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An experimental investigation towards calibration of a shock tube and stagnation heat flux determination

机译：抗震管校准和停滞热通量测定的实验研究

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>This paper aims at comprehensive investigations towards design and installation of a moderate size shock tube (7 m long having an inner diameter of 55 mm, 20 mm thickness) and its experimental calibration through comparative parametric study. Necessary instrumentations are incorporated for measuring shock speeds and pressure rise across primary as well as reflected shock, obtained using nitrogen/helium as driver gas. The experimental evidence shows reasonable agreement between theoretical (one-dimensional shock tube relations) results. Further, an E-type coaxial surface junction thermocouple (CSJT) has been prepared in the laboratory and oil-bath calibration experiment gives its 'sensitivity'. Measurement of instantaneous surface temperature rise and subsequent stagnation heat flux are obtained using CSJT mounted on a specially-designed end-flange. The thermocouple noted a maximum rise of temperature of 7,800 K, marked as a characteristic constant of the sensor; since it is found to be independent of the magnitude of the step change in temperature.
机译：>本文旨在朝着设计和安装适度尺寸的冲击管（7米长的内径为55毫米，20mm，厚度为55毫米）的综合调查及其通过比较参数研究的实验校准。掺入必要的仪器，用于测量初级和反射冲击的冲击速度和压力升高，使用氮/氦作为驱动气体获得。实验证据显示理论（一维冲击管关系）结果之间的合理一致。此外，在实验室和油浴校准实验中制备了E型同轴表面结热电偶（CSJT），可以提供其“敏感性”。使用安装在特定设计的端部法兰上的CSJT获得瞬时表面温度升高和随后的停滞热通量的测量。热电偶注意到温度的最大升高为7,800 k，标记为传感器的特征常数;由于发现与温度变化的幅度无关。

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