12 May 2017 Application of the hydroxyl tagging velocimetry to direct-connect supersonic combustor experiment
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Proceedings Volume 10173, Fourth International Symposium on Laser Interaction with Matter; 1017314 (2017) https://doi.org/10.1117/12.2268256
Event: 4th International Symposium on Laser Interaction with Matter, 2016, Chengdu, China
Abstract
For the purpose of measuring the flow velocity in a scramjet test model, an special designed measurement system was established, including the strong vibration suppression, optical transport consideration, the movable device etc. The interference of the strong vibration to the velocity measurements was avoided by two ICCD cameras capturing the reference tag lines image and moved tag lines image together during an experiment. According to the tag lines image feature, data processing including correlation algorithm, data fitting by a Gauss function were used respectively to extract the positions of the reference tag lines and the moved tag lines. The velocity measurements were carried out at the isolation section and the cavity section. The results showed that the well SNR could be achieved in the H2/air combustion heating flow, but in the kerosene fuel combustion flow, the measurements images might be interfered by the strong OH background from the chemical reaction, and the signal intensity could be reduced due to the tag laser attenuation through the absorption by kerosene vapor. But when the combustor model was run at a low chemical equivalent, the interference could be suppressed to an accepted level.
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Jingfeng Ye, Guohua Li, Jun Shao, Zhiyun Hu, Xinyan Zhao, WenYan Song, "Application of the hydroxyl tagging velocimetry to direct-connect supersonic combustor experiment", Proc. SPIE 10173, Fourth International Symposium on Laser Interaction with Matter, 1017314 (12 May 2017); doi: 10.1117/12.2268256; https://doi.org/10.1117/12.2268256
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