Movement of Planing Surfaces on Highly Compressible Soft Porous Media

高可压缩软多孔介质上刨削表面的运动

• 批准号: 0432229
• 负责人: Sheldon Weinbaum
• 金额: $ 24.02万
• 依托单位: CUNY City College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0432229&HistoricalAwards=false
• 关键词: Movement; Planing; Surfaces; Highly; Compressible

PROPOSAL NO.: CTS-0432229PRINCIPAL INVESTIGATOR: SHELDON WEINBAUMINSTITUTION: CUNY CITY COLLEGEMOVEMENT OF PLANING SURFACES ON HIGHLY COMPRESSIBLE SOFT POROUS MEDIA This grant is for a combined experimental and theoretical investigation on enhancing the lubricating pressures on planar lifting surfaces by having them glide over highly compressible soft porous media. Using concepts illustrated by the motion of a red cell moving through a tightly fitting capillary, it was shown by the PI that the drag force due to sliding friction can also be dramatically reduced if the elastic restoring force of the solid phase is small compared to the lift force generated by the transiently trapped fluid.Employing these insights, this grant explores a new concept for a future generation train which rides on a track with mechanical properties akin to goose down. Two different designs for the top porous surface of the track and the underside of the train car will be examined to determine which provides a superior sliding interface. The laboratory scale train-track model will be fully instrumented to measure the transient pressures developed in the soft porous track bed, the slope of the underside of the train car (the planing surface) as a function of its velocity and the forces and accelerations on the moving train car. A simplified theoretical model is also developed to predict the performance characteristics of the laboratory model and its full scale design. The research has exceptional potential for broad impact by integrating research and education into the curriculum. It has already piqued the interest of graduate and undergraduate students in both the mechanical and biomedical engineering departments. A 2004 paper published by the PI in Physical Evaluation Letters has also been covered by Science, Nature and nearly 60 other publications world-wide. The Discovery Channel has contacted the PIs for a demonstration of the concept and may produce a segment for the general public. The program and the novel experimental facility that is to be constructed will also be used as part of a summer enrichment program for high school students interested in science and engineering. The proposed research will also provide opportunities to outstanding undergraduates, particularly women and minorities.

提案编号： CTS-0432229主要制造商：谢尔顿WEINBAUM机构： CUNY CITY COLLEMEMOVEMENT OF PLANING SURFACES ON HLY COMPRESSIBLE SOFT POROUS MEDIA该基金用于通过使平面升力面在HLY COMPRESSIBLE SOFT POROUS MEDIA上滑行来提高其润滑压力的综合实验和理论研究。使用红细胞移动通过紧密配合的毛细管的运动所示的概念，PI表明，如果固相的弹性恢复力与瞬时捕获的流体产生的升力相比很小，则由于滑动摩擦引起的阻力也可以显着减少。这项拨款旨在探讨新一代列车的新概念，即在机械性能类似鹅绒的轨道上行驶。 将检查轨道的顶部多孔表面和火车车厢的下侧的两种不同设计，以确定哪一种提供了更好的上级滑动界面。实验室规模的火车轨道模型将配备完整的仪器，以测量软多孔道床中产生的瞬态压力、火车车厢底面（滑行表面）的坡度（作为其速度的函数）以及移动火车车厢上的力和加速度。一个简化的理论模型也被开发来预测实验室模型和其全尺寸设计的性能特征。该研究具有通过将研究和教育纳入课程而产生广泛影响的特殊潜力。 它已经激起了机械和生物医学工程系的研究生和本科生的兴趣。 PI在《物理评价快报》上发表的2004年论文也被《科学》、《自然》和全球近60种其他出版物报道。 探索频道已经联系了PI的概念演示，并可能为公众制作一个片段。该计划和将要建造的新实验设施也将被用作对科学和工程感兴趣的高中生夏季充实计划的一部分。 拟议的研究还将为优秀的本科生，特别是妇女和少数民族提供机会。