Two-phase flow-induced vibration: fundamental studies

两相流引起的振动：基础研究

• 批准号: 4473-2006
• 负责人: Pettigrew, Michel
• 金额: $ 1.75万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2006
• 资助国家: 加拿大
• 起止时间: 2006-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=333940
• 关键词: Two; phase; flow; induced; vibration

Excessive flow-induced vibration can lead to very costly failures in industrial components such as heat exchangers and nuclear fuels.  For example a single tube failure in a nuclear steam generator would lead to a station shutdown and repairs costing some M$2.  Higher performance and improved reliability can be achieved if components are optimised for vibration with accurate vibration information.  This can lead to improved industrial competitiveness and savings in the order of M$100 per year in Canada alone. A comprehensive research program was initiated in 2000 at École Polytechnique under the BWC/AECL/NSERC Industrial Research Chair of Fluid-Structure Interaction of which the applicant is the Chair Holder. The Chair program covers components such as heat exchangers, nuclear steam generators, piping systems and nuclear fuels; vibration excitation mechanisms such as fluidelastic instability, periodic and random excitation in both axial and cross flow. While the Chair program is aimed at the technology needs of industry it raises many fundamental questions that are very appropriate for investigation under a Discovery Grant. While more than half of process components operate in two-phase flow our knowledge in this area is still very limited.  Thus, the objective of this proposal is to study fundamental aspects of vibration excitation and damping mechanisms in two-phase flows. Fundamental studies are proposed in the following areas: 1) Fluidelastic instability of flexible tubes subjected to internal two-phase flow; 2) Periodic vibration excitation forces in two-phase flows; 3) Vibration damping in two-phase flows.

过度的流体诱发振动可能会导致热交换器和核燃料等工业部件发生代价高昂的故障。例如，核蒸汽发生器中的单管故障将导致核电站关闭和维修，耗资约2 M美元。*如果使用准确的振动信息优化部件以进行振动，则可以实现更高的性能和更高的可靠性。这可以提高工业竞争力，仅在加拿大每年就可以节省约100 M美元。2000年，理工学院在BWC/AECL/NSERC流体-结构相互作用工业研究教席下启动了一项综合研究方案，申请人是该教席持有人。教席计划涵盖热交换器、核蒸汽发生器、管道系统和核燃料等部件；振动激励机制，如流体弹性不稳定性、轴向和横向流动中的周期性和随机激励。虽然教席计划的目标是工业的技术需求，但它提出了许多基本问题，这些问题非常适合根据发现拨款进行调查。虽然超过一半的过程部件在两相流中运行，但我们在这方面的知识仍然非常有限。因此，本方案的目标是研究两相流中振动激励和减振机制的基本方面。在以下几个方面进行了基础性研究：1)内部两相流作用下柔性管流弹性不稳定性；2)两相流周期激振力；3)两相流振动抑制。