Surface Pressure Spectra Beneath High Reynolds Number Smooth and Rough Wall Boundary Layers in Pressure Gradients

This dataset contains surface pressure autospectral densities, mean velocity profiles, and mean boundary layer parameters for a systematic family of high Reynolds number (11,000 < Re_theta < 83,000) low Mach number (0.08 < M < 0.20) turbulent boundary layer flows over smooth and very rough (300 < k+ < 900) surfaces in adverse and favorable continually varying mild pressure gradients (-0.8 < beta < 0.8). There are two Reynolds number and twelve pressure gradient cases (twenty-four total) for each surface treatment and seven measurement locations within each flow case, for a total of 336 unique flow conditions. For each condition, there is an auto spectral density of fluctuating pressure G_pp (Pa2/Hz) vs. f (Hz), mean velocity profiles dimensional (u vs. y) and viscous-normalized (u+ vs. y+), and an array of relevant scalar parameters, including local density and viscosity, boundary layer thicknesses, skin friction coefficient, and other parameters from the literature. These cases are generated by studying the boundary layer on the side-wall of a wind tunnel test-section while a NACA0012 airfoil is present in the test-section center. The presence of the airfoil displaces pressure gradient distributions on the wall as a function of model angle of attack. This dataset is associated with two resource DOI’s: 10.2514/1.J061431, 10.1007/s00348-022-03476-9 . The resource title “Fluctuating Pressure Beneath Smooth Wall Boundary Layers in Non-Equilibrium Pressure Gradients” associated with the resource DOI 10.2514/1.J061431 is already published. The resource title “Turbulence and pressure fluctuations in rough wall boundary layers in pressure gradients” associated with the resource DOI 10.1007/s00348-022-03476-9 is accepted and should be published soon.

本数据集包含系统性高雷诺数（11000 < Re_θ < 83000，Re_θ为动量厚度雷诺数）、低马赫数（0.08 < M < 0.20）条件下，光滑表面与极粗糙表面（300 < k+ < 900）上承受持续缓变温和压力梯度（-0.8 < β < 0.8）的湍流边界层流动的表面压力自功率谱密度、平均速度剖面及平均边界层参数，其中压力梯度涵盖不利与有利两种类型。

针对每种表面处理，共包含2种雷诺数工况与12种压力梯度工况（总计24种流动工况），每种流动工况下设7个测量位置，最终共计336种唯一流动工况。

针对每种工况，数据集包含以下内容：脉动压力自功率谱G_pp（Pa²/Hz）随频率f（Hz）的变化曲线、有量纲平均速度剖面（u与y的对应关系）及粘性归一化平均速度剖面（u+与y+的对应关系），同时附带一系列相关标量参数，包括当地密度与粘度、边界层厚度、壁面摩擦系数及其他文献报道的相关参数。

本数据集的工况通过研究风洞试验段侧壁的边界层获得，试验段中心安置有NACA0012翼型。翼型的存在会使壁面压力梯度分布随模型攻角发生变化。

本数据集关联两个资源DOI：10.2514/1.J061431与10.1007/s00348-022-03476-9。其中，与DOI 10.2514/1.J061431关联的资源标题为《非平衡压力梯度下光滑壁边界层下方的脉动压力》，已正式发表；与DOI 10.1007/s00348-022-03476-9关联的资源标题为《压力梯度下粗糙壁边界层的湍流与压力脉动》，已被期刊录用且即将正式出版。