Turbulent flows over rough-walls under the influence of streamwise pressure gradients

在流向压力梯度的影响下,粗糙壁上的湍流

基本信息

  • 批准号:
    EP/W026090/1
  • 负责人:
  • 金额:
    $ 109.8万
  • 依托单位:
  • 依托单位国家:
    英国
  • 项目类别:
    Research Grant
  • 财政年份:
    2023
  • 资助国家:
    英国
  • 起止时间:
    2023 至 无数据
  • 项目状态:
    未结题

项目摘要

The efficiency and performance of an aerodynamic surface (wind turbine blade or a ship rudder) is a trade-off between the lift generated and the drag incurred by it. The required lift force is attained by changing the shape and orientation of the geometry, which generates a pressure and load distribution along its length. The drag incurred depends on the characteristics of the turbulent boundary layer flow that develops over the surface. Unfortunately, these two design requirements are not independent of each other as the turbulent boundary layer depends on the overlying non-zero pressure gradient due to the pressure distribution. Additionally, the boundary layer flow also depends on the topographical features (or roughness) of the surface where features as small as 10 microns are considered to be hydrodynamically "rough". This situation where the boundary layer flow is under the influence of both non-zero pressure gradient and surface roughness is pervasive in engineering and environmental applications. Examples include flow over airfoils/turbine blades, ducts, flow over/around buildings, hills/valleys etc. Despite its prevalence, the effects of pressure gradient on flow over rough surfaces remains largely unexplored. As we strive towards net zero carbon emissions by 2050, it is timely to develop new understanding and modelling strategies that capture the influence of pressure gradients on the performance of flow over rough surfaces.In this project, we aim to characterise the evolution of non-zero pressure gradient (PG) turbulent boundary layers (TBL) over rough surfaces and thereby identify the parameters that dictate the response of boundary layers to streamwise pressure gradients. A comprehensive series of wind-tunnel experiments and numerical simulations will be performed to generate unprecedented data on flow over rough-walls subject to favourable and adverse pressure gradients (FPG and APG). The data will underpin identification and validation of potential universalities (and differences) in mechanisms of momentum/energy transfer compared to zero-pressure-gradient (ZPG) flows. The data will then be used to develop and validate both integral models and new Large-Eddy Simulation (LES) models that can be used to predict the performance of flow over arbitrary rough surfaces under the influence of varied pressure gradients. The data will be made available in the public domain through our roughness database (www.roughnessdatabase.org). The overall aim is to establish the interrelationship between roughness and pressure gradients over a broad range of parameters (for pressure gradient and roughness properties), understand the limitations of current models and develop new modelling methods that can be used for predictions in a wide range of applications.
空气动力学表面(风力涡轮机叶片或船舵)的效率和性能是产生的升力和由此产生的阻力之间的权衡。所需的升力是通过改变几何形状和方向来获得的,这会沿其长度产生压力和载荷分布。产生的阻力取决于表面上形成的湍流边界层流的特征。不幸的是,这两个设计要求并不相互独立,因为湍流边界层取决于压力分布导致的上覆非零压力梯度。此外,边界层流动还取决于表面的地形特征(或粗糙度),其中小至 10 微米的特征在流体动力学上被认为是“粗糙”的。这种边界层流动同时受到非零压力梯度和表面粗糙度影响的情况在工程和环境应用中普遍存在。例子包括机翼/涡轮叶片、管道上的流动、建筑物上/周围的流动、丘陵/山谷等。尽管压力梯度很普遍,但粗糙表面上的流动的影响仍然很大程度上未被探索。当我们努力到 2050 年实现净零碳排放时,现在是时候开发新的理解和建模策略来捕捉压力梯度对粗糙表面流动性能的影响。在这个项目中,我们的目标是描述非粗糙表面上的零压力梯度 (PG) 湍流边界层 (TBL),从而确定决定边界层对流向压力梯度响应的参数。将进行一系列全面的风洞实验和数值模拟,以生成前所未有的关于受有利和不利压力梯度(FPG 和 APG)影响的粗糙壁上流动的数据。这些数据将支持识别和验证动量/能量传递机制与零压力梯度(ZPG)流相比的潜在普遍性(和差异)。然后,这些数据将用于开发和验证积分模型和新的大涡模拟(LES)模型,这些模型可用于预测在变化的压力梯度影响下任意粗糙表面上的流动性能。这些数据将通过我们的粗糙度数据库 (www.roughnessdatabase.org) 在公共领域提供。总体目标是在广泛的参数(压力梯度和粗糙度特性)上建立粗糙度和压力梯度之间的相互关系,了解当前模型的局限性并开发可用于各种预测的新建模方法应用程序。

项目成果

期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Development of a floating element photoelastic force balance
浮动元件光弹力天平的研制
  • DOI:
    http://dx.10.1007/s00348-023-03664-1
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    2.4
  • 作者:
    McLaughlin B
  • 通讯作者:
    McLaughlin B
{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

Bharathram Ganapathisubramani其他文献

Volumetric flow characterisation of a rectangular orifice impinging synthetic jet with single-camera light-field PIV
使用单相机光场 PIV 来表征矩形孔口撞击合成射流的体积流量
  • DOI:
    10.1016/j.expthermflusci.2020.110327
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    3.2
  • 作者:
    Zhou Zhao;Junfei Ding;Shengxian Shi;Rene Kaufmann;Bharathram Ganapathisubramani
  • 通讯作者:
    Bharathram Ganapathisubramani

Bharathram Ganapathisubramani的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('Bharathram Ganapathisubramani', 18)}}的其他基金

ary currents in turbulent flows over rough wallsSecond
湍流流过粗糙的墙壁第二
  • 批准号:
    EP/V00199X/1
  • 财政年份:
    2021
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Research Grant
Aerodynamics and aeroacoustics of turbulent flows over and past permeable rough surfaces
穿过可渗透粗糙表面的湍流的空气动力学和气动声学
  • 批准号:
    EP/S013296/1
  • 财政年份:
    2019
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Research Grant
Understanding and exploiting non-equilibrium effects on turbulent boundary layers: Towards realisable drag reduction strategies
理解和利用湍流边界层的非平衡效应:实现可实现的减阻策略
  • 批准号:
    EP/R034370/1
  • 财政年份:
    2018
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Research Grant
Effect of Separation and Stall on Aerofoil Noise
分离和失速对机翼噪声的影响
  • 批准号:
    EP/R010900/1
  • 财政年份:
    2018
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Research Grant
CBET-EPSRC: Turbulent flows over multiscale heterogeneous surfaces
CBET-EPSRC:多尺度异质表面上的湍流
  • 批准号:
    EP/P021476/1
  • 财政年份:
    2017
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Research Grant
Surface-specific Moody-diagrams: A new paradigm to predict drag penalty of realistic rough surfaces with applications to maritime transport
特定于表面的穆迪图:预测现实粗糙表面阻力损失的新范式及其在海上运输中的应用
  • 批准号:
    EP/P009638/1
  • 财政年份:
    2017
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Research Grant
Towards drag reduction strategies for high Reynolds number wall-turbulence
针对高雷诺数壁湍流的减阻策略
  • 批准号:
    EP/L006383/1
  • 财政年份:
    2014
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Research Grant
Scale interactions in wall turbulence: Old challenges tackled with new perspectives
壁湍流中的尺度相互作用:用新视角解决旧挑战
  • 批准号:
    EP/I037717/1
  • 财政年份:
    2012
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Research Grant
TOWARDS BIOLOGICALLY-INSPIRED ACTIVE-COMPLIANT-WING MICRO-AIR-VEHICLES
迈向仿生主动翼微型飞行器
  • 批准号:
    EP/J001465/1
  • 财政年份:
    2012
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Research Grant
Is Fine-Scale Turbulence Universal?
小尺度湍流是普遍存在的吗?
  • 批准号:
    EP/I004785/1
  • 财政年份:
    2011
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Research Grant

相似国自然基金

面向大口径管道流量高精度测量的光纤多参数传感及解耦技术研究
  • 批准号:
    62375045
  • 批准年份:
    2023
  • 资助金额:
    49 万元
  • 项目类别:
    面上项目
适用于液相色谱的皮升流量计量
  • 批准号:
    22304186
  • 批准年份:
    2023
  • 资助金额:
    30 万元
  • 项目类别:
    青年科学基金项目
面向数据中心动态混合流量的网络传输优化关键技术研究
  • 批准号:
    62302472
  • 批准年份:
    2023
  • 资助金额:
    30 万元
  • 项目类别:
    青年科学基金项目
高温高压微细通道换热器的流量分配影响机理与分流方法研究
  • 批准号:
    52376075
  • 批准年份:
    2023
  • 资助金额:
    50 万元
  • 项目类别:
    面上项目
5G网络流量的时空模式、形成机制及其电信节能应用
  • 批准号:
    42371236
  • 批准年份:
    2023
  • 资助金额:
    46 万元
  • 项目类别:
    面上项目

相似海外基金

Numerical Modeling of Turbulent Mixing in Stratified Flows Over Complex Topography
复杂地形层流湍流混合的数值模拟
  • 批准号:
    546731-2020
  • 财政年份:
    2022
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Postgraduate Scholarships - Doctoral
Numerical Modeling of Turbulent Mixing in Stratified Flows Over Complex Topography
复杂地形层流湍流混合的数值模拟
  • 批准号:
    546731-2020
  • 财政年份:
    2022
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Postgraduate Scholarships - Doctoral
CAREER: Fluid-thermal-structural interactions of compressible turbulent flows over flexible panels
职业:柔性面板上可压缩湍流的流体-热-结构相互作用
  • 批准号:
    2143014
  • 财政年份:
    2022
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Continuing Grant
ary currents in turbulent flows over rough wallsSecond
湍流流过粗糙的墙壁第二
  • 批准号:
    EP/V00199X/1
  • 财政年份:
    2021
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Research Grant
Secondary Currents In Turbulent Flows Over Rough Walls
粗糙壁上湍流中的二次流
  • 批准号:
    EP/V002066/1
  • 财政年份:
    2021
  • 资助金额:
    $ 109.8万
  • 项目类别:
    Research Grant
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了