Structure of a boundary layer with injection and combustion of ethanol

Boyarshinov, B. F.; Volchkov, É. P.; Терехов, В. И.

doi:10.1007/bf00749634

Cited by 8 publications

(8 citation statements)

References 2 publications

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“…The maximum value of T is seen to be located at the center of the heat-release region Q d > 0 surrounded by layers with heat absorption Q d < 0. In the fuel zone, apparently, the region with heat absorption is associated with formation of intermediate reaction products: acetaldehyde and carbon monoxide [14]. In terms of the overall level of heat release (≈600 MW/m 3 ) and the thickness of the heatrelease zone (≈0.8 mm, which is the distance between the points where Q d = 0), the resultant estimates agree with data for methane combustion [9] in counterjets.…”

Section: Boundary Layer At the Stagnation Pointsupporting

confidence: 64%

“…2b, the temperatures at these points are higher than 1200 K, and chemical interaction is possible if reagents are present. As was noted in [14], however, there is no fuel on the heat-release boundaries with y/y f > 1, whereas there is no oxidizer in the region with y/y f < 1. Therefore, there is no chemical reaction on the boundaries of the heat-release region.…”

Section: Boundary Layer At the Stagnation Pointmentioning

confidence: 79%

“…3b) for the corresponding levels of turbulence. The horizontal arrows show the coordinates of the flame "front" based on the data of [11,14,15]: (1), temperature (2), and CH radical (3) according to [11]; the data for the CH radical are plotted in relative units; curve 4 shows the polynomial approximation. the shift of the maximums of the OH concentration and temperature reaches 2-3 mm.…”

Section: Boundary Layer On a Flat Horizontal Wallmentioning

confidence: 99%

“…The study involves experimental data on the distributions of the OH and CH radicals and stable substances and on the mean velocities and temperatures obtained in [11,14,15].…”

Section: Initial Datamentioning

confidence: 99%

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Effect of heat transfer on the distributions of OH and CH radicals in the boundary layer with ethanol combustion

Boyarshinov

2008

Combust Explos Shock Waves

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The reasons for formation of superequilibrium concentrations of radicals are studied by means of joint consideration of experimental data on the distributions of CH and OH molecules formed during diffusion combustion of ethanol and data on heat transfer in the chemical reaction region. The air flow velocity near the stagnation point in experiments with combustion is 0.7 m/sec, and the flow velocity along a flat plate is 10 m/sec (the turbulence levels are 1 and 18%). Mutual locations of specific features in the distributions of the heat-release rate and temperature are analyzed and compared with the distributions of OH and CH radicals. For all turbulence levels and flow velocities considered, the maximum concentration of radicals is reached on the boundaries of the heat-release region, whose locations are determined by molecular transport mechanisms. It is demonstrated that this conclusion is applicable to experimental data on diffusion combustion of a submerged hydrogen jet in air.

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Section: Boundary Layer At the Stagnation Pointsupporting

confidence: 64%

Section: Boundary Layer At the Stagnation Pointmentioning

confidence: 79%

Section: Boundary Layer On a Flat Horizontal Wallmentioning

confidence: 99%

“…The study involves experimental data on the distributions of the OH and CH radicals and stable substances and on the mean velocities and temperatures obtained in [11,14,15].…”

Section: Initial Datamentioning

confidence: 99%

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Effect of heat transfer on the distributions of OH and CH radicals in the boundary layer with ethanol combustion

Boyarshinov

2008

Combust Explos Shock Waves

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“…The difference in the profiles of the CH and OH concentrations is also noted in the flame of the glassblower torch [10], in experiments with diffusion burning of methane [11], and in experiments with combustion of a partly mixed methane-air mixture [12]. Figure 1b shows the distributions of the volume concentrations of stable substances r i in combustion of ethanol, obtained by means of gas chromatography [13]. Possibly, the specific distribution of the CH concentration (see Fig.…”

Section: Discussion Of Resultsmentioning

confidence: 90%

Distribution of OH and CH Radicals in the Boundary Layer with Ethanol Combustion

Boyarshinov

Titkov

Fedorov

2005

Combust Explos Shock Waves

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The influence of free-stream turbulence on the distributions of CH and OH radicals is studied with the use of optical methods of measurements in focused beams. The data on CH concentration are obtained for the minimum level of turbulence, and the OH concentration profiles are obtained for three levels of velocity fluctuations: 1, 8, and 18%. It is shown that the regions where the OH and CH radicals are observed in the laminar boundary layer are shifted from the temperature maximum toward the oxidizer zone and toward the fuel zone, respectively. The highest level of the OH concentration is close to values typical of hydrogen combustion. The root-meansquare fluctuations of velocity and the mean values of the OH concentration vary nonmonotonically along the flame.

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Numerical Modeling of High-Enthalpy Two-Phase Flow in a Channel with Transverse Injection of a Reactive Liquid

Aref’ev

Voronetskiĭ

Прохоров

et al. 2022

J Eng Phys Thermophy

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Structure of a boundary layer with injection and combustion of ethanol

Cited by 8 publications

References 2 publications

Effect of heat transfer on the distributions of OH and CH radicals in the boundary layer with ethanol combustion

Effect of heat transfer on the distributions of OH and CH radicals in the boundary layer with ethanol combustion

Distribution of OH and CH Radicals in the Boundary Layer with Ethanol Combustion

Numerical Modeling of High-Enthalpy Two-Phase Flow in a Channel with Transverse Injection of a Reactive Liquid

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