Results 21 to 30 of about 539 (136)

Markstein numbers and unstretched laminar burning velocities of wet carbon monoxide flames [PDF]

34th Aerospace Sciences Meeting and Exhibit, 1996
Effects of positive flame stretch on the laminar burning velocities of wet carbon-monoxide/air flames at normal temperature and pressure were studied both experimentally and computationally. Measurements and numerical simulations considered outwardly-propagating spherical laminar premixed flames having both stable and unstable preferential-diffusion ...
Hassan, M. I., Aung, K. T., Faeth, Gerard M.   +2 more
openaire   +1 more source

Effect of Hydrogen Content and Dilution on Laminar Burning Velocity and Stability Characteristics of Producer Gas‐Air Mixtures

Journal of Combustion, Volume 2008, Issue 1, 2008., 2008
Producer gas is one of the promising alternative fuels with typical constituents of H2, CO, CH4, N2, and CO2. The laminar burning velocity of producer gas was computed for a wide range of operating conditions. Flame stability due to preferential diffusional effects was also investigated. Computations were carried out for spherical outwardly propagating
V. Ratna Kishore, M. R. Ravi, Anjan Ray, Lea-Der Chen   +3 more
wiley   +1 more source

Flame acceleration in unconfined lean hydrogen-oxygen mixtures using a hemispherical soap bubble method

Green Energy and Resources
This study investigates the flame acceleration dynamics in lean hydrogen-oxygen mixtures, focusing on critical parameters such as Péclet number, Markstein number, and the acceleration exponent.
Wookyung Kim, Keita Tanaka, Akihiro Ueda, Sushil Raut, Yangkyun Kim, Hongliang Luo   +5 more
doaj   +1 more source

Impacts of the Lewis and Markstein numbers on premixed flame acceleration in channels due to wall friction

Physics of Fluids, 2022
The effects of flame stretch as well as that of thermal and molecular diffusion on the scenario of flame acceleration in channels are quantified by means of computational and analytical endeavors. The analytical formulation incorporates the internal transport flame properties into the theory of flame acceleration due to wall friction by means of the ...
Serdar Bilgili, Vitaly Bychkov, V'yacheslav Akkerman   +2 more
openaire   +2 more sources

Relative impact of native and non‐native plants on endangered species in a major European City

Journal of Applied Ecology, Volume 63, Issue 1, January 2026.
This first city‐wide assessment of threats to multiple populations of endangered plant species provides a foundation for targeted threat management in urban contexts. Maintaining habitat quality and optimizing land use will be most effective in protecting endangered species from competitive pressures.
Ingo Kowarik, Valén Holle, Justus Meißner, Moritz von der Lippe   +3 more
wiley   +1 more source

Toward Personalized Stationary Chromatography Phases: Equipping Commercial Silica Phases with Selected Peptide‐Based Binding Domains to Tailor Affinity

Advanced Materials Interfaces, Volume 12, Issue 11, June 9, 2025.
The 7‐mer peptide motifs QFFLFFQ, QFFEFFQ, and QFQQSFF, known as good, medium, and poor binders for the photosensitizers m‐THPC and Chlorin E6 are covalently immobilized on commercial amino‐functionalized silica particles by inverse electron‐demand Diels‐Alder ligation.
Steffen A. Busche, Lukas D. Bangert, Raoul D. Brand, Tommy Kröger, Enrico Heyl, Hans G. Börner   +5 more
wiley   +1 more source

Laminar burning velocity and cellular instability of iso-octane/n-butanol/air flames at elevated pressures

Next Energy
As one of the most representative species of biomass-derived fuels, butanol is characterized by high energy density, which enables a long driving range and makes it favorable for blending with conventional petroleum-derived fuels during practical ...
Shanshan Chen, Yifan Du, Xiaoyu Guo
doaj   +1 more source

Detached Eddy Simulation (DES) of a Turbulent Premixed Flame Stabilized on a Bluff Body

Proceedings in Applied Mathematics and Mechanics, Volume 25, Issue 2, June 2025.
ABSTRACT As the demand for net‐zero emissions intensifies, low‐emission fuels (LEFs) are increasingly explored for their potential to reduce pollutants in combustion systems. The present study investigates the flame dynamics and pollutant emissions (CO and NOx) of different LEFs using detached eddy simulations (DES), a method that offers better ...
Abdelkader Hemaizia, Dominique Thévenin, Cheng Chi   +2 more
wiley   +1 more source

Numerical Simulations of Forced Ignition and Flame Dynamics in an Ammonia/Air Mixing Layer

Energies
This work explores NH3/air non-premixed combustion in a mixing layer, with the objective of quantifying the influence of key parameters on ignition and flame dynamics. A series of two-dimensional simulations were conducted with forced ignition.
Zhuchuan Chang, Haiou Wang, Kun Luo, Jianren Fan   +3 more
doaj   +1 more source

Navigating human–plant reciprocity: Commercial harvesting by professionals of a medicinal plant fosters multi‐actor landscape management

People and Nature, Volume 7, Issue 5, Page 1073-1085, May 2025.
Abstract Studies of human–nature relationships increasingly recognise not only nature's contributions to people but also the positive contributions of human practices to ecosystems. The concept of reciprocal contributions emphasises positive human–nature relationships. But trade‐offs between natural elements implies that human favouring of one element (
Jonathan Locqueville, Doyle McKey, Kenneth Iain MacDonald, Sylvain Coq, Sophie Caillon   +4 more
wiley   +1 more source