Fundamental studies of cavity-based flameholder concepts for supersonic combustors

Gruber, Mark; Baurle, Robert A.; Mathur, Tarun; Hsu, Kuang–Yu

doi:10.2514/6.1999-2248

Cited by 59 publications

(66 citation statements)

References 30 publications

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“…Since a cavity is often used in a supersonic combustor for ignition and flame holding, a cavity with a length-to-height ratio of 5 in a Mach 3 supersonic flow is also calculated. Figure 1b shows the distribution of the calculated wall pressure compared with the result reported by Gruber et al (1999). The present numerical result agrees well with those of Gruber et al (1999).…”

Section: Methodssupporting

confidence: 80%

“…Figure 1b shows the distribution of the calculated wall pressure compared with the result reported by Gruber et al (1999). The present numerical result agrees well with those of Gruber et al (1999). The above two validations show that the present FANS simulations together with the turbulence model employed qualify for investigation of turbulent injection and mixing in a supersonic crossflow with a cavity.…”

Section: Methodssupporting

confidence: 77%

See 1 more Smart Citation

Numerical Simulation of Ignition and Combustion of Ethylene in a Supersonic Model Combustor with a Reduced Kinetic Mechanism

Zhong

Zhang

et al. 2013

Combustion Science and Technology

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Section: Methodssupporting

confidence: 80%

Section: Methodssupporting

confidence: 77%

Numerical Simulation of Ignition and Combustion of Ethylene in a Supersonic Model Combustor with a Reduced Kinetic Mechanism

Zhong

Zhang

et al. 2013

Combustion Science and Technology

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“…These pressure oscillations are responsible for the unstable flow over the cavity. In the case where the aft cavity wall is inclined, based on the open cavity, the flow over the cavity becomes steady although the drag is higher than a rectangular open cavity [39]. This is attributed to the higher pressures acting over a larger fraction of the aft wall.…”

Section: Introductionmentioning

confidence: 90%

Effectiveness of jet location on mixing characteristics inside a cavity in supersonic flow

Ukai

Zare‐Behtash

Erdem

et al. 2014

Experimental Thermal and Fluid Science

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“…The transverse jet has also been proposed as a means for fuel injection in high-speed air-breathing propulsion, i.e. SCRAMJETS (Gruber et al 1999). Buoyancy can be important to different degrees in the various applications of transverse jets; however, this study restricts its attention to momentum-driven jets in crossflow.…”

Section: Introductionmentioning

confidence: 99%

Reynolds-number effects and anisotropy in transverse-jet mixing

Shan

Dimotakis

2006

J. Fluid Mech.

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Experiments are described which measured concentration fields in liquid-phase strong transverse jets over the Reynolds-number range 1.0 × 10 3 6 Re j 6 20 × 10 3 . Laserinduced-fluorescence measurements were made of the jet-fluid-concentration fields at a jet-to-freestream velocity ratio of V r = 10. The concentration-field data for far-field (x/d j = 50) slices of the jet show that turbulent mixing in the transverse jet is Reynoldsnumber dependent over the range investigated, with a scalar-field PDF that evolves with Reynolds number. A growing peak in the PDF, indicating enhanced spatial homogenization of the jet-fluid concentration field, is found with increasing Reynolds number. Comparisons between transverse jets and jets discharging into quiescent reservoirs show that the transverse jet is an efficient mixer in that it entrains more fluid than the ordinary jet, yet is able to effectively mix and homogenize the additional entrained fluid. Analysis of the structure of the scalar field using distributions of scalar increments shows evidence for well-mixed plateaux separated by sharp cliffs in the jet-fluid concentration field, as previously shown in other flows. Furthermore, the scalar field is found to be anisotropic, even at small length scales. Evidence for local anisotropy is seen in the scalar power spectra, scalar microscales, and PDFs of scalar increments in different directions. The scalar-field anisotropy is shown to be correlated to the vortex-induced large-scale strain field of the transverse jet. These experiments add to the existing evidence that the large and small scales of high-Schmidt-number turbulent mixing flows can be linked, with attendant consequences for the universality of small scales of the scalar field for Reynolds numbers up to at least Re = 20 × 10 4 .

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Fundamental studies of cavity-based flameholder concepts for supersonic combustors

Cited by 59 publications

References 30 publications

Numerical Simulation of Ignition and Combustion of Ethylene in a Supersonic Model Combustor with a Reduced Kinetic Mechanism

Numerical Simulation of Ignition and Combustion of Ethylene in a Supersonic Model Combustor with a Reduced Kinetic Mechanism

Effectiveness of jet location on mixing characteristics inside a cavity in supersonic flow

Reynolds-number effects and anisotropy in transverse-jet mixing

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