Megahertz-rate OH planar laser-induced fluorescence imaging in a rotating detonation combustor

Hsu, Paul S.; Slipchenko, Mikhail N.; Jiang, Naibo; Fugger, Christopher A.; Webb, Austin M.; Athmanathan, Venkat; Meyer, Terrence R.; Roy, Sukesh

doi:10.1364/ol.403199

Cited by 43 publications

(2 citation statements)

References 15 publications

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“…A study by Athmanathan et al [139] demonstrated the capability of time resolved chemiluminescence method to study the evolution of detonation structure and its relationship with oxidizer mass flux. Similar techniques were used by [140] and [141] as well, to investigate the detonation wave structureClick or tap here to enter text.. Planar laser induced fluorescence imaging techniques were also used by [142] and [143], which can study the spatiotemporal evolution of the flow structures in the recirculation and combustion products zone. Rein et al [144] used laser absorption spectroscopy of H2O vapor to study the RDE combustion.…”

Section: Combustion Diagnosis Of Rdesmentioning

confidence: 99%

A Review of Pressure Gain Combustion Solutions for Aerospace Propulsion

Purushothaman

Renuke

Sorce

et al. 2022

Volume 4: Cycle Innovations; Cycle Innovations: Energy Storage

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Recent developments in Pressure Gain Combustion (PGC) technology have demonstrated its ability to achieve higher thermal efficiencies and lower carbon emissions as compared to conventional gas turbine counterpart working in Brayton cycle. Ongoing studies suggest the possibility of implementing PGC in aircraft engines by replacing the high-pressure section (HP compressor, combustion chamber and HP turbine) with a PGC system. This, coupled with research on advanced materials and cooling solutions, offers the potential for higher overall gas turbine efficiency and fuel economy, contributing towards emission reduction of the aviation sector. This paper aims at a comprehensive review of PGC technology solutions applied in the area of aero propulsion. Reported background covers the historic as well as ongoing research activities at the component level, the cycle level, and the propulsion application of Pulse Detonation Engine (PDE), Rotating Detonation Engine (RDE), Oblique Detonation Wave Engine (ODWE), Free Piston Composite Cycle Engine (FP-CCE), and wave rotor engines. The analytical, numerical, and experimental research work is reviewed, providing also a comparison of PGC engine conceptual designs with existing gas turbine engines used in aerospace propulsion.

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Section: Combustion Diagnosis Of Rdesmentioning

confidence: 99%

A Review of Pressure Gain Combustion Solutions for Aerospace Propulsion

Purushothaman

Renuke

Sorce

et al. 2022

Volume 4: Cycle Innovations; Cycle Innovations: Energy Storage

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“…The measurement of flame front position relies on laser based optical diagnostics techniques. The laser induced fluorescence (LIF) signal from radicals such as OH and CH, which are generated during combustion, is frequently used for flame front tracking [4][5][6][7]. Another common approach adapts particle image velocimetry (PIV, also called Conditioned PIV when it was first proposed for flame front extractions and in some later publications) [8,9].…”

mentioning

confidence: 99%

Simultaneous two-plane flame front detection using PIV based on defocusing

He,

Willman,

Williams

2024

Opt. Lett.

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This Letter presents a simultaneous two-plane flame front detection method. It is based on a standard single-camera single-plane particle image velocimetry (PIV) system in combination with an inexpensive and compact image splitting device. The image splitting optics places images from two depth-offset planes onto the two halves of a camera sensor. A shallow depth of field ensures only one plane is in focus on each half of the sensor. By using a high-pass filter and a novel two-step filter we have devised, the out-of-focus particle images are effectively removed, while the in-focus particle images remain, allowing the turbulent flame fronts on two planes to be detected simultaneously. Our approach could be combined with conventional polarization/wavelength discrimination methods to achieve simultaneous multi-plane flame front reconstruction with similarly high in-plane spatial resolution to single-plane measurement and is suitable for practical combustion devices with limited optical access.

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