Experimental determination of laminar burning velocities and Markstein lengths for 75% hydrous-ethanol, hydrogen and air gaseous mixtures

Zhang, Zunhua; Li, Gesheng; Ouyang, Lin; Pan, Zhixiang; You, Fei; Gao, Xin

doi:10.1016/j.ijhydene.2011.07.073

Cited by 34 publications

(20 citation statements)

References 38 publications

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“…During the subsequent process of data processing, a range of 6−25 mm was imposed on the flame radius. 53 Avoiding the disturbances caused by the transient ignition process was responsible for the selection of the lower limit. The upper limit was …”

Section: Methodsmentioning

confidence: 99%

Experimental Investigation on Laminar Burning Velocities and Markstein Lengths of Premixed Methane–n-Heptane–Air Mixtures

Liang

Zhang

et al. 2015

Energy Fuels

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Laminar burning velocities and Markstein lengths of premixed methane−n-heptane−air mixtures were experimentally investigated at an initial pressure of 0.1 MPa, initial temperatures of 358, 393, and 428 K, and equivalence ratios of 0.7−1.5. The methane content in the methane−n-heptane mixtures ranges from 0 to 1. The experiments were conducted in a combustion chamber with central ignition. In the present study, the difference between the linear and nonlinear extrapolation methods was analyzed quantitatively for methane−n-heptane−air flames. Comparisons of the laminar burning velocities of methane−air and n-heptane−air flames were conducted, respectively, between the present and other studies. Subsequently, effects of the initial temperature and methane content on the laminar burning velocity and flame instability of methane−n-heptane−air mixtures were analyzed. Then, the critical methane content at which the laminar burning velocity and flame instability of methane−n-heptane−air flames start to change relatively significantly was explored. The results show that the laminar burning velocities of methane−air and n-heptane−air flames measured in the present study are in good agreement with the data available in the literature. Laminar burning velocities and flame instabilities of methane−n-heptane−air flames seem to be less sensitive to the methane content when the methane content is below 0.75. The change in the initial temperature tends to diminish the difference in the laminar burning velocity between methane−air and n-heptane−air flames and only has weak effects on the flame instability of methane−n-heptane−air mixtures. According to variations of the laminar burning velocities and Markstein lengths of methane−n-heptane−air flames with the methane content, the value of 0.75 can be treated preliminarily as the critical methane content.

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Section: Methodsmentioning

confidence: 99%

Experimental Investigation on Laminar Burning Velocities and Markstein Lengths of Premixed Methane–n-Heptane–Air Mixtures

Liang

Zhang

et al. 2015

Energy Fuels

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“…A linear relationship between the unstretched flame speed ( ) and stretched flame speed has been reported in [15][16][17] as…”

Section: Data Processingmentioning

confidence: 98%

“…Its diameter is 135 mm and the length is 270 mm. This model had also been used in [13][14][15][16]. The frontal end of the chamber was closed with transparent glass wall for capturing the fireball growth with a high speed camera.…”

Section: Experiments Design Procedure and Data Analysismentioning

confidence: 99%

“…Broustail et al [13], Beeckmann et al [14], Zhang et al [15], and Johnston and Farrell [16] studied the characteristic of laminar burning velocity from a variety of fuels in spherical combustion bomb and developed a theory of developing flame ball. According to this theory, the stretched laminar flame propagation speed ( ) can be calculated from the growth rate of flame radius as…”

Section: Data Processingmentioning

confidence: 99%

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The Role of Hydrogen Bonding on Laminar Burning Velocity of Hydrous and Anhydrous Ethanol Fuel with Small Addition of n-Heptane

Suarta

Wardana

Hamidi

et al. 2016

Journal of Combustion

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The molecular structure of mixed hydrous and anhydrous ethanol with up to 10% v n-heptane had been studied. The burning velocity was examined in a cylindrical explosion combustion chamber. The result showed that the burning velocity of hydrous ethanol is higher than anhydrous ethanol and n-heptane at stoichiometric, rich, and very rich mixtures. The burning velocity of hydrous ethanol with n-heptane drops drastically compared to the burning velocity of anhydrous ethanol with n-heptane. It is caused by two reasons. Firstly, there was a composition change of azeotropic hydrous ethanol molecules within the mixture of fuel. Secondly, at the same volume the number of ethanol molecules in hydrous ethanol was less than in anhydrous ethanol at the same composition of the n-heptane in the mixture. At the mixture of anhydrous ethanol with n-heptane, the burning velocity decreases proportionally to the addition of the n-heptane composition. The burning velocity is between the velocities of anhydrous ethanol and n-heptane. It shows that the burning velocity of anhydrous ethanol mixed with n-heptane is only influenced by the mixture composition.

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“…According to the experience of the use of high calorific value gas such as natural gas, Swirl combustion is an appropriate way [4]. Due to the airflow rotating, oxygen and fuel gas mixed strongly, a negative pressure zone will be generated within airflow, which makes the combustion more sufficient.…”

Section: Introductionmentioning

confidence: 99%

Optimization Study on Bias Angle of a Swirl Burner with Tangential Inlet Air

Ziqiang¹,

Guangqiang²,

Liu³

2016

IJSH

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In this paper numerical simulation and experimental study was carried out for a tangential inlet air swirl burner which is used for high heat value biomass gas. Study on the different inlet angle effects on Combustion by numerical method. The results of the study show that the 30 degree is the best. The intake angle burner 30 degrees were tested to verify the accuracy of simulation results. Through the comparative analysis of the trajectory and the velocity of the air, the method and the conclusion of the simulation study are reliable.

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Experimental determination of laminar burning velocities and Markstein lengths for 75% hydrous-ethanol, hydrogen and air gaseous mixtures

Cited by 34 publications

References 38 publications

Experimental Investigation on Laminar Burning Velocities and Markstein Lengths of Premixed Methane–n-Heptane–Air Mixtures

Experimental Investigation on Laminar Burning Velocities and Markstein Lengths of Premixed Methane–n-Heptane–Air Mixtures

The Role of Hydrogen Bonding on Laminar Burning Velocity of Hydrous and Anhydrous Ethanol Fuel with Small Addition of n-Heptane

Optimization Study on Bias Angle of a Swirl Burner with Tangential Inlet Air

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