An experimental study of the effect of hydrogen blending on burning velocity of LPG at elevated pressure

Yasiry, Ahmed; Shahad, Haroun A.K.

doi:10.1016/j.ijhydene.2016.08.097

Cited by 28 publications

(11 citation statements)

References 14 publications

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“…The flame front was forced to become suspended in the flow downstream, at which point the velocity of the flow was retarded by the impingement of two fuel jets. (6). In Figure 6, the turbulence intensities in the flow field of a stable flame and a lift-off flame both increased after the impingement of two fuel jets, in agreement with previous reports [20,24].…”

Section: Flow Visualization Distribution Of Velocity and Vorticity Isupporting

confidence: 90%

“…flame was blown off by the fuel jets. The range of the stable zone expanded with an increased H2 proportion and the increased equivalence ratios because the increased content of H2 enhanced the flame speed [6,7]. The increased flame speed supported the impinging flame to resist the flow speed of the fuel jets so as to maintain a stable state.…”

Section: Operating Range and Flame Patternsmentioning

confidence: 99%

“…The variable composition of syngas affects both the physical properties and the chemical reactions in combustion such as the flame stability, flame-flow interactions, and the emission of pollutants. The characteristics of syngas combustion, including flame propagation speed [4][5][6][7], chemical-kinetic mechanism [8,9], and flame structure [4,10], have been widely studied, as summarized [1]. Hydrogen is present in syngas in a large proportion, which induces flame instability [11] such as the opening of the flame tip and flashback issues [4,[12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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An Investigation of Fuel Mixing and Reaction in a CH4/Syngas/Air Premixed Impinging Flame with Varied H2/CO Proportion

et al. 2017

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For industrial applications, we propose a concept of clean and efficient combustion through burning syngas on an impinging burner. We performed experimental measurements of particle image velocimetry, OH radical (OH*) chemiluminescence, flame temperature, and CO emission to examine the fuel mixing and reaction of premixed impinging flames of CH 4 /syngas/air with H 2 /CO in varied proportions. The velocity distribution of the combustion flow field showed that a deceleration area in the main flow formed through the mutual impingement of two jet flows, which enhanced the mixing of fuel and air because of an increased momentum transfer. The deceleration area expanded with an increased CO proportion, which indicated that the mixing of fuel and air also increased with the increased CO proportion. Our examination of the OH* chemiluminescence demonstrated that its intensity increased with increased CO proportion, which showed that the reaction between fuel and air accordingly increased. CO provided in the syngas hence participated readily in the reaction of the CH 4 /syngas/air premixed impinging flames when the syngas contained CO in a large proportion. Although the volume flow rate of the provided CO quadrupled, the CO emission increased by only 12% to 15%. The results of this work are useful to improve the feasibility of fuel-injection systems using syngas as an alternative fuel.

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Section: Flow Visualization Distribution Of Velocity and Vorticity Isupporting

confidence: 90%

Section: Operating Range and Flame Patternsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Investigation of Fuel Mixing and Reaction in a CH4/Syngas/Air Premixed Impinging Flame with Varied H2/CO Proportion

et al. 2017

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“…The addition of CO 2 to LPG can lower the flammability limit, and the propagation flame can be controlled. The laminar combustion velocity reduces with an increase in the initial pressure and rises with an increase in the H 2 concentration , when hydrogen is introduced to LPG while under high pressure. The flame propagation of premixed LPG explosion in the tube was analyzed by Huo and Chow .…”

Section: Introductionmentioning

confidence: 99%

Risk Assessment of Liquefied Petroleum Gas Explosion in a Limited Space

Wang

Luo

et al. 2021

ACS Omega

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In recent years, the explosion accidents of liquefied petroleum gas (LPG) have induced tremendous losses. To analyze the deflagration danger of LPG, the explosion pressure and flame propagation features of the premixed LPG−air mixture in a closed pipeline at increased initial pressures and temperatures were examined by the numerical method. It has been shown that with an increase in the initial temperature, the highest explosion pressure and explosion induction period decrease, while the maximum flame temperature increases. As the initial temperature rises, the formation of the tulip flame accelerates, and the depression of the flame front increases at the same time. The elevated initial pressure raises the highest explosion pressure and the maximum flame temperature. Nevertheless, when the initial pressure exceeds 0.5 MPa, its impact on the flame temperature slowly diminishes. In addition, the gray relational analysis approach was utilized to evaluate the correlation between the initial condition and the derived parameters. The findings indicate that the initial pressure exerts the largest influence on the four explosion parameters. The research finding is important for exposing the deflagration risk features of LPG under complicated working situations, evaluating the explosion risk of correlated procedures and devices, and formulating scientific and effective explosion-proof measures.

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“…Nair et al 22 have done an experimental investigation on the effect of CO 2 /N 2 dilution on the LBV of the liquefied petroleum gas (LPG)−air mixture. Yasiry et al 23 studied the effect of hydrogen addition on the laminar burning velocity of LPG at elevated pressures using a constant volume chamber method. This experimental study revealed that the flame propagation speed increases with an increase in hydrogen addition in the mixture, especially for a mixture having a hydrogen content higher than 60%.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hydrogen Addition on Laminar Burning Velocity of Liquefied Petroleum Gas Blends

et al. 2019

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The consequences of H2 enrichment on the laminar burning velocity (LBV) of various liquefied petroleum gas (LPG) blends have been studied experimentally and numerically. The study was carried out at various equivalence ratios (ϕ) (from 0.8 to 1.3 in steps of 0.1). Experiments were conducted on various LPG blends, by adding hydrogen up to 60% by volume in steps of 20, using the heat flux method (HFM) experimental setup. A detailed computational study was conducted using a PREMIX code to predict the LBV and to explain the flame structure of LPG–hydrogen–air mixtures. LBV predictions using two different chemical kinetic mechanisms such as Aramco Mech 2.0 and USC Mech II mechanism were compared with experimental results of the LBV for all the fuel mixture compositions studied. The LBV predicted by the Aramco Mech 2.0 mechanism matched well with the present experimental results. The LBV of the LPG–air mixture was observed to be increasing upon hydrogen addition. A linear increase in the LBV upon hydrogen addition was observed until 40% H2 addition in the fuel mixture. The effect of hydrogen addition was found to be more significant at 60% H2, showing a nonlinear increase in the LBV from 40 to 60% H2 addition. The effect of hydrogen addition on the LBV was observed to be prominent in the rich mixture side. The variation in the LBV with hydrogen enrichment was found to be dependent on the concentration of C3H8 in the fuel mixture. The effect of the composition of propane and butane on the LBV of LPG was also studied. The laminar burning velocity at elevated temperatures was measured using a diverging channel setup for LPG (60% C4H10–40% C3H8) at various H2 compositions. The temperature exponent was found to be decreasing with the hydrogen addition. The minimum value of the temperature exponent for all the studied mixture compositions was observed at ϕ = 1.1.

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An experimental study of the effect of hydrogen blending on burning velocity of LPG at elevated pressure

Cited by 28 publications

References 14 publications

An Investigation of Fuel Mixing and Reaction in a CH4/Syngas/Air Premixed Impinging Flame with Varied H2/CO Proportion

An Investigation of Fuel Mixing and Reaction in a CH4/Syngas/Air Premixed Impinging Flame with Varied H2/CO Proportion

Risk Assessment of Liquefied Petroleum Gas Explosion in a Limited Space

Effect of Hydrogen Addition on Laminar Burning Velocity of Liquefied Petroleum Gas Blends

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