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Matthew P. Ormsby

Bio: Matthew P. Ormsby is an academic researcher from University of Leeds. The author has contributed to research in topics: Turbulence. The author has an hindex of 1, co-authored 1 publications receiving 50 citations.
Topics: Turbulence

Papers
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Journal ArticleDOI
TL;DR: In this paper, high speed schlieren images were used to derive turbulent burning velocities of iso-octane air mixtures, and the results obtained in this study have been compared with those evaluated for a number turbulent burning velocity correlations and the differences are discussed.

62 citations


Cited by
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Journal ArticleDOI
TL;DR: A new high temperature, high Reynolds number, Reactor assisted Turbulent Slot (RATS) burner has been developed to investigate turbulent flame regimes and burning rates for large hydrocarbon transportation fuels, which exhibit strong low temperature chemistry behavior as discussed by the authors.

81 citations

Journal ArticleDOI
TL;DR: It is found that normalized turbulent flame speeds could be scaled by Re_{T,M}^{0.5} irrespective of the fuel, equivalence ratio, pressure, and turbulence intensity for positive Markstein number flames.
Abstract: In this paper we clarify the role of Markstein diffusivity, which is the product of the planar laminar flame speed and the Markstein length, on the turbulent flame speed and its scaling, based on experimental measurements on constant-pressure expanding turbulent flames. Turbulent flame propagation data are presented for premixed flames of mixtures of hydrogen, methane, ethylene, n-butane, and dimethyl ether with air, in near-isotropic turbulence in a dual-chamber, fan-stirred vessel. For each individual fuel-air mixture presented in this work and the recently published iso-octane data from Leeds, normalized turbulent flame speed data of individual fuel-air mixtures approximately follow a Re-T,f(0.5) scaling, for which the average radius is the length scale and thermal diffusivity is the transport property of the turbulence Reynolds number. At a given Re-T,Re-f, it is experimentally observed that the normalized turbulent flame speed decreases with increasing Markstein number, which could be explained by considering Markstein diffusivity as the leading dissipation mechanism for the large wave number flame surface fluctuations. Consequently, by replacing thermal diffusivity with the Markstein diffusivity in the turbulence Reynolds number definition above, it is found that normalized turbulent flame speeds could be scaled by Re-T,M(0.5) irrespective of the fuel, equivalence ratio, pressure, and turbulence intensity for positive Markstein number flames.

79 citations

Journal ArticleDOI
TL;DR: In this article, a laboratory-scale multiple-injector configuration is investigated, where the authors focus on the "light-around" mechanisms that intervene at the start, ensuring flame spreading from one injector to the next, eventually leading to established flames on each injector.

77 citations

Journal ArticleDOI
TL;DR: In this article, high-temperature/pressure turbulent burning velocities and their correlation of expanding unity-Lewis-number methane/air turbulent flames, propagating in near-isotropic turbulence in a large dual-chamber, constant-pressure/temperature, fan-stirred 3D cruciform bomb are reported.

54 citations

Journal ArticleDOI
TL;DR: In this paper, the authors established a computational fluid dynamics model and numerically investigated the mixture formation and combustion processes of a gasoline rotary engine enriched by the direct injected hydrogen at three injection positions.

52 citations