Geely Automotive Institute, Hangzhou Vocational & Technical College, Hangzhou, 310018, China.
Department of Civil Engineering, College of Engineering, Cihan University-Erbil, Erbīl, Iraq.
Sci Rep. 2023 Apr 21;13(1):6549. doi: 10.1038/s41598-023-33739-2.
The main challenge for the advancement of current high-speed automotives is aerodynamic heating. In this study, the application of lateral jet for thermal protection of the high-speed automotives is extensively studied. The simulation of the lateral coolant jet is done via Computational fluid dynamic at high-velocity condition. Finding optimum jet configuration for reduction of the aerodynamic heating is the main goal of this research. Two different coolant jets (Helium and Carbon dioxide) are investigated as coolant jet and flow study and fuel penetration mechanism are fully presented. In addition, the thermal load on the main body of nose cone is compared for different configurations. Our results specify that the injection of lateral jet near the tip of spike is effective for thermal protection of main body via deflection of bow shock. Also, Carbon dioxide jet with lower diffusivity is more effective for the protection of forebody with multi-row disk from sever aerodynamic heating.
当前高速汽车发展的主要挑战是空气动力学加热。在这项研究中，广泛研究了侧向射流在高速汽车热保护中的应用。通过计算流体动力学在高速条件下对侧向冷却射流进行模拟。本研究的主要目标是找到最佳的射流配置以减少空气动力学加热。研究了两种不同的冷却剂射流（氦气和二氧化碳）作为冷却剂射流，并对流动研究和燃料渗透机制进行了全面介绍。此外，还比较了不同构型下对头部锥体主体的热负荷。我们的研究结果表明，在尖刺尖端附近喷射侧向射流通过偏导弓形激波对主体进行有效的热保护。此外，具有较低扩散性的二氧化碳射流更有效地保护多排圆盘的头部免受严重的空气动力学加热。
