Gas Dynamic Principles and Experimental Investigations of Shock Tunnel Produced Coatings
Gas Dynamic Principles and Experimental Investigations of Shock Tunnel Produced Coatings
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冲击隧道制备涂层的气体动力学原理及实验研究
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
H. Olivier
中科院分区：
文献类型：
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作者：
X. Luo;H. Olivier
为了提高涂层质量，采用激波隧道技术，对10 μm的固体颗粒，将颗粒的冲击速度提高到1500 m/s。在参数研究的基础上，在亚琛工业大学冲击波实验室（SWL）建立了一个实验装置。用皮托管耙对喷嘴流量进行了标定。目前所达到的储层条件为：p0 = 140 bar, T0 = 1800 K。建立了高速纹影系统，用于流动显示和可见颗粒的速度测量。对于细颗粒，LDA和PIV两种方法都用于颗粒速度测量。所得结果与准一维预测结果吻合较好。对钢基体上的铜首次涂层样品进行了质量分析，结果表明有很大的改善。为了进一步评估该技术，必须在不同的涂层和基材组合、不同的粒子速度和温度下进行系统的实验。
For enhancing coating quality, the shock tunnel technology is employed to increase impact velocities of particles up to 1,500 m/s for 10-μm solid particles. Based on a parametric study, an experimental facility has been set up at the Shock Wave Laboratory (SWL) of RWTH Aachen University. A calibration of the nozzle flow has been carried out using a Pitot rake. The conditions in the reservoir achieved so far are p0 = 140 bar and T0 = 1,800 K. A high-speed schlieren system is set up for flow visualization and also for velocity measurement of visible particles. For fine particles, both LDA and PIV methods are used for particle velocity measurements. The results achieved are in good agreement with a quasi-1D prediction. The quality of a first coating sample of copper on a steel substrate is analyzed which shows a promising improvement. Systematic experiments have to be carried out with different material combinations of coating and substrate, different particle velocities, and temperatures for further evaluation of this technique.