Measurement system and heat release control method

Abstract

The present invention provide a measurement system and a heat release control method, the measurement system includes an optical signal acquisition module, a photoelectric amplification and mode-electro conversion module and a signal processing module which are sequentially connected in series; wherein the optical signal acquisition module is used to receive an optical signal spontaneously radiated from a combustion chamber by distributed optical fiber and send the optical signal to the photoelectric amplification and mode-electro conversion module, the photoelectric amplification and mode-electro conversion module is used to selectively amplify the wavelength of the received optical signal, convert the optical signal into a voltage signal, and send the voltage signal to the signal processing module; the signal processing module is configured to perform operation processing on the received voltage signal to obtain heat release rate, equivalence ratio distribution, and flame front position. The measurement system can monitor the continuous combustion flame front position after successful ignition, the local equivalence ratio distribution after the successful ignition, and the changeof the heat release rate after the successful ignition.

Description

technical field [0001] Embodiments of the present invention relate to the field of measurement and control of a combustion chamber of an aerospace power propulsion device, and in particular to a measurement system and a heat release control method. Background technique [0002] The time scale of combustion flow and chemical reaction process in aerospace power propulsion devices, such as scramjet engines, is very short. Applicable sensors and measurement methods need to have fast time response characteristics. If intrusive measurement is used, the flow characteristics will be changed, so it is necessary to develop Fast-response non-intrusive optical measurement method. Non-invasive optical measurement usually requires an optical quartz window on the engine. However, under high temperature and high pressure conditions, the refractive index of the window will change, which will cause deviations in the measurement results, and local thermal stress can cause damage to the window,...

AI Technical Summary

Problems solved by technology

Non-invasive optical measurement usually requires opening an optical quartz window on the engine. However, under high temperature and high pressure conditions, the refractive index of the window will change, which will cause deviations in the measurement results, and local thermal stress can cause damage to the window, accompanied by high temperature and high pressure sealing technology problems

[0003] Therefore, in the harsh high-temperature and high-pressure environment of the combustion chamber of aerospace power propulsion devices, traditional measurement methods are not easy to deploy in the combustion chamber and achieve effective and accurate measurement

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