Flow-sound interaction of multiple bare and finned cylinders in cross-flow

横流中多个裸露和翅片圆柱体的流声相互作用

• 批准号: 386711-2011
• 负责人: Mohany, Atef
• 金额: $ 1.68万
• 依托单位: University of Ontario Institute of Technology
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=573017
• 关键词: Flow; sound; interaction; multiple; bare

In many engineering applications where ducts containing clusters of bluff bodies are encountered, such as tube bundles of heat exchangers and boilers, cascades of compressor blades and guide/turning vanes in ducts and radial diffusers, unfortunate operating conditions could lead to flow-excited acoustic resonance. When acoustic resonance materialize in heat exchanger tube bundles, the generation of acute noise and/or excessive vibration of the tubes could occur. This will often lead to extensive damage and/or complete failure of heat exchangers. Since this phenomenon is not yet fully understood, it can be dangerously unpredictable. The purpose of the proposed research is to improve our fundamental understanding of the flow-sound interaction mechanisms for the case of multiple bare and finned circular cylinders in cross-flow and to extend this knowledge to the more complex case of a full tube array. The findings of the proposed research will be directly applicable to heat exchanger tube bundles. It is believed that the findings of this research will provide a step forward in developing reliable design guidelines to predict, control and avoid the occurrence of acoustic resonance in heat exchanger tube bundles. Such guidelines are currently not available in the literature. Increasing the safety and reliability of such equipment will directly benefit the Canadian economy.

在许多工程应用中，如换热器和锅炉的管束、压气机叶片的叶栅以及管道和径向扩散器中的导向/转动叶片等，不利的运行条件可能会导致流动激励的声学共振。当换热器管束发生声学共振时，可能会产生剧烈噪声和/或管子过度振动。这通常会导致热交换器的广泛损坏和/或完全失效。由于这一现象尚未被完全理解，它可能是危险的不可预测的。 这项研究的目的是加深我们对横流中多个裸露和翅片圆柱的流动-声相互作用机理的基本理解，并将这一知识推广到更复杂的全管阵列的情况。建议的研究结果将直接适用于换热器管束。相信这项研究的结果将在制定可靠的设计指南方面向前迈进一步，以预测、控制和避免换热器管束中发生声谐振的发生。这样的指南目前在文献中是不可用的。提高此类设备的安全性和可靠性将直接惠及加拿大经济。