Research on filling process of fuel and oxidant during detonation based on absorption spectrum technology

Xiao-Jing Lv; Ning Li; Chun-Sheng Weng

doi:10.1117/12.2071439

3 December 2014 Research on filling process of fuel and oxidant during detonation based on absorption spectrum technology

Xiao-Jing Lv, Ning Li, Chun-Sheng Weng

Author Affiliations +

Proceedings Volume 9297, International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors; 92970V (2014) https://doi.org/10.1117/12.2071439
Event: International Symposium on Optoelectronic Technology and Application 2014, 2014, Beijing, China

Abstract

Research on detonation process is of great significance for the control optimization of pulse detonation engine. Based on absorption spectrum technology, the filling process of fresh fuel and oxidant during detonation is researched. As one of the most important products, H₂O is selected as the target of detonation diagnosis. Fiber distributed detonation test system is designed to enable the detonation diagnosis under adverse conditions in detonation process. The test system is verified to be reliable. Laser signals at different working frequency (5Hz, 10Hz and 20Hz) are detected. Change of relative laser intensity in one detonation circle is analyzed. The duration of filling process is inferred from the change of laser intensity, which is about 100~110ms. The peak of absorption spectrum is used to present the concentration of H₂O during the filling process of fresh fuel and oxidant. Absorption spectrum is calculated, and the change of absorption peak is analyzed. Duration of filling process calculated with absorption peak consisted with the result inferred from the change of relative laser intensity. The pulse detonation engine worked normally and obtained the maximum thrust at 10Hz under experiment conditions. The results are verified through H₂O gas concentration monitoring during detonation.

Citation Download Citation

Xiao-Jing Lv, Ning Li, and Chun-Sheng Weng "Research on filling process of fuel and oxidant during detonation based on absorption spectrum technology", Proc. SPIE 9297, International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors, 92970V (3 December 2014); https://doi.org/10.1117/12.2071439

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