Optical diagnostics in a detonation-driven direct-connected circular combustor fueled with hydrogen for mach 10 scramjet
| Autor: | Xu Zhang, Lianjie Yue, Jinping Li, Lin Xin, Xilong Yu, Zhang Shizhong, Gongxi Zhou, Hong Chen, Fei Li, Xiaoyuan Zhang |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Hydrogen Detonation Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences symbols.namesake Scramjet Aerospace engineering Computer simulation Renewable Energy Sustainability and the Environment business.industry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Boundary layer Fuel Technology Mach number chemistry symbols Combustor 0210 nano-technology business Tunable laser |
| Zdroj: | International Journal of Hydrogen Energy. 46:27801-27815 |
| ISSN: | 0360-3199 |
| Popis: | Various optical methods are applied to study flame characteristics of a circular-cross-section combustor for a Mach 10 scramjet. Experiments are performed on a direct-connected test facility fueled by hydrogen and driven using hydrogen/oxygen detonation. The circular-cross-section combustor is advantageous in solving thermal inhomogeneity, corner boundary layer and aircraft integration problems. However, it is difficult to use traditional optical measurement methods, which require large-sized measurement windows. In this study, tunable diode laser spectroscopy and a multi-view imaging system are used with small windows. High repetition rate measurements allow the effective time of facility, which is approximately 5 ms in this case, to be obtained. The dynamic flame characteristics are diagnosed upstream and downstream of the cavity with/without strut injection. When combined with proper orthogonal decomposition to obtain the flame pulsation state during the effective time period, the method is expected to be effective for engine performance evaluation and numerical simulation verification. |
| Databáze: | OpenAIRE |
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