Photoelectric flame velocity measurement system and method

By integrating photoelectric and ionic signal speed measurement systems and combining pressure sensors to calculate time difference, the accurate measurement problem of flame propagation speed in high-speed flame combustion chambers is solved, achieving higher measurement accuracy and flexibility, and is suitable for a variety of combustion chamber environments.

CN120254327APending Publication Date: 2025-07-04PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV +1
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Patent Information

Application Number
CN202510267739.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-07
Publication Date
2025-07-04

AI Technical Summary

Technical Problem

In the prior art, in high-speed flame combustion chambers, optical signal measurements are easily triggered in advance, while ion signal measurements will invade the combustion chamber and affect the experiment, resulting in measurement errors and inaccuracies, making it difficult to accurately measure the flame propagation speed.

Method used

An integrated photoelectric flame speed measurement system is adopted, including a photoelectric flame speed measurement module, an ion probe flame speed measurement module and a data acquisition system. Combined with optical signal and ion signal measurement, the time difference is obtained through the pressure sensor, and the length of the induction zone and reaction zone are calculated to achieve accurate measurement of flame speed.

Benefits of technology

By integrating photoelectric and ionic signal measurements, errors are reduced when used alone, and greater measurement accuracy and flexibility are available, and can be used in a variety of combustion chamber environments. It is simple to operate and does not require a lot of correction work.

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Abstract

The invention discloses a photoelectric flame velocity measurement system and method. The photoelectric flame velocity measurement system comprises a photoelectric flame velocity measurement module, an ion probe flame velocity measurement module, a pressure sensor and a data acquisition system, the photoelectric flame velocity measurement module comprises two optical fiber probes arranged along the flame propagation direction; the ion probe flame velocity measurement module comprises two ion probes arranged along the flame propagation direction; the two optical fiber probes and the two ion probes are connected with a data acquisition system; and the pressure sensor and one ion probe A are arranged on the same cross section. The device integrates optical signal detection and ion signal detection, has the advantages of the two detection modes, can prevent special condition errors and mutual backup caused by independent use of the two measurement modes through integration, is simple to operate, and does not need a large amount of correction work; and the length of an induction zone and the length of a reaction zone in detonation combustion can be directly measured.
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