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A comparative study of constant-voltage and constant-temperature hot-wire anemometers in supersonic flow

机译:超声速恒流恒温热线风速仪的比较研究

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The static response of the constant-voltage anemometer (CVA) has been investigated analytically for both subsonic and supersonic flow. A corroborative experiment was performed at Mach 3.5 using both CVA and CTA systems. This experiment allowed a direct comparison of the static sensitivities of the two systems by utilizing the identical flow conditions and the same wire sensors. The subsonic analysis of the CVA indicates that the anemometer has primary sensitivity to velocity fluctuations at high overheat ratios and to temperature fluctuations at low overheat ratios. The theoretical and empirical relative static sensitivity of the CVA system to massflux and total-temperature variations appears very similar to that of the CTA and CCA systems over a wide range of overheat ratio.
机译:对于亚音速流和超音速流,均已对恒压风速计(CVA)的静态响应进行了分析研究。使用CVA和CTA系统以3.5马赫进行了确证实验。通过使用相同的流量条件和相同的线传感器,该实验可以直接比较两个系统的静态灵敏度。 CVA的亚音速分析表明,风速仪对高过热率下的速度波动和低过热率下的温度波动具有主要敏感性。在较大的过热比范围内,CVA系统对质量流量和总温度变化的理论和经验相对静态灵敏度似乎与CTA和CCA系统非常相似。

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