Career: Computations of Aerodynamic Sound Generation in Turbulent Jets

职业生涯：湍流射流中空气动力学声音产生的计算

• 批准号: 9501349
• 负责人: Tim Colonius
• 金额: $ 28.5万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1999-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9501349&HistoricalAwards=false
• 关键词: Career; Computations; Aerodynamic; Sound; Generation

ABSTRACT Tim Colonius CTS-9501349 California Institute of Technology The research component of this CAREER award will theoretically investigate the sound generated by turbulent subsonic jets using first principles. The equations of motion for a three dimensional unsteady flow will be solved numerically. These computations build upon previously developed numerical methods which were used to investigate sound generation in a two-dimensional mixing layer. These techniques will be applied to the turbulent jet, which is a prototype problem for turbulent shear flows. This work will assist in the design of quieter jet engines and will also aid in the development of new computational fluid dynamics codes that can be applied to other aeroacoustics problems. The educational component of this work consists of introducing, in a comprehensive fashion, modern numerical methods into the undergraduate curriculum. Such techniques are essential for maintaining our graduating students at the cutting edge of technological application.

提姆·科罗尼乌斯CTS-9501349加州理工学院，这一职业奖的研究部分将从理论上利用第一原理来研究湍流亚音速喷气式飞机产生的声音。对三维非定常流动的运动方程进行了数值求解。这些计算建立在以前开发的用于研究二维混合层中声音产生的数值方法的基础上。这些技术将应用于湍流射流，这是一个湍流剪切流的原型问题。这项工作将有助于设计更安静的喷气发动机，也将有助于开发可应用于其他空气声学问题的新的计算流体动力学程序。这项工作的教育部分包括，以一种全面的方式将现代数值方法引入本科课程。这些技术对于保持我们的毕业生处于技术应用的前沿是必不可少的。