Abstract Strut-support interference effects were investigated at a nominal Mach number of 6. Cylinder and rhombus models are used; moreover, models called half shock-bump (SB) and SB applied to the front and both sides of the shock-bump shape are used. This is beneficial for free-stream flow recovery around the model surface by bumping the compression and expansion waves at a unit Reynolds number of approximately $$17.8 \times 10^{3}/\hbox {m}$$ 17.8 × 10 3 / m and a total enthalpy of approximately 1.9 MJ/kg. A quantitative density field analysis is conducted using the background-oriented schlieren technique, which is validated by measuring the shock stand-off distance and density increase rate on a hemisphere model. In this study, flow interference is divided into the measurements of the recompression shock zone thickness as a wake interference and the free-stream flow density recovery beyond the oblique shock as a strut interference. In the SB model, the thickness of the recompression shock zone is approximately 4.4 ± 0.2 mm, which is a reduction of approximately 53% compared with the cylinder model. In the oblique shock wave height measurements, defined by measuring the intersection of the increasing and decreasing points of density, the SB model shows a height of 16.4 mm, which is approximately 33.6% less than the 24.7 mm height of the cylinder model. In addition, the free-stream flow density beyond the oblique shock wave in the SB model is found to have an approximately 10% deviation from the free-stream density of 0.016 $$\hbox {kg/m}^{3}$$ kg/m 3 , which is more effective than the 106% higher value in the cylinder model. Through such studies of flow interference, the effect of the SB shape on the strut-support is verified. Graphic abstract

中文翻译：

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高速流动中的支柱干涉研究

摘要 研究了标称马赫数为 6 时的支柱-支撑干涉效应。使用圆柱模型和菱形模型；此外，使用称为半冲击波（SB）和适用于冲击波形状正面和两侧的 SB 的模型。通过以大约 $$17.8 \times 10^{3}/\hbox {m}$$ 17.8 × 10 3 / m 的单位雷诺数碰撞压缩和膨胀波，这有利于模型表面周围的自由流恢复和大约 1.9 MJ/kg 的总焓。使用面向背景的纹影技术进行了定量密度场分析，该技术通过测量半球模型上的冲击间隔距离和密度增加率来验证。在这项研究中，流动干扰分为作为尾流干扰的再压缩激波区厚度的测量和作为支柱干扰的斜激波以外的自由流流动密度恢复。在SB模型中，再压缩冲击区的厚度约为4.4±0.2mm，与圆柱模型相比减少了约53%。在斜激波高度测量中，通过测量密度增加点和减少点的交点来定义，SB 模型显示高度为 16.4 mm，比圆柱模型的 24.7 mm 高度小约 33.6%。此外，发现 SB 模型中斜激波之外的自由流密度与 0.016 $$\hbox {kg/m}^{3}$$ 的自由流密度有大约 10% 的偏差公斤/米 3 , 这比气缸模型中高 106% 的值更有效。通过此类流动干扰研究，验证了 SB 形状对支柱支撑的影响。图形摘要