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

9815204WilliamsThis奖支持一个为期三年的合作研究项目之间的教授福尔曼威廉姆斯的加州，圣地亚哥大学和教授Junichi Furukawa东京都立技术学院在日本。 研究人员将进行一项关于湍流预混火焰中火焰的燃烧速度的研究。 其目的是提高对小火焰区火焰结构的认识。 小火焰区是化学反应时间比湍流时间短的区域。 在这种状态下，湍流火焰由运动的预混层流火焰系综组成。 美国合作者推导出湍流应变率与火焰结构和传播速度之间的理论关系。 日本合作者开发了一种四元件静电探针，可能可以测量预混湍流火焰中火焰的这些特性。 该项目汇集了两个具有互补专业知识和研究能力的实验室的努力。美国研究人员的专长是理论分析和理解，日本研究人员的专长是实验技术和结果。 如果成功，这种方法可以被广泛采用，因为它更容易操作，设备比光学方法便宜。 通过交流思想和技术，该项目将扩大我们的基本知识基础，促进国际理解与合作。

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.***