U.S.-Japan Cooperative Science: Burning Velocities of Flamelets in Turbulent Premixed Flames

9815204威廉姆斯该奖项支持加州大学圣地亚哥分校的福尔曼·威廉姆斯教授和日本东京都技术学院的古川纯一教授之间为期三年的合作研究项目。研究人员将进行一项关于火焰在湍流预混火焰中燃烧速度的研究。其目的是提高对火焰区火焰结构的了解。火焰区是化学时间比湍流时间短的区域。在这种情况下，湍流火焰由运动的预混层流小火焰团组成。这位美国合作者推导出了湍流应变率与火炬结构和传播速度之间的理论关系。这位日本合作者开发了一种四元素静电探头，可以潜在地测量预混湍流火焰中火炬的这些特性。该项目汇集了两个拥有互补专业知识和研究能力的实验室的努力。美国的研究人员在理论分析和理解方面有专长，日本在实验技术和结果方面有专长。如果成功，这种方法可能会被广泛采用，因为它比光学方法更容易操作，而且设备更便宜。通过思想和技术的交流，这个项目将扩大我们的基础知识基础，促进国际了解和合作。*

9815204WilliamsThis award supports a three year collaborative research project between Professor Forman Williams of the University of California, San Diego and Professor Junichi Furukawa of the Tokyo Metropolitan Technical College in Japan. The researchers will be undertaking a study concerning burning velocities of flamelets in turbulent premixed flames. The objective is to improve understanding of the flame structure in the flamelet regime. The flamelet regime is the regime in which the chemical times are short compared with the turbulence times. In this regime, the turbulent flame is composed of an ensemble of moving premixed laminar flamelets. The U.S. collaborator has derived theoretical relationships between the turbulence strain rates and the structures and propagation velocities of the flamelets. The Japanese collaborator has developed a four-element electrostatic probe that potentially can measure these properties of flamelets in premixed turbulent flames. This project brings together the efforts of two laboratories that have complementary expertise and research capabilities. The U.S. researchers' expertise is in the area of theoretical analyses and understanding and the Japanese have expertise in the experimental techniques and results. If successful, this approach could be widely adopted, since it is easier to operate and the apparatus is less expensive than the optical approaches. Through the exchange of ideas and technology, this project will broaden our base of basic knowledge and promote international understanding and cooperation.***