Topic
Diffusion flame
About: Diffusion flame is a research topic. Over the lifetime, 9266 publications have been published within this topic receiving 233522 citations.
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TL;DR: In this paper, the structure of a strained premixed laminar propane-air flame is examined and a flame is formed in the neighborhood of the stagnation point produced by the counterflow of fresh mixture and hot combustion products.
Abstract: —The structure of a strained premixed laminar propane-air flame is examined. The flame is formed in the neighborhood of the stagnation point produced by the counterflow of fresh mixture and hot combustion products. The governing conservation equations are solved numerically by employing adaptive continuation techniques. The model includes detailed transport and complex kinetics using a reaction scheme due to Warnatz. Flame structures, ignition regimes and extinction regimes are exhibited. The results are in excellent qualitative agreement with the asymptotic theory of Libby and Williams and can be used to develop a flame let description of turbulent premixed propane-air combustion.
84 citations
TL;DR: In this paper, the impact of toluene addition in n-decane on OH concentrations, maximum heat release rates, and extinction limits were studied experimentally and computationally by using counterflow diffusion flames with laser induced fluorescence imaging.
84 citations
TL;DR: In this paper, a 1D planar premixed cool flame induced by a hot pocket is simulated for DME/O2/N2 mixtures with detailed chemistry and transport, demonstrating the existence of a residence time window for quasi-steady propagation.
84 citations
01 Jan 2005
TL;DR: In this article, cellular instabilities of non-premixed diffusion flames arise in a polycrystalline alumina microburner with a channel wall gap of dimension 0.75mm.
Abstract: We examine the cellular instabilities of laminar non-premixed diffusion flames that arise in a polycrystalline alumina microburner with a channel wall gap of dimension 0.75 mm. Changes in the flame structure are observed as a function of the fuel type (H 2 , CH 4 , and C 3 H 8 ) and diluent. The oxidizer is O 2 /inert. In contrast to previous observations on laminar diffusion flame instabilities, the current instabilities occur in the direction of flow above the splitter plate, and only occur for the heavier fuel types. They are not observed in a H 2 –O 2 mixture, which will only support a continuous laminar flame inside our burner, regardless of the initial mixture strength and whether or not the flame is in near-quenching conditions. The only exception is when helium is added to the H 2 –O 2 mixture, raising the effective Lewis numbers of both components.
84 citations
TL;DR: In this paper, a three-color near-infrared optical pyrometer, with wavelengths centered at 998, 810, and 640 nm, was used to monitor the combustion of polymer particles.
84 citations