Optical Diagnostics and Numerical Characterization of a Trapped-Vortex Combustor

Meyer, Terrence R.; Brown, Michael S.; Fonov, Sergey; Goss, L. P.; Gord, James R.; Shouse, Dale T.; Belovich, Vincent; Roquemore, W. M.; Cooper, Clayton S.; Kim, E. S.; Haynes, J. M.

doi:10.2514/6.2002-3863

Cited by 29 publications

(4 citation statements)

References 3 publications

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“…High speed imaging of flames has been carried out by using a Phantom v7.2 high speed camera. This allows for visualization of the development of luminous flame structures [74]. Averages of these image sets have also been employed in this research to construct an average image of the flame shape and size.…”

Section: High Speed Imaging Of Flame Luminositymentioning

confidence: 99%

Pyrolysis oil combustion characteristics and exhaust emissions in a swirl-stabilized flame

Wissmiller¹

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Section: High Speed Imaging Of Flame Luminositymentioning

confidence: 99%

Pyrolysis oil combustion characteristics and exhaust emissions in a swirl-stabilized flame

Wissmiller¹

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“…This configuration employed struts to obtain better mixing in the mainstream. Meyer et al [3] and other similar inverstigations [4,5,6] conceptualised the TVC for an annular combustor. A two-dimensional, dual cavity rig was designed and tested.…”

Section: Introductionmentioning

confidence: 99%

Optical diagnostics of fuel–air mixing and vortex formation in a cavity combustor

Krishna

Ravikrishna

2015

Experimental Thermal and Fluid Science

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“…There is no doubt that the trapped vortex cavity has excellent flame stabilization ability, which effectively reduces pollutant emission [21,22]. Whereas, most research focuses on characteristics of the flow field in the cavity [23,24], fuel-air mixing [25], and combustion efficiency [26] at atmospheric pressure, while the high altitude status occupies the most part of operating range of the ramjet engine. Therefore, due to the absence of flame stabilization characteristics of TVC in high altitude status, the effect of inlet pressure on lean ignition and lean blowout limits need to be fully understood.…”

Section: Introductionmentioning

confidence: 99%

Inlet Pressure Effects on Subatmospheric Flame Stabilization with an Optimum Size of a Cavity-Based Combustor

Huang

Zhu³

et al. 2020

International Journal of Aerospace Engineering

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Experimental studies are conducted to find an optimum size of the cavity flameholder, which is a new combustion concept of a turbine-based combined-cycle (TBCC) engine with an excellent flame stabilization. Besides, the effect of inlet pressure on the subatmospheric performance is investigated. The experimental results indicate that the increase of the cavity length improves the flame stability with an enlarged fuel/air mixture residence time, which suggests that the big length-height ratio in a proper range of the cavity with a stable dual-vortex should be chosen when designing the cavity-based combustor. In addition, the decrease in lean ignition and the lean blowout equivalence ratios can be attributed by either increase in the inlet pressure and temperature or decrease in the Mach number. The increase in inlet pressure will lead to a linear decrease in the lean blowout equivalence ratio with a slope of 0.66 per 0.1 MPa, whereas the lean ignition equivalence ratio has a rapid drop with the increase of pressure from 0.06 MPa to 0.08 MPa and reduces slowly with the growth of pressure in the range of 0.08 MPa to 0.1 MPa. The detailed analysis of the flow field indicates that the characteristic time-scale theory can ideally explain and predict the change of flame stability in the trapped vortex cavity.

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Optical Diagnostics and Numerical Characterization of a Trapped-Vortex Combustor

Cited by 29 publications

References 3 publications

Pyrolysis oil combustion characteristics and exhaust emissions in a swirl-stabilized flame

Pyrolysis oil combustion characteristics and exhaust emissions in a swirl-stabilized flame

Optical diagnostics of fuel–air mixing and vortex formation in a cavity combustor

Inlet Pressure Effects on Subatmospheric Flame Stabilization with an Optimum Size of a Cavity-Based Combustor

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