Enthalpy probe for obtaining enthalpy values of high-enthalpy flow fields based on optical methods

Abstract

The application discloses an enthalpy probe for obtaining high-enthalpy flow field enthalpy based on an optical method and an application method, comprising a probe head; a pressure measuring module in communication with an external pressure sensor is arranged on a central axis of the probe head; a temperature measuring module for measuring total temperature of a flow field is arranged on one side of the pressure measuring module; the temperature measuring module comprises a light guiding channel with a predetermined inclination angle in space with a pressure measuring channel of the pressure measuring module, so as to align an observation point with a shock layer of a head of the probe head; a fiber type collimator is arranged in an inner shell and cooperates with the light guiding channel. The application provides an enthalpy probe for obtaining high-enthalpy flow field enthalpy based on an optical method and an application method, stable total pressure and radiation spectrum of a flow field are obtained by staying in the flow field for several seconds, then total temperature of the flow field is obtained through atomic spectral lines in the radiation spectrum, and the flow field enthalpy is calculated based on the total temperature and the total pressure through balanced chemical reactions, the two kinds of measurements are integrated, and the embedded measurement mode meets the use requirements.

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