Development of smart surfaces for flow management/re-arrangement

开发用于流量管理/重新安排的智能表面

• 批准号: 1642-2013
• 负责人: Floryan, Jerzy
• 金额: $ 4.01万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=638904
• 关键词: Development; smart; surfaces; flow; management

Many industrial products contain flow systems whose performance affects the overall product capabilities, especially the energy cost associated with their operation. Reduction of the energy cost may come primarily through the reduction of drag. The present work is focused on the development of smart surfaces that would provide a means for an effective management/re-arranging of flows. Surfaces that reduce the skin friction laminar drag, affect the drag by delaying/accelerating the laminar-turbulent transition and reduce the turbulent drag by re-arranging the bulk flow, as well as turbulence production, are sought. An understanding of the fluid mechanics at the solid interfaces provides a basis for the development of smart surfaces. The flow dynamics can be influenced by surface topography, micro-electro-mechanical devices, synthetic jets, pulsed-blowing, plasma actuators, wall transpiration and heating, for example. All these effects provide means for the creation of flow forcing (control actuation). An understanding of the changes that can be created in the flow using different forms of forcing forms the core of this work. A significant change of flow properties typically requires the use of strong forcing. The use of a large number of simple, weak actuators (a swarming of actuators) is pursued in this work. Such actuators require only a small energy input but can be effective only if they form patterns. It is the interaction of such patterns (rather than the individual actuators) that may produce the desired flow response. The objective of this work is to study what patterns are hydraulically significant and what kinds of flow response can be achieved. The focus on the creation of smart surfaces, based on patterns of simple actuators, differentiates this work from any other competing approaches. Smart surfaces have a wide range of applications, for example in the aerospace, ship-building, pharmaceutical and bio-medical industries, among others.

许多工业产品都包含流体系统，其性能会影响产品的整体性能，特别是与其运行相关的能源成本。降低能源成本可能主要是通过减少阻力来实现的。目前的工作重点是智能表面的发展，这将为有效管理/重新安排流动提供一种手段。寻求减少表面摩擦层流阻力，通过延迟/加速层流-湍流过渡来影响阻力，通过重新安排大量流动来减少湍流阻力以及湍流产生的表面。对固体界面流体力学的理解为智能表面的发展提供了基础。流动动力学可以受到表面形貌、微机电装置、合成射流、脉冲吹气、等离子体致动器、壁蒸腾和加热等因素的影响。所有这些影响都为产生流动强迫（控制驱动）提供了手段。理解使用不同形式的强迫可以在流中产生的变化是这项工作的核心。流动特性的显著变化通常需要使用强力。在这项工作中追求使用大量简单的弱执行器（一群执行器）。这种致动器只需要很小的能量输入，但只有当它们形成图案时才能有效。这是这些模式（而不是单个执行器）的相互作用，可能产生所需的流量响应。这项工作的目的是研究什么模式是水力显著和什么样的流动响应可以实现。基于简单致动器的模式，专注于智能表面的创造，将这项工作与其他竞争方法区分开来。智能表面具有广泛的应用，例如在航空航天，造船，制药和生物医疗行业等。