Vortex Interactions and Unsteady Wake Dynamics

涡相互作用和不稳定尾流动力学

基本信息

  • 批准号:
    RGPIN-2020-03998
  • 负责人:
  • 金额:
    $ 3.21万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Discovery Grants Program - Individual
  • 财政年份:
    2022
  • 资助国家:
    加拿大
  • 起止时间:
    2022-01-01 至 2023-12-31
  • 项目状态:
    已结题

项目摘要

Unsteady flow around obstacles is a common phenomenon observed in a variety of physical scales, from astrophysical events to microfluidic processes. Understanding the physics of unsteady wakes enables improvements in the design of vehicles, making them more efficient and stable, for example by reducing vortex induced vibrations in drones and trailer trucks. This research also contributes to improving urban development by providing insight on the wake around buildings. The proposed research investigates the fundamental nature of these flows, which involves complex unsteady wake dynamics due to vortex interactions. My research will advance our knowledge in wake dynamics by modeling the contributions of vortex interactions to flow dynamics and unsteady force variations. The fundamental knowledge gained and tools developed here will contribute to the long-term vision of improving the design of vehicles (ground, aerial and underwater) by identifying and modeling the wake mechanisms that contribute the most to unsteady force variations. This will contribute to the development of novel flow manipulation techniques that excite or suppress wake features, for example to lower drag variations. As a result of this work, future vehicles will have higher efficiency and better stability leading to fuel savings and lower emissions. Besides addressing the current knowledge gap in the science of unsteady vortex dynamics, the proposed research will develop new tools for accurate and timely modelling of flow around vehicles with realistic conditions, such as high speed 3D turbulent flow. This turbulence model (non-linear eddy viscosity model) will be specially designed for simulating wakes with large curvatures and pressure-gradients, commonly observed in vehicles, which cannot be simulated accurately and efficiently using existing models. The knowledge gained in wake dynamics will then be used to develop the concept of electromagnetically induced vortices (EIVs) as a novel technique for vortex manipulation in different flows. This is a new and novel technique that has not been applied to large-scale wakes, for example of vehicles and buildings, despite successes in micro-fluidic devices. The advantages of this new technology will be more non-intrusive control on flow manipulation over longer distances and in complex conditions. The research proposed here, although fundamental in nature, is motivated, especially in the short term, by improving the design of vehicles. The combination of tools (turbulence model), science (unsteady vortex dynamics) and technology (EIVs) developed by my multidisciplinary team of HQPs will significantly advance our knowledge of unsteady wake dynamics. This has major and broad implications in design of aerial and underwater vehicles through drag reduction and enhanced dynamic stability. Moreover, this research aims to identify, interpret and model data in a way that is meaningful to other researchers and industry practitioners.
从天体物理事件到微流体过程,障碍物周围的非定常流动是在各种物理尺度上观察到的一种常见现象。了解非定常尾迹的物理特性有助于改进车辆的设计,使其更高效、更稳定,例如减少无人机和拖车的涡激振动。这项研究还提供了对建筑物周围尾流的见解,有助于改善城市发展。本研究探讨了这些流动的基本性质,其中涉及旋涡相互作用引起的复杂非定常尾流动力学。我的研究将通过模拟涡相互作用对流动动力学和非定常力变化的贡献来提高我们在尾流动力学方面的知识。在这里获得的基础知识和开发的工具将有助于通过识别和建模对非定常力变化贡献最大的尾流机制来改进车辆(地面,空中和水下)的设计。这将有助于开发新的流动操纵技术,以激发或抑制尾迹特征,例如降低阻力变化。这项工作的结果是,未来的车辆将具有更高的效率和更好的稳定性,从而节省燃料和降低排放。除了解决当前非定常涡旋动力学科学的知识缺口外,所提出的研究将开发新的工具,以准确和及时地模拟具有现实条件的车辆周围流动,例如高速三维湍流。该湍流模型(非线性涡流粘度模型)将专门用于模拟车辆中常见的具有大曲率和压力梯度的尾迹,而现有模型无法准确有效地模拟这些尾迹。在尾流动力学中获得的知识将用于发展电磁感应涡(eiv)的概念,作为一种在不同流动中操纵涡的新技术。这是一种新的技术,尽管在微流体装置上取得了成功,但尚未应用于大规模的尾迹,例如车辆和建筑物。这项新技术的优势在于,在长距离和复杂条件下,对流体控制的非侵入式控制。这里提出的研究,虽然本质上是基础性的,但其动机,特别是在短期内,是为了改进车辆的设计。我的多学科HQPs团队开发的工具(湍流模型)、科学(非定常涡动力学)和技术(eiv)的结合将大大提高我们对非定常尾流动力学的认识。通过减少阻力和增强动态稳定性,这对空中和水下航行器的设计具有重大而广泛的影响。此外,本研究旨在以一种对其他研究人员和行业从业者有意义的方式识别、解释和建模数据。

项目成果

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Hemmati, Arman其他文献

Why do anguilliform swimmers perform undulation with wavelengths shorter than their bodylengths?
  • DOI:
    10.1063/5.0040473
  • 发表时间:
    2021-03-01
  • 期刊:
  • 影响因子:
    4.6
  • 作者:
    Khalid, Muhammad Saif Ullah;Wang, Junshi;Hemmati, Arman
  • 通讯作者:
    Hemmati, Arman
Nonlinear response of passively flapping foils
  • DOI:
    10.1016/j.oceaneng.2022.112071
  • 发表时间:
    2022-08-10
  • 期刊:
  • 影响因子:
    5
  • 作者:
    Farooq, Hamayun;Khalid, Muhammad Saif Ullah;Hemmati, Arman
  • 通讯作者:
    Hemmati, Arman

Hemmati, Arman的其他文献

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{{ truncateString('Hemmati, Arman', 18)}}的其他基金

Vortex Interactions and Unsteady Wake Dynamics
涡相互作用和不稳定尾流动力学
  • 批准号:
    RGPIN-2020-03998
  • 财政年份:
    2021
  • 资助金额:
    $ 3.21万
  • 项目类别:
    Discovery Grants Program - Individual
Application of Fixed-Wings in Multi-Rotor Drones for Additional Lift
固定翼在多旋翼无人机附加升力中的应用
  • 批准号:
    567789-2021
  • 财政年份:
    2021
  • 资助金额:
    $ 3.21万
  • 项目类别:
    Alliance Grants
Reconfiguring In-Situ Thermal Oil Recovery facilities for Steam Assisted Geothermal Power (SAGP) Extraction
重新配置蒸汽辅助地热发电 (SAGP) 开采的原位热油回收设施
  • 批准号:
    556563-2020
  • 财政年份:
    2021
  • 资助金额:
    $ 3.21万
  • 项目类别:
    Alliance Grants
Vortex Interactions and Unsteady Wake Dynamics
涡相互作用和不稳定尾流动力学
  • 批准号:
    DGECR-2020-00490
  • 财政年份:
    2020
  • 资助金额:
    $ 3.21万
  • 项目类别:
    Discovery Launch Supplement
Vortex Interactions and Unsteady Wake Dynamics
涡相互作用和不稳定尾流动力学
  • 批准号:
    RGPIN-2020-03998
  • 财政年份:
    2020
  • 资助金额:
    $ 3.21万
  • 项目类别:
    Discovery Grants Program - Individual
Reconfiguring In-Situ Thermal Oil Recovery facilities for Steam Assisted Geothermal Power (SAGP) Extraction
重新配置蒸汽辅助地热发电 (SAGP) 开采的原位热油回收设施
  • 批准号:
    556563-2020
  • 财政年份:
    2020
  • 资助金额:
    $ 3.21万
  • 项目类别:
    Alliance Grants
Development of Reliable Wind Assessment Tool
开发可靠的风力评估工具
  • 批准号:
    530002-2018
  • 财政年份:
    2018
  • 资助金额:
    $ 3.21万
  • 项目类别:
    Connect Grants Level 1
Bio-inspired propulsors for efficient and high-speed locomotion, and energy harvesting
用于高效高速运动和能量收集的仿生推进器
  • 批准号:
    487807-2016
  • 财政年份:
    2017
  • 资助金额:
    $ 3.21万
  • 项目类别:
    Postdoctoral Fellowships
Investigating the unsteady lift and drag generation on oscillating airfoils, and their relationship with vortex structures in the surrounding flows
研究振荡翼型产生的非定常升力和阻力,及其与周围流中涡流结构的关系
  • 批准号:
    426863-2012
  • 财政年份:
    2012
  • 资助金额:
    $ 3.21万
  • 项目类别:
    Alexander Graham Bell Canada Graduate Scholarships - Master's

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进一步深入了解非定常 3D 涡流的动力学和相互作用
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环境流中各种界面上发生的非稳态流固相互作用的实验和数值模拟
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Vortex Interactions and Unsteady Wake Dynamics
涡相互作用和不稳定尾流动力学
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关于不稳定三维流及其与翼型和钝体相互作用的新见解
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