Results 41 to 50 of about 61,190 (204)
Energy Science & Engineering, 2022 The aim of this paper is to analyze local autoignition induced by secondary flame acceleration. The secondary flame acceleration process and the local autoignition formation mechanism at the condition of the secondary flame acceleration propagation were ...
Yangyang Yu +3 more
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A mean value model for estimation of laminar and turbulent flame speed in spark-ignition engine
, 2015 Flame velocity is the main parameter for determination of combustion propagation in a spark-ignition engine. The first part of combustion that consists of flame initiation and flame kernel growth has laminar velocity.
A. Ghanaati +3 more
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Applications in Energy and Combustion Science, 2023 Ammonia, an efficient hydrogen carrier, is crucial for achieving net-zero emissions. However, its low reactivity, as manifested through small unstretched laminar flame speed (SL,0 ∼ 7 cm/s) and large laminar flame thickness (δL ∼ 2.85 mm) at atmospheric ...
S.S. Shy +3 more
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Effciently generated turbulence for an increased flame speed [PDF]
, 2014 The rate of combustion in premixed flames is to a large extent controlled by the level of turbulence. Fluctuations in the flow field deform the flame front that exists between the premixed reactants and the fully combusted products. The surface area of this flame front is increased as it becomes more wrinkled by the turbulent flow, which increases the ...
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Turbulent flame speed of thermodiffusively unstable flames: experimental investigation and scaling
, 2023 This work presents an experimental set of Bunsen flames characterized by a moderate Reynolds number and a variable turbulence intensity. Ten lean hydrogen-enriched methane-air mixtures at three levels of turbulence are investigated, ranging from pure methane-air to pure hydrogen-air.
Troiani, Guido +3 more
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Volume 3A: Combustion, Fuels, and Emissions, 2023 Abstract Carbon dioxide emissions in gas turbine power generation can be reduced by adding an increasing amount of hydrogen to the existing natural gas-fueled combustion systems. To enable safe operation, more insight on how H2 addition affects turbulent flame speed and other important flame characteristics is needed.
Filippo Faldella +4 more
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Model constant C of turbulent NO reaction time model
Case Studies in Thermal Engineering, 2017 The NO concentration of turbulent jet flames with different fuel, jet velocity, and jet diameter are simulated with the turbulent NO reaction time model. The predicted NO profile has very good agreement with the experimental data.
Qiong Li, Yuexinzhu Lan, Peiyong Wang
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Combustion Science and Technology, 2023 This study investigates turbulent flame speed and turbulent Markstein length using analytic and numerical methods. Using asymptotic analysis on harmonically oscillating flames, explicit expressions for the un-stretched turbulent flame speed and the turbulent Markstein length are derived.
Sohn, Jungho +2 more
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Energy and AI, 2023 Flame front structure is one of the most fundamental characteristics and, hence, vital for understanding combustion processes. Measuring flame front structure in turbulent flames usually needs laser-based diagnostic techniques, mostly planar laser ...
Lei Han +6 more
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Journal of Thermal Science and TechnologyThe local burning velocity and flame displacement speed are the major properties of premixed flames. The local burning velocity, which is the instantaneous quantity based on the local consumption rate of the unburnt mixture, is considered to be the most ...
Kazuya TSUBOI
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