Electromagnetic flowmeter for transient measurements in hydraulic turbines at model scale

本提案旨在更新我们水轮机试验台的流量计，以便在瞬态运行期间对水轮机模型进行时间分辨率的流量测量。拉瓦尔大学的液压机实验室（LAMH）测试台是目前在加拿大运行的唯一一个符合国际电工委员会标准的水轮机测试台。然而，我们目前的流量计的采集频率约为0.5 Hz，不适合评估瞬态条件下的流量，例如启动和负载拒绝，发生在1到10秒内。因此，我们建议将其替换为Endress+Hauser程序55S4H， DN400电磁流量计。该流量计是一种高精度的插入式替代品，采集频率高达100 Hz，根据我们的需求量身定制。LAMH研究项目旨在提高水力涡轮机的操作灵活性和使用寿命，以促进间歇性可再生能源在电网上的整合。这种新型流量计将使LAMH能够完成研究项目，研究瞬态状态下的流体-结构相互作用，如启动和负载拒绝。它将为短期内完成Tr-FRANCIS项目提供必要的数据。Tr-FRANCIS是一个为期六年的项目，由NSERC （CRD资助）、InnovÉE资助机构、五个工业合作伙伴和三个能源供应商支持。它包括5名教授，3名研究助理，20名研究生（2名博士后，4名博士，14名硕士）和许多本科生实习生。Tr-FRANCIS的核心是对涡轮模型进行速度、压力、应变和振动测量，该模型在水动力学和结构上与hydro - quamesbec操作的涡轮相似。这种新的流量计将增加重要的信息，以确定在启动期间涡轮不同位置确定的流动和结构现象之间的相关性。它还将为数值模拟和降阶模型的发展提供数据。

This proposal aims to update the flowmeter of our hydraulic turbine test stand to perform time-resolved discharge measurements in hydraulic turbine models during transient operations. The Hydraulic Machines Laboratory (LAMH) test stand in Université Laval is currently the only hydraulic turbine test stand operating in Canada and respecting the International Electrotechnical Commission standards. However, our current flowmeter has an acquisition frequency of about 0.5 Hz, which is unsuited for evaluating the discharge in transient conditions, such as start-up and load rejections, occurring over 1 to 10 seconds. We thus propose to replace it with an Endress+Hauser Promag 55S4H, DN400 electromagnetic flowmeter. This flowmeter is a high-precision drop-in replacement with an acquisition frequency of up to 100 Hz, tailored to our needs. The LAMH research program aims at increasing the operational flexibility and service life of hydraulic turbines to, among other things, facilitate the integration of intermittent renewable energy on electrical grids. This new flowmeter will enable the LAMH to complete research projects investigating fluid-structure interactions in transient regimes such as start-up and load rejections. It will provide the necessary data to complete the Tr-FRANCIS project in the short term. Tr-FRANCIS is a six-year project supported by NSERC (CRD grant), the InnovÉE grant agency, five industrial partners and three energy suppliers. It involves five professors, three research associates, twenty graduate students (two postdocs, four Ph.D., fourteen M.Sc.) and many undergraduate interns. At the core of Tr-FRANCIS are velocity, pressure, strain and vibration measurements performed on a turbine model hydrodynamically and structurally homologous to a turbine operated by Hydro-Québec. This new flowmeter will add important information to identify correlations between flow and structural phenomena identified at different locations in the turbine during start-ups. It will also provide data for numerical simulations and the development of Reduced Order Models.