Flame wall interaction
Jul 30, 2024 · WebJun 1, 2024 · The present work focuses on the flame–wall interaction (FWI) based on direct numerical simulations (DNS) of a head-on …
Flame wall interaction
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WebOct 1, 1993 · The interaction between turbulent premixed flames and walls is studied using a two-dimensional full Navier-Stokes solver with simple chemistry. The effects of wall distance on the local and global flame structure are investigated. WebSep 1, 2024 · The flame behaviour is first analysed by comparing the results to those observed for a steady 2D laminar flame interacting with the wall and a one-dimensional head-on quenching (HOQ) flame under ...
WebApr 1, 2024 · In the turbulent flame configuration, fluctuations prevail in the flame-wall interaction (FWI) zone which is associated with local flame curvature. Comparing the near-wall curvature for... WebApr 13, 2024 · In the present work, numerical simulations of premixed lean (equivalence ratio = 0.5) hydrogen-air flames in a 2 mm wide channel with three different wall materials (glass, steel, and aluminum) were performed. The effects of the wall material on the dynamics of the flames were extensively studied.
WebDue to the interaction between gas-phase O-2 and the polymer chain, it could lead to increasing random shearing and generating functional groups, which initiated depolarization. ... An, W.; Jiang, L.; Sun, J. Experimental study on fire risk of buildings’ U-shaped exterior wall on flame propagation of insulation material on plain and plateau ... WebAug 5, 2024 · The increasing demands for light-weight combustors make flame-wall interactions (FWI) inevitable, which influence the cooling load, thermal efficiency and pollutant emission in these applications. However, this aspect has not yet been sufficiently analysed in the existing turbulent reacting flow literature because of the challenge this …
WebSep 15, 2024 · The interaction of the flame with the combustion chamber wall plays a crucial role in the optimisation of spark ignition engines, since it significantly influences emissions as well as wall heat losses and thus the combustion efficiency.
WebMay 15, 2024 · In order to describe the position relationship of flame in the vicinity of the wall surface, the coordinate system was defined as follows: z -axis was the center axis of the flame, being positive in the upstream direction and zero at the wall surface. graphics manufacturerWebMar 29, 2024 · Flame-wall interactions also play a major role in the flashback phenomenon and thus in the stability of combustion [7]. The flame-wall interaction is very complex. Flame dynamics as well as thermal and radical pinching, chemical kinetics, stretching, curvature, wall reactions and heat transfer are key parameters of this interaction [8-10]. graphics manipulation software examplesFlame-wall-interaction (FWI) is investigated numerically using a premixed … FLAME-WALL INTERACTION IN LAMINAR FLOWS Before considering turbulent … Experimental Thermal and Fluid Science provides a forum for research … Laminar flame velocity determination for H 2 –air–He–CO 2 mixtures using the … Computations are for three modes of spherical laminar flame propagation: … chiropractor maple groveWebThe present article is aimed at identifying the impact of spray-wall interaction on combustion instabilities. This is achieved by systematically modifying the liquid fuel atomizer location with respect to the injector outlet in experiments carried out on a single-injector swirling combustor.The injector is characterized by a high swirl number and a relatively … graphics manufacturer powered by amdWebDec 24, 2016 · Flame-wall interaction is characterized cinematographically at 10 kHz recording rate using stereoscopic PIV to measure velocities and simultaneous planar OH-LIF to track flame fronts. These techniques are applied simultaneously in the central plane of the nozzle (Fig. 1 ). chiropractor maple valleyWebThe simulations are used to investigate the effects of the wall turbulent boundary layer (i) on the structure of a hydrogen–air premixed flame, (ii) on its near-wall propagation … chiropractor marion indianaWebApr 13, 2024 · This was the case with the least thermal diffusivity. Periodically oscillating flames were observed. Two flame fronts, each anchored near either of the walls, grew and decayed in size, in an alternate manner. After the growing flame front reached a maximum, it started decaying, while the other flame front (then at minimum) started growing in size. graphicsmaplib