Acquisition of Two-Dimensional Flowlite Laser Doppler Anemometer

二维 Flowlite 激光多普勒风速计的采集

• 批准号: 0617981
• 负责人: Joseph Cataldo
• 金额: $ 11.5万
• 依托单位: Cooper Union
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0617981&HistoricalAwards=false
• 关键词: Acquisition; Two; Dimensional; Flowlite; Laser

Abstract:This award to The Cooper Union for the Advancement of Science and Art is for the purchase of a Two-Dimensional Flowlite Laser Doppler Anemometer (LDA) for the Fluids Laboratory of the Albert Nerken School of Engineering. The Principal Investigator Joseph Cataldo, Professor of Civil Engineering, will use the equipment in connection with experiments in thermal plume, jet dynamics, and flutter, areas of research that are presently being conducted or are planned in connection with this research program.The versatility of the LDA will provide faculty and students with the opportunity to build on the engineering school's research in hydrodynamics, which it has been conducting for over three decades. The school's Fluids Laboratory has been the setting for experiments on such topics as: 1) static and dynamic effects of power plant thermal plumes; 2) thermal fronts; 3) patternization and quantification of the lake water entrainment into a discharge plume; 4) stratified flow in combined sewage overflow; 5) monitoring petroleum contamination in an aquifer; 6) interaction of surface waves and a jet; 7) flow visualization and radial velocity measurements of entrainment in an axisymmetric turbulent jet; 8) the study of Reynolds number on a jet; 9) chaos; 10) low Reynolds number in a jet; and, 11) hydrodynamic flutter.The laser will be used to open up new areas of research into complex two- and three-dimensional behavior through and around oscillating plates in the flutter experiment. The Reynolds stress in the jet experiments can be determined for low Reynolds numbers, surface wave interaction with the jet and entrainment flows. Also the movement of the thermal fronts can be determined with the proposed Flowlite system. The hot wire probe is presently being used. The size, weight and one dimensional flow limitation of the present LDA makes it impossible to obtain comprehensive two- and three- dimensional flow measurements. The proposed Flowlite LDA can measure X, Y, Z positions of the velocity flows and trace the movement of the fronts.One of the impediments of the current system is that it is used almost continuously during school hours by our graduate students, making it nearly impossible to schedule its use for demonstrations of fluid phenomenon to our undergraduate students. The acquisition of the proposed Flowlite LDA system means that our undergraduate students will also have an LDA for their term laboratory projects. Moreover, acquisition of the instrument enables us to have available a laser for demonstration and experiments in required undergraduate courses. Most important, the new LDA will enhance ongoing collaborations between civil and mechanical engineering (e.g., the aforementioned flutter experiment was conducted in the wind tunnel in the Mechanical Engineering Laboratory adjacent to the Fluids Laboratory), making it possible for our mechanical engineering students to conduct joint projects with our civil engineering students. The improved mobility and lightweight of the Flowlite LDA make it virtually a portable system; and it is virtually maintenance free.

摘要：库珀联盟科学与艺术促进奖旨在为阿尔伯特·纳肯工程学院流体实验室购买二维 Flowlite 激光多普勒风速计 (LDA)。 首席研究员、土木工程教授 Joseph Cataldo 将使用该设备进行热羽流、射流动力学和颤振​​实验，这些研究领域目前正在进行或计划与本研究项目相关。 LDA 将为教职员工和学生提供机会，以工程学院在流体动力学方面的研究为基础，该研究已进行了三十多年。 学校的流体实验室一直是以下主题实验的场所：1）发电厂热羽流的静态和动态效应； 2）热锋； 3) 排放羽流中湖水夹带的模式化和量化； 4）合流污水溢流分层流； 5）监测含水层中的石油污染； 6) 表面波与射流的相互作用； 7) 轴对称湍流射流中夹带的流动可视化和径向速度测量； 8）喷气机雷诺数的研究； 9）混乱； 10) 喷气机中的低雷诺数； 11）流体动力颤振。激光将用于开辟新的研究领域，研究颤振实验中通过振荡板及其周围的复杂二维和三维行为。 射流实验中的雷诺应力可以根据低雷诺数、表面波与射流和夹带流的相互作用来确定。 此外，热锋的运动可以通过建议的 Flowlite 系统来确定。 目前正在使用热线探头。 目前LDA的尺寸、重量和一维流量限制使得不可能获得全面的二维和三维流量测量。 所提出的 Flowlite LDA 可以测量速度流的 X、Y、Z 位置并跟踪前沿的运动。当前系统的障碍之一是我们的研究生在上课期间几乎连续使用它，这使得它几乎不可能安排它用于向我们的本科生演示流体现象。 收购拟议的 Flowlite LDA 系统意味着我们的本科生也将拥有用于学期实验室项目的 LDA。 此外，该仪器的购置使我们能够在本科必修课程中拥有用于演示和实验的激光器。 最重要的是，新的LDA将加强土木工程和机械工程之间的持续合作（例如，前面提到的颤振实验是在流体实验室附近的机械工程实验室的风洞中进行的），使我们的机械工程学生能够进行与我们的土木工程专业学生的联合项目。 Flowlite LDA 改进的移动性和轻量化使其几乎成为便携式系统；而且几乎无需维护。