Heat Transfer During Thermal Acoustic Oscillations in Cryogenic Systems

低温系统中热声振荡期间的传热

• 批准号: 9115040
• 负责人: Klaus Timmerhaus
• 金额: $ 5.99万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-01 至 1995-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115040&HistoricalAwards=false
• 关键词: Heat; Transfer; During; Thermal; Acoustic

Thermal acoustic oscillations in tubes inserted into cryogenic systems can often introduce large quantities of heat into these systems. Such unwanted heat leaks can seriously degrade long term storage of cryogenic fluids. Very little has been done to develop a theoretical analysis of the heat transfer process during these oscillations. The objective of the proposed research is to numerically analyze and stimulate thermal acoustic oscillations in cryogenic systems, particularly in liquid helium and hydrogen systems, predict the oscillation pressure amplitude, velocity and temperature profiles and finally, experimentally correlate the heat transfer associated with these oscillations.

插入低温系统的管中的热声振荡通常会将大量热量引入这些系统。 这种不希望的热泄漏会严重降低低温流体的长期储存性能。 对这些振荡期间的传热过程进行理论分析的研究还很少。 拟议研究的目的是对低温系统（特别是液氦和氢系统）中的热声振荡进行数值分析和刺激，预测振荡压力幅度、速度和温度分布，最后通过实验关联与这些振荡相关的传热。