Impulsive force measurement by fast response pressure-sensitive paint during shock wave passage

IF 1.8 4区工程技术 Q3 MECHANICS

Shock Waves Pub Date : 2025-03-24 DOI:10.1007/s00193-025-01221-9

T. Ikami, J. Abe, S. Tamakuma, S. Takahashi, H. Nagai

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引用次数: 0

Abstract

The interaction between a shock wave and an object causes an impulsive force on the object that lasts for a very short time on the order of milliseconds. This study proposes impulsive force measurements using anodized aluminum pressure-sensitive paint (AA-PSP), which is an optical pressure measurement technique. The response time of AA-PSP is on the order of microseconds, indicating the potential for fast pressure drag measurements by integrating the pressure distribution on the surface. In this study, at first, the response time of the fabricated AA-PSP is measured and determined to be \(3.3~\upmu \hbox {s}\). A cylindrical model coated with the AA-PSP is installed at the outlet of a shock tube, and the surface pressure is measured in order to calculate the pressure drag with a time resolution of \(10~\upmu \hbox {s}\). The experimental results are compared with an Euler CFD simulation computed using an in-house code. The maximum pressure drag in the numerical result exceeds that in the experimental result; however, the maximum pressure drag timings are in good quantitative agreement. In addition to measuring the impulsive force, the AA-PSP results allow for the visualization of complex flow phenomena, such as diffraction and decay in the shock wave strength. This simultaneous measurement of the flow field and impulsive forces can deepen the understanding of the relationship between them.

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用快速响应压敏涂料测量激波通过时的冲激力

冲击波和物体之间的相互作用会对物体产生一个脉冲力，这种脉冲力会持续很短的时间，大约在几毫秒左右。本研究提出利用阳极氧化铝压敏涂料（AA-PSP）进行脉冲力测量，这是一种光学压力测量技术。AA-PSP的响应时间在微秒量级，表明了通过整合表面压力分布来快速测量压力阻力的潜力。在本研究中，首先测量了制备的AA-PSP的响应时间，并确定其为\(3.3~\upmu \hbox {s}\)。在激波管出口安装涂有AA-PSP的圆柱形模型，测量表面压力，计算压力阻力，时间分辨率为\(10~\upmu \hbox {s}\)。实验结果与内部代码计算的欧拉CFD模拟结果进行了比较。数值结果的最大压力阻力大于实验结果；然而，最大压力阻力时间是在很好的定量一致。除了测量脉冲力外，AA-PSP结果还允许可视化复杂的流动现象，例如激波强度的衍射和衰减。这种流场和冲力的同时测量可以加深对它们之间关系的理解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Shock Waves 物理-力学

CiteScore

4.10

自引率

9.10%

发文量

审稿时长

17.4 months

期刊介绍： Shock Waves provides a forum for presenting and discussing new results in all fields where shock and detonation phenomena play a role. The journal addresses physicists, engineers and applied mathematicians working on theoretical, experimental or numerical issues, including diagnostics and flow visualization. The research fields considered include, but are not limited to, aero- and gas dynamics, acoustics, physical chemistry, condensed matter and plasmas, with applications encompassing materials sciences, space sciences, geosciences, life sciences and medicine. Of particular interest are contributions which provide insights into fundamental aspects of the techniques that are relevant to more than one specific research community. The journal publishes scholarly research papers, invited review articles and short notes, as well as comments on papers already published in this journal. Occasionally concise meeting reports of interest to the Shock Waves community are published.