This article is cited in 5 papers

Thermal and dynamic structure of an ethanol flame in the boundary layer near an obstacle

R. Kh. Abdrakhmanov, B. F. Boyarshinov

S.S. Kutateladze Institute of Thermophysics, Siberian Division of the Russian Academy of Sciences, Novosibirsk, 630090, Russia

Abstract: The distribution of the dynamic and thermal parameters of a gas in the immediate vicinity of a flame stabilizer (behind a rib and a backward-facing step 3 mm high) are studied. Data on the longitudinal and transverse velocity components, velocity pulsations, and correlations of pulsations in the boundary layer with combustion and without combustion are obtained using the PIV equipment. Temperature is measured with a thermocouple. Flame is visualized in the visible and ultraviolet regions. It is shown that in the flow attachment region near the leading edge of the flame, the gas velocity is close to the normal burning velocity. Heat release is estimated from the results of measurements. The presence of regions of volume and frontal combustion and kinetic and diffusion reaction is established. With increasing distance from the stabilizer, the heat-release rate decreases by more than an order of magnitude.

Keywords: stabilization of combustion, boundary layer, rib, backward-facing step, heat release, chemiluminescence.

UDC: 536.244

Received: 01.07.2014
Revised: 30.11.2014

DOI: 10.15372/FGV20160103

 English version: Combustion, Explosion and Shock Waves, 2016, 52:1, 26–34

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