We present an experimental benchmark database for the transitional cavity flow. The database is obtained by planar Particle Image Velocimetry measurements at the median plane of the cavity model, for Reynolds numbers between 6300 and 19,000 based on the cavity height. A detailed uncertainty analysis of the experimental results is performed via the correlation statistics method for PIV uncertainty quantification and linear error propagation.

The experimental results are compared to two-dimensional Reynolds-Averaged Navier Stokes (RANS) numerical simulations with different turbulence models. It is shown that, when the standard k-ω turbulence model is employed, the discrepancy between numerical simulations and experimental results exceeds the uncertainty of the latter. Conversely, RANS simulations with the SST k-ω turbulence model agree well with the experimental data in terms of time-averaged flow properties; however, the turbulent kinetic energy results present significant discrepancies at all considered Reynolds numbers. The data presented in this paper is made available for open-access download via the 4TU.ResearchData repository with DOI: https://do i.org//10.4121/14061233.

我们提出了过渡腔流的实验基准数据库。该数据库是通过在空腔模型的中间平面进行平面粒子图像测速测量获得的，雷诺数基于空腔高度在 6300 和 19,000 之间。通过 PIV 不确定性量化和线性误差传播的相关统计方法对实验结果进行详细的不确定性分析。

将实验结果与具有不同湍流模型的二维雷诺平均纳维斯托克斯 (RANS) 数值模拟进行比较。结果表明，当采用标准k-ω湍流模型时，数值模拟与实验结果的差异超过了后者的不确定性。相反，使用 SST k-ω 湍流模型的 RANS 模拟在时间平均流动特性方面与实验数据非常吻合；然而，湍流动能结果在所有考虑的雷诺数下都存在显着差异。本文中提供的数据可通过带有 DOI 的 4TU.ResearchData 存储库开放获取下载：https://do i.org//1​​0.4121/14061233。