Development and characterisation of a turbulent boundary layer facility at the Delft University of Technology

IF 5.8 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2025-09-25 DOI:10.1016/j.ast.2025.110972

Max W. Knoop, Abdelrahman Hassanein, Woutijn J. Baars

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引用次数: 0

Abstract

A new facility for studying turbulent boundary layer flows has been developed at the Delft University of Technology and is referred to as the DU-BLF: Delft University Boundary Layer Facility. Its design and boundary layer data characteristics are presented in the current work. The DU-BLF can be employed for a range of studies revolving around boundary layer flows, e.g., covering fundamentals of boundary layer development, flow control with passive surface modifications, and control efforts with active technologies. A modular setup of the test section allows for a relatively long development length, with both physical and optical access over its complete extent. For the present characterisation, a turbulent boundary layer was developed under a zero (streamwise) pressure gradient, with the aid of a flexible ceiling. We establish the general flow characteristics, including freestream turbulence intensity levels, acoustic noise characteristics, boundary layer-integral parameters, and wall-normal profiles of the first and second-order turbulence statistics. Results are validated by employing multiple measurement techniques, namely, hot wire anemometry, particle image and tracking velocimetry, and wall-pressure measurements. Results are shown for friction Reynolds numbers up to

R e_{τ} \approx 5 100

, and reveal that the boundary layer flow adheres to the expected behaviour of canonical wall-bounded turbulence. Data of the current turbulent boundary layer measurements are made available online.

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代尔夫特理工大学紊流边界层设备的开发与表征

代尔夫特理工大学开发了一种研究湍流边界层流动的新设备，称为DU-BLF：代尔夫特大学边界层设备。本文介绍了它的设计和边界层数据特征。DU-BLF可以用于围绕边界层流动的一系列研究，例如，涵盖边界层发展的基本原理，被动表面修饰的流动控制，以及主动技术的控制努力。测试部分的模块化设置允许相对较长的开发长度，在其完整范围内具有物理和光学访问。对于目前的表征，湍流边界层在零（流向）压力梯度下发展，借助柔性天花板。我们建立了一般的流动特征，包括自由流湍流强度水平、声学噪声特征、边界层积分参数和一阶和二阶湍流统计的壁法向分布。结果通过采用多种测量技术进行验证，即热线风速测量，颗粒图像和跟踪速度测量以及壁压测量。结果表明，摩擦雷诺数高达Reτ≈5100时，边界层流动符合典型壁面湍流的预期行为。目前的湍流边界层测量数据可在线获得。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.