Time-frequency domain analysis study on dynamic response characteristics of kerosene-fueled scramjet combustor

Han, Xuli; Li, Huacong; Jia, Qiusheng; Xiao, Hongliang; Fu, Qiang

doi:10.1109/icmae.2017.8038668

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…For scramjet engines, wall pressure is one of the most potential controlled parameters. The previous research results [12][13][14][15] shows that the thrust and fuel supply of the engine have a monotonic correspondence, and the wall pressure in some areas of the combustor also has a monotonic correspondence with the fuel supply. There are 330 mm, 350 mm and 370 mm wall pressure measuring points in this area.…”

Section: Analysis Of Wall Pressure Sensitivity At Different Positionsmentioning

confidence: 99%

Experimental study on dynamic characteristics of wall pressure in supersonic combustor of kerosene fuel

Jiao,

Song,

Zeng

2024

J. Phys.: Conf. Ser.

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In order to study the rationality and feasibility of kerosene-fueled supersonic combustor wall pressure as the controlled parameter of scramjet, a series of supersonic combustor ground direct-connected tests were carried out on the ground direct-connected test bench of Northwestern Polytechnical University. The test simulated the actual process of ignition and combustion in a double-cavities supersonic combustor under the conditions of inlet total pressure of 800 kPa and 900 kPa, total temperature of 810 K, and Mach number 2.0. The characteristics of pressure distribution and sensitivity on the wall of the combustor were measured and analyzed. The results show that the combustor wall pressure fluctuates obviously in steady state, and the fluctuation is positively correlated with the oil-gas ratio. The relative variation of wall pressure difference value and equivalent oil-gas ratio can reflect the sensitivity of wall pressure change under different oil-gas ratios. The wall sensitivity at X=370 mm is the largest, which is most suitable as the controlled parameter of the engine kerosene flow.

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Section: Analysis Of Wall Pressure Sensitivity At Different Positionsmentioning

confidence: 99%

Experimental study on dynamic characteristics of wall pressure in supersonic combustor of kerosene fuel

Jiao,

Song,

Zeng

2024

J. Phys.: Conf. Ser.

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Experimental and numerical investigations on controlled parameter selection methods for kerosene-fueled scramjet

Jiao,

Song,

Zeng

et al. 2024

International Journal of Turbo &Amp; Jet-Engines

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In order to determine the optimal wall pressure location as the controlled parameter for kerosene-fueled scramjet, a combined approach of numerical simulation and experimental analysis was employed. The results indicate that with an increase in the equivalence ratio of kerosene, the combustor exhibits consecutive modes, including pure scramjet mode, dual-mode scramjet mode, dual-mode ramjet mode, and pressure disturbance to the isolator inlet mode. The peak pressure ratios corresponding to the mode transition boundaries are 1.95, 3.26, and 3.57, with respective isolator outlet Mach numbers of 1.62, 1.0, and 0.74. The equivalence ratio corresponding to mode transition increases with an increase in the combustor inlet total temperature. Considering the dynamic characteristics of wall pressures at different locations, the position at x/L = 0.46 demonstrates the best linearity, highest sensitivity, and greater stability. Hence, it is the most suitable choice as the controlled parameter for fuel flow in this kerosene-fueled scramjet.

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Time-frequency domain analysis study on dynamic response characteristics of kerosene-fueled scramjet combustor

Cited by 2 publications

References 14 publications

Experimental study on dynamic characteristics of wall pressure in supersonic combustor of kerosene fuel

Experimental study on dynamic characteristics of wall pressure in supersonic combustor of kerosene fuel

Experimental and numerical investigations on controlled parameter selection methods for kerosene-fueled scramjet

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