New method for visualizing three-dimensional shock shapes around hypersonic vehicles using an electrical discharge
New method for visualizing three-dimensional shock shapes around hypersonic vehicles using an electrical discharge
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使用放电可视化高超音速飞行器周围三维冲击形状的新方法
DOI：
10.2514/3.10525
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
Masatomi Nishio
中科院分区：
文献类型：
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作者：
Masatomi Nishio
本文描述了一种利用放电可视化高超声速飞行器周围三维激波形状的新方法。该方法基于以下思想。当通过冲击波产生放电时，冲击波可以看作是放电中的暗部。三维激波形状可以通过在流动的后方拍摄放电照片来可视化。该方法的开发是为了使使用单个放电可视化车辆周围的宽场冲击形状成为可能。首先，对楔形上的横向激波形状进行了可视化，以研究新方法获得的激波形状的准确性。将可视化结果与纹影照片进行了比较，发现两者的结果符合得很好。这证明了新方法是一种可行的激波形状可视化方法。接下来，一个分离的横截面冲击形状的三角翼成功地可视化。横截面激波的形状不能被像纹影法这样的光学系统可视化。因此，可以得出结论，新的方法是优越的可视化三维激波形状。
This paper describes a new method for visualizing three-dimensional shock shapes around hypersonic vehicles using an electrical discharge. The method is based on the following ideas. When an electrical discharge is generated across a shock wave, the shock wave can be seen as a dark portion in the electrical discharge. The three-dimensional shock shape can be visualized by taking a discharge photograph in the rear direction of the flow. The method was developed to make it possible to visualize wide field shock shapes around vehicles using a single electrical discharge. First, a lateral shock shape over a wedge was visualized to investigate the accuracy of the shock shape obtained by the new method. The visualized result was compared with a schlieren photograph, and it was found that the results of both agreed sufficiently. This proved that the new method is a viable method for visualizing shock shapes. Next, a detached cross-sectional shock shape over a delta wing was successfully visualized. Cross-sectional shock shapes cannot be visualized by such optical systems as the schlieren method. Therefore, it can be concluded that the new method is superior for visualizing three-dimensional shock shapes.