Continuous 500-Hz OH-PLIF Measurements in a Hydrogen-Fueled Scramjet Combustor
In recent years, significant research attention has focused on scramjet bench-testing using optical measurement techniques to obtain significant experimental data. The work aims to verify the environmental reliability of high-speed planar laser-induced fluorescence (PLIF) technique and satisfy bench...
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doaj-29410f01c84a446782f6ac1233ecea162020-11-25T02:13:21ZengFrontiers Media S.A.Frontiers in Physics2296-424X2020-04-01810.3389/fphy.2020.00101511629Continuous 500-Hz OH-PLIF Measurements in a Hydrogen-Fueled Scramjet CombustorJiangbo Peng0Jiangbo Peng1Zhen Cao2Zhen Cao3Xin Yu4Xin Yu5Shunhua Yang6Yang Yu7Yang Yu8Hongyu Ren9Shunping Zhang10Guang Chang11Guang Chang12Shuang Chen13Yanhui Zhao14Biao Yan15Biao Yan16Ye Luo17Ye Luo18National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, ChinaSchool of Astronautics, Harbin Institute of Technology, Harbin, ChinaNational Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, ChinaSchool of Astronautics, Harbin Institute of Technology, Harbin, ChinaNational Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, ChinaSchool of Astronautics, Harbin Institute of Technology, Harbin, ChinaChina Aerodynamics Research and Development Center, Mianyang, ChinaNational Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, ChinaSchool of Astronautics, Harbin Institute of Technology, Harbin, ChinaChina Aerodynamics Research and Development Center, Mianyang, ChinaChina Aerodynamics Research and Development Center, Mianyang, ChinaNational Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, ChinaSchool of Astronautics, Harbin Institute of Technology, Harbin, ChinaChina Aerodynamics Research and Development Center, Mianyang, ChinaChina Aerodynamics Research and Development Center, Mianyang, ChinaNational Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, ChinaSchool of Astronautics, Harbin Institute of Technology, Harbin, ChinaNational Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, ChinaSchool of Astronautics, Harbin Institute of Technology, Harbin, ChinaIn recent years, significant research attention has focused on scramjet bench-testing using optical measurement techniques to obtain significant experimental data. The work aims to verify the environmental reliability of high-speed planar laser-induced fluorescence (PLIF) technique and satisfy bench-test requirements. A high-speed OH-PLIF system with ~1.8 mJ/pulse at 500 Hz is developed, and tests are conducted at a direct-connect supersonic combustion facility. In this paper, OH-PLIF signals and pressure were measured simultaneously, and flame dynamics during pressure buildup were investigated, with a special focus on the ignition and flameout processes. In addition, the flame trajectory of the ignition process is depicted. The results show that the time scale of flame development is consistent with that of pressure stability, whereas the pressure change lags the change in flame intensity. The flame structure is discussed in both scramjet and ramjet modes. An unstable flame structure develops in the ramjet mode, and the flame area decreases similarly in both combustion modes. Flame oscillations are captured for three hydrogen equivalence ratios.https://www.frontiersin.org/article/10.3389/fphy.2020.00101/fullsupersonic combustionhigh-speed PLIF techniqueflame evolutionoscillationsscramjet |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jiangbo Peng Jiangbo Peng Zhen Cao Zhen Cao Xin Yu Xin Yu Shunhua Yang Yang Yu Yang Yu Hongyu Ren Shunping Zhang Guang Chang Guang Chang Shuang Chen Yanhui Zhao Biao Yan Biao Yan Ye Luo Ye Luo |
spellingShingle |
Jiangbo Peng Jiangbo Peng Zhen Cao Zhen Cao Xin Yu Xin Yu Shunhua Yang Yang Yu Yang Yu Hongyu Ren Shunping Zhang Guang Chang Guang Chang Shuang Chen Yanhui Zhao Biao Yan Biao Yan Ye Luo Ye Luo Continuous 500-Hz OH-PLIF Measurements in a Hydrogen-Fueled Scramjet Combustor Frontiers in Physics supersonic combustion high-speed PLIF technique flame evolution oscillations scramjet |
author_facet |
Jiangbo Peng Jiangbo Peng Zhen Cao Zhen Cao Xin Yu Xin Yu Shunhua Yang Yang Yu Yang Yu Hongyu Ren Shunping Zhang Guang Chang Guang Chang Shuang Chen Yanhui Zhao Biao Yan Biao Yan Ye Luo Ye Luo |
author_sort |
Jiangbo Peng |
title |
Continuous 500-Hz OH-PLIF Measurements in a Hydrogen-Fueled Scramjet Combustor |
title_short |
Continuous 500-Hz OH-PLIF Measurements in a Hydrogen-Fueled Scramjet Combustor |
title_full |
Continuous 500-Hz OH-PLIF Measurements in a Hydrogen-Fueled Scramjet Combustor |
title_fullStr |
Continuous 500-Hz OH-PLIF Measurements in a Hydrogen-Fueled Scramjet Combustor |
title_full_unstemmed |
Continuous 500-Hz OH-PLIF Measurements in a Hydrogen-Fueled Scramjet Combustor |
title_sort |
continuous 500-hz oh-plif measurements in a hydrogen-fueled scramjet combustor |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Physics |
issn |
2296-424X |
publishDate |
2020-04-01 |
description |
In recent years, significant research attention has focused on scramjet bench-testing using optical measurement techniques to obtain significant experimental data. The work aims to verify the environmental reliability of high-speed planar laser-induced fluorescence (PLIF) technique and satisfy bench-test requirements. A high-speed OH-PLIF system with ~1.8 mJ/pulse at 500 Hz is developed, and tests are conducted at a direct-connect supersonic combustion facility. In this paper, OH-PLIF signals and pressure were measured simultaneously, and flame dynamics during pressure buildup were investigated, with a special focus on the ignition and flameout processes. In addition, the flame trajectory of the ignition process is depicted. The results show that the time scale of flame development is consistent with that of pressure stability, whereas the pressure change lags the change in flame intensity. The flame structure is discussed in both scramjet and ramjet modes. An unstable flame structure develops in the ramjet mode, and the flame area decreases similarly in both combustion modes. Flame oscillations are captured for three hydrogen equivalence ratios. |
topic |
supersonic combustion high-speed PLIF technique flame evolution oscillations scramjet |
url |
https://www.frontiersin.org/article/10.3389/fphy.2020.00101/full |
work_keys_str_mv |
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