Concavity Induced Heat Transfer Enhancement

凹面诱导传热增强

• 批准号: 9700552
• 负责人: Ming King Chyu
• 金额: $ 11万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-08-01 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9700552&HistoricalAwards=false
• 关键词: Concavity; Induced; Heat; Transfer; Enhancement

ABSTRACT The principal investigators propose to study a new technique to enhance convective heat transfer from hot surfaces. Arrays of concave indentations will be created on the surface to induce higher rates of heat transfer. This concept was first mentioned by Russian scientists at an international conference held in 1995. The Russian scientists conjectured that tornado-like bursts resulting from flow over the concavities were responsible for the enhanced heat transfer. Preliminary experimental measurements by the principal investigators did show enhanced heat transfer, but not the presence of tornado-like bursts. The proposed work will include comprehensive experimental measurements using the transient liquid crystal technique to establish the full effects of concavities. Three-dimensional numerical simulations using a finite-volume based computer code will be carried out to reveal the flow behavior.

摘要 主要研究人员建议研究一种新的技术，以加强对流传热从热表面。 将在表面上形成凹进的凹痕阵列，以诱导更高的热传递速率。 这一概念是俄罗斯科学家在1995年举行的一次国际会议上首次提出的。 俄罗斯科学家们证实，由凹部上方的流动引起的龙卷风般的爆发是增强传热的原因。 主要研究人员的初步实验测量确实显示了增强的热传递，但没有出现龙卷风般的爆发。 拟议的工作将包括全面的实验测量使用瞬态液晶技术，以建立凹的全部效果。 将使用基于有限体积的计算机代码进行三维数值模拟，以揭示流动行为。