Non-Steady Impingement of Submerged Jets: Heat Transfer

浸没射流的非稳态冲击：传热

• 批准号: 9301287
• 负责人: Jamal Yagoobi
• 金额: $ 2.98万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-01 至 1994-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9301287&HistoricalAwards=false
• 关键词: Non; Steady; Impingement; Submerged; Jets

ABSTRACT CTS-9301287 Robert H. Page A new concept to utilize the non-steady impinging jet from a self oscillating nozzle is proposed. Enhancing the surface heat transfer due to a submerged jet impingement is to be studied theoretically and experimentally. The concept centers around the potential of modifying standard in-line jet nozzles such that they become self oscillating and have the ability to force an oscillating boundary layer development on the impingement surface. It is believed that this agitated surface boundary layer occurrence can be exploited to increase the heat transfer from an impinging jet. The Infrared Heat Transfer Jet Impingement Facility (HJIF) at Texas A&M University will be used for the experimental studies of the impingement. The objective will be to obtain a better understanding of this non-steady phenomena in order that it can be applied to this physical situation to improve the heat transfer as well as to gain the necessary enlightenment about self oscillating or resonant flows, such that the knowledge may have future use for additional surface boundary layer interaction conditions involving mass transfer and chemical reactions.

摘要CTS-9301287罗伯特·H·佩奇提出了利用自振喷嘴产生的非定常冲击射流的新概念。本文从理论和实验两个方面对淹没射流冲击强化表面换热进行了研究。这个概念围绕着对标准直列式喷嘴进行改造的可能性，使其成为自激振荡，并具有在撞击表面上强迫振荡边界层发展的能力。可以认为，这种表面边界层的搅动现象可以被用来增加冲击射流的换热。德克萨斯A&M大学的红外热传递射流撞击装置(HJIF)将用于撞击的实验研究。目的是为了更好地了解这种非定常现象，以便将其应用于这种物理情况，以改善传热，并获得关于自振荡或共振流动的必要启示，以便这些知识将来可能用于涉及传质和化学反应的额外表面边界层相互作用条件。