This study focuses on an experimental and numerical heat transfer investigation of an impingement jet array with a concave target plate that resembles a turbine blade's leading edge. The array consists of nine circular jets with a diameter of $D_{jet}$ and the target plate has a curvature radius of $R=D_{jet}$. The target plate also features film cooling holes in a staggered configuration so that each jet is surrounded by three film cooling holes. A Reynolds number of $\mathrm{30,000}$ is tested, while the separation distance H is altered between $H/D_{jet}=2.7$ and $H/D_{jet}=4$. In addition the jets are exposed to a crossflow (cf). The experimental heat transfer data are obtained by using the transient Thermochromic Liquid Crystal (TLC) method. In the Computational Fluid Dynamics (CFD) study 3D steady state Reynolds-Averaged Navier-Stokes (RANS) simulations with the software package OpenFOAM and the $k\omega -\text{shear}-\text{stress}-\text{transport }\left(\text{SST}\right)$ turbulence model are performed. The numerical results from OpenFOAM agree well with the experimental data and local flow phenomena are captured correctly. The crossflow decreases the stagnation point heat transfer as well as the overall heat transfer but homogenizes the local heat transfer distribution. A smaller separation distance enhances the crossflow effects and generally increases the heat transfer level.

这项研究的重点是对具有类似涡轮叶片前缘的凹形靶板的冲击射流阵列进行实验和数值传热研究。该阵列由九个直径为$d_{ĴËŤ}$ 并且目标板的曲率半径为 $\mathrm{[R}=d_{ĴËŤ}$。目标板还具有交错配置的薄膜冷却孔，以使每个喷嘴都被三个薄膜冷却孔围绕。雷诺数$\mathrm{30,000}$被测试，而分隔距离H在$H/d_{ĴËŤ}=2.7$ 和 $H/d_{ĴËŤ}=4$。另外，射流暴露于错流（cf）。通过使用瞬态热致变色液晶（TLC）方法获得实验传热数据。在计算流体动力学（CFD）研究中，使用OpenFOAM软件包和以下软件对3D稳态雷诺平均Navier-Stokes（RANS）模拟$ķ\omega -\text{剪力}-\text{强调}-\text{运输 }（\text{SST}）$进行湍流模型。OpenFOAM的数值结果与实验数据非常吻合，并且可以正确捕获局部流动现象。错流减少了停滞点传热以及整体传热，但使局部传热分布均匀化。较小的分离距离可增强错流效果，并通常提高热传递水平。