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Abstract <p>The thermal processes accompanying the unsteady interaction between a plane shock wave with the Mach numbers 2.0 to 4.5 and a blunt cylinder is experimentally investigated in the test section of the channel of a shock tube. The relationship between the gasdynamic and thermal processes in the stages of shock wave diffraction and the cocurrent flow past the model and the channel walls is established on the basis of high-speed shadowgraphy (150 000 frames per sec) and infrared thermography (1.5 to 2.8 μm). It is shown that the time of recording infrared radiation from the inner quartz channel walls in the complicated unsteady flow is not greater than 500 to 700&#xa0;μs and that of radiation from the surface of the cylinder model in flow is not greater than 40&#xa0;ms.</p>

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Gasdynamic and Thermal Processes Accompanying the Unsteady Interaction of a Shock Wave with a Blunt Cylinder in a Channel

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • E. A. Karnozova,
  • I. A. Znamenskaya,
  • V. V. Gubanov,
  • A. A. Filatov,
  • T. A. Kuli-Zade,
  • N. N. Sysoev

摘要

Abstract

The thermal processes accompanying the unsteady interaction between a plane shock wave with the Mach numbers 2.0 to 4.5 and a blunt cylinder is experimentally investigated in the test section of the channel of a shock tube. The relationship between the gasdynamic and thermal processes in the stages of shock wave diffraction and the cocurrent flow past the model and the channel walls is established on the basis of high-speed shadowgraphy (150 000 frames per sec) and infrared thermography (1.5 to 2.8 μm). It is shown that the time of recording infrared radiation from the inner quartz channel walls in the complicated unsteady flow is not greater than 500 to 700 μs and that of radiation from the surface of the cylinder model in flow is not greater than 40 ms.