Micro leakage diagnosis system of cooling water of arc heater

Abstract

The invention discloses a micro leakage diagnosis system of cooling water of an arc heater. The system comprises an arc heater, a radiation measurement clamping piece, a jet pipe and a data processingunit; the arc heater and the radiation measurement clamping piece collect high-temperature gas radiation luminescence in an arc chamber of the arc heater; and high temperature gas radiation luminescence collected by the radiation measurement clamping piece enters a Y-shaped quartz fiber divided into two paths, pass two narrowband filter plates in different central wavelengths, and then transmitted to two photomultipliers respectively, after photoelectric conversion by the photomultipliers, a narrowband radiation signal is converted into the voltage signal, the voltage signal is transmitted toa data processing unit for analysis, and real-time output voltage values of the two photomultipliers are obtained. Thus, micro water leakage of the arc heater can be diagnosed rapidly and accurately,and the running safety of equipment is improved greatly.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of aircraft ground aerodynamic thermal test research, in particular to a micro-leakage diagnosis system for arc heater cooling water. Background technique [0002] The arc heater can reproduce the main thermal parameters (total enthalpy, heat flow, etc.) of the aircraft during high-speed flight. Since the 1950s, it has been the preferred test equipment for the screening of heat-resistant materials and the assessment of thermal protection systems for hypersonic aircraft. The arc heater generates an arc and heats the test gas through the high voltage applied to both ends of the electrode. Due to the combined effect of the huge heat flow generated by the high voltage and high current on the electrode and the high temperature gas flushing in the heater, it will inevitably lead to arc heating. The ablation of the device electrode and its metal parts. In order to improve the working reli...

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Problems solved by technology

[0005] For this reason, the embodiment of the present invention provides a micro-leakage diagnosis system for arc heater cooling water. The diagnosis system for arc heater cooling water micro-leakage is accurate, fast response, high sensitivity, and low cost, which can solve the current micro-leakage of arc heaters. Quick and accurate diagnosis when it occurs, greatly improving the safety of equipment operation

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