Ignition and Combustion Characterization of Hydrogen/Methane Mixtures by Visualization in a Rapid Compression Machine (RCM)

Saanum, Inge; Bysveen, Marie; Almås, Terje; Sønju, O. K.

doi:10.4271/2005-24-009

Cited by 2 publications

(2 citation statements)

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“…The timing and capacity of the servo valves and hydraulic accumulators used to actuate and control this can therefore influence performance. As a result, slower compression times have generally been reported for hydraulically-driven machines, e.g., 40-60 ms [112,113].…”

Section: Control Of the Compression Phasementioning

confidence: 99%

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Advances in rapid compression machine studies of low- and intermediate-temperature autoignition phenomena

Goldsborough

Hochgreb

Vanhove

et al. 2017

Progress in Energy and Combustion Science

206

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Rapid compression machines (RCMs) are widely-used to acquire experimental insights into fuel autoignition and pollutant formation chemistry, especially at conditions relevant to current and future combustion technologies. RCM studies emphasize important experimental regimes, characterized by lowto intermediate-temperatures (600-1200 K) and moderate to high pressures (5-80 bar). At these conditions, which are directly relevant to modern combustion schemes including low temperature combustion (LTC) for internal combustion engines and dry low emissions (DLE) for gas turbine engines, combustion chemistry exhibits complex and experimentally challenging behaviors such as the chemistry attributed to cool flame behavior and the negative temperature coefficient regime. Challenges for studying this regime include that experimental observations can be more sensitive to coupled physicalchemical processes leading to phenomena such as mixed deflagrative/autoignitive combustion. Experimental strategies which leverage the strengths of RCMs have been developed in recent years to make RCMs particularly well suited for elucidating LTC and DLE chemistry, as well as convolved physicalchemical processes. Specifically, this work presents a review of experimental and computational efforts applying RCMs to study autoignition phenomena, and the insights gained through these efforts. A brief history of RCM development is presented towards the steady improvement in design, characterization, instrumentation and data analysis. Novel experimental approaches and measurement techniques, coordinated with computational methods are described which have expanded the utility of RCMs beyond empirical studies of explosion limits to increasingly detailed understanding of autoignition chemistry and the role of physical-chemical interactions. Fundamental insight into the autoignition chemistry of specific fuels is described, demonstrating the extent of knowledge of low-temperature chemistry derived from RCM studies, from simple hydrocarbons to multi-component blends and full-boiling range fuels. Emerging needs and further opportunities are suggested, including investigations of under-explored fuels and the implementation of increasingly higher fidelity diagnostics.

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Section: Control Of the Compression Phasementioning

confidence: 99%

“…[205,206], and others have applied schlieren and shadowgraph methods to image fuel spray development in RCMs e.g. [112,[206][207][208] and engine knock phenomena e.g. [182,[209][210][211].…”

Section: Schlieren Techniquesmentioning

confidence: 99%