Wind Tunnel Experiments with Flexible Plates in Transonic Flows
Wind Tunnel Experiments with Flexible Plates in Transonic Flows
复制标题
跨音速流动中柔性板的风洞实验
DOI：
10.2514/6.2016-1553
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发表时间：
2016
影响因子：
5.6
通讯作者：
M. Santer
中科院分区：
文献类型：
--
作者：
E. Jinks;P. Bruce;M. Santer
在自适应冲击控制凸轮(SCB)设计的发展过程中，系统的灵活性增加到了气动载荷可以影响平板变形的程度。通过研究柔性板在跨声速流动中的响应，可以研究流固耦合问题。在这项研究中，不同长宽比(1和1.33)的薄板(0.4和0.6 mm厚)暴露在1.4马赫的法向冲击波中。PIV与纹影成像结合使用，可以提供围绕板块的流动曲率以及全球激波结构的详细视图。还介绍了一种从PIV图像中提取板块变形的技术，该技术为每次测试提供了流体和结构信息。讨论了平板与水流角度的关系，以及各平板构型对板刚度和自由流的影响。结果表明，柔性板在被动或主动控制冲击控制凸轮设计中具有很大的应用潜力。
The evolution of adaptive shock control bump (SCB) design has seen the system flexibility increase to a point where the aerodynamic loading can affect the deformation of the plate. By studying the response of a flexible plate in a transonic flow the fluid structure interaction can be investigated. In this study, thin plates (0.4 and 0.6 mm thick) with different aspect ratios (1 and 1.33) are exposed to a Mach 1.4 normal shockwave. PIV is used in combination with Schlieren imaging to provide a detailed view of the flow curvature surrounding the plate as well as the global shock structure. A technique that extracts the plate deformation from the PIV images is also presented which provides fluid and structural information for each test. The relationship between plate and flow angle is discussed as well as the effect of plate stiffness and free stream influence of each plate configuration. The results demonstrate that flexible plates show great potential for integration into passive or actively controlled shock control bump designs.