Turbulent mixing and trajectories of jets in a supersonic cross-flow with different injectants

Fries, Dan; Ranjan, Devesh; Menon, Suresh

doi:10.1017/jfm.2020.1065

Cited by 9 publications

(3 citation statements)

References 39 publications

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“…The main flow air supply is preheated Laser Spark Evolution in a Jet in Supersonic Crossflow this study. A more detailed facility description is also given by Fries et al (2021).…”

Section: Wind Tunnel Facilitymentioning

confidence: 99%

“…Inverse analysis of the governing equations accounts for variations in seeding density and seed particle size. This approach and its limitations are described in detail in Fries et al (2021). The particle Stokes number in our flow is St = 0.14 and illumination is provided by a pulsed 532 nm Nd:YAG laser with 30 mJ/pulse at 10 Hz.…”

Section: Mie-scattering and Particle Image Velocimetrymentioning

confidence: 99%

“…These contours are not necessarily the same as the corresponding mixture fraction contours. As discussed in Fries et al (2021), the jet fluid signal measurement is affected by the variable density of the compressible JISCF flow field. Thus, the pseudo contours should be considered only as a visual aid in the phenomenological interpretation of the results.…”

Section: Impact Of Dilatation and Mixing History On Ignition Kernel E...mentioning

confidence: 99%

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Laser Spark Evolution in an Ethylene Jet in Supersonic Crossflow Configuration

Fries

Ranjan

Menon

2022

Flow Turbulence Combust

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Ignition and relighting in supersonic flows is an important challenge for the design of hypersonic propulsion systems. Supersonic compressible flows of interest exhibit much larger local variations in velocity, shear, and thermodynamic state than their incompressible counterparts. Thus, it is of interest to study the relationship between ignition kernel evolution, the initial spark location, and the kernel's subsequent flow state history. We leverage the flexibility of a laser plasma ignition system to systematically explore a large set of spark locations on the symmetry plane of an ethylene jet in supersonic crossflow setup. CH* measurements are used to visualize chemically active regions and results are correlated with flow field properties derived from Mie-scattering data of the non-reacting flow field. Our study describes the laser plasma properties in detail and scrutinizes the effect of turbulent mixing and flow dilatation on ignition kernels. Finally, the results yield general guidelines for favorable ignition locations in the engineering design of chemically reactive compressible flows.

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“…The main flow air supply is preheated Laser Spark Evolution in a Jet in Supersonic Crossflow this study. A more detailed facility description is also given by Fries et al (2021).…”

Section: Wind Tunnel Facilitymentioning

confidence: 99%

Section: Mie-scattering and Particle Image Velocimetrymentioning

confidence: 99%

Section: Impact Of Dilatation and Mixing History On Ignition Kernel E...mentioning

confidence: 99%

See 1 more Smart Citation