous local temperature measurements. Yet there are very few such measurements in practical devices to validate models. Local instantaneous temperature measurements in high pressure radiant devices require optical techniques which are rather complex for industrial laboratories. This proposal aims to extend a much simpler technique for the purpose to allow tracer free local measurements of temperature, pressure and water vapour. Laser-induced grating spectroscopy (LIGS) has been shown to work even in highly radiant, soot-prone environments, and may also enable local measurements of additional target scalars (water vapour, pressure) using the easily accessible Nd:YAG laser wavelength of 1064 nm. The technique uses both the electrostrictive mode and weak absorption spectral lines in this wavelength range to enable measurements of both temperature and relative water concentrations in realistic devices. The signal to noise of the technique improves with pressure, a significant advantage for realistic devices, especially in environments such as gas turbines, which are prone to large amounts of radiant luminosity. The project will extend the current capabilities of the technique from point measurements to spatially resolved line measurements. Finally, it will extend the pump laser wavelength into near infrared, which will unlock the ability of the technique to use strong absorption lines for a range of widely available species (water, carbon dioxide and hydrocarbons), using industrial lasers at high repetition rates. The final outcome of the project will be the development of an instrument and method for non-intrusive temperature and species measurements in high temperature, high pressure practical reacting flows, requiring only a fraction of the cost of previous techniques of comparable precision. Demonstration measurements will be produced in a high pressure, high temperature, realistic industrial facility. Data produced during these measurements will also allow researchers and developers to review and validate robust reacting flow models for industry and open up the possibilities for optimisation of clean energy conversion devices. The plan for technology transfer is ensured by partnering with a company (Dantec) that has already packaged and commercialised similar instruments. An extension of the validation measurements to other industrial facilities at Rolls-Royce is planned once the instrument development and demonstration has been successfully concluded. Finally, the project will also offer opportunities to PhD students associated with the Energy CDT at Cardiff.

航空运输的增长以及对电力供电的未来中心中基础和平衡热力的需求迫切需要低排放，高效率的燃气轮机，尤其是关于NO，CO和烟灰的需求。确定这些污染物在产品气体中产生的关键变量是局部瞬时产品气体温度和局部燃料分数。气体温度的大波动以及污染物产生对温度的指数依赖性意味着，如果没有适当的瞬时局部温度测量统计数据，则无法预测NO，CO和烟灰的燃烧中的预测。然而，在实用设备中很少有这样的测量来验证模型。高压辐射设备中的局部瞬时温度测量需要光学技术，这对于工业实验室来说是相当复杂的。该建议旨在扩展一种更简单的技术，以实现无示踪剂的温度，压力和水蒸气的局部测量。激光诱导的光谱（LIG）甚至在高度放射线，容易发生的环境中也可以使用，并且还可以使用易于访问的ND：YAG激光波长为1064 nm。该技术在此波长范围内同时使用电扭曲模式和弱吸收光谱线，以实现逼真的设备中温度和相对水浓度的测量。该技术噪声的信号随着压力而改善，这对于逼真的设备来说是一个显着的优势，尤其是在诸如燃气轮机之类的环境中，燃气轮机容易容易出现大量的辐射光度。该项目将将技术的当前功能从点测量扩展到空间分辨的线测量。最后，它将将泵激光波长扩展到近红外，这将使用工业激光器使用工业激光器以高度重复的速率来释放该技术使用强吸收线（水，水，二氧化碳和碳氢化合物）的能力。该项目的最终结果将是在高温，高压实用反应流中的非侵入温度和物种测量的仪器和方法的开发，仅需要可比较精确度的先前技术成本的一小部分。演示测量将在高压，高温，现实的工业设施中生产。在这些测量过程中产生的数据还将使研究人员和开发人员能够审查和验证行业的强大反应流程模型，并为优化清洁能源转换设备的可能性提供了可能性。通过与已经包装和商业化类似工具的公司（DANTEC）合作，可以确保技术转移计划。一旦成功结束了仪器开发和示范，就计划将验证测量范围扩展到劳斯莱斯的其他工业设施。最后，该项目还将为与加的夫能源CDT相关的博士生提供机会。