Experimental study on the deflagration characteristics of methane-ethane mixtures in a closed duct

Luo, Zhenmin; Hao, Qiangqiang; Wang, Tao; Li, Ruikang; Cheng, Fangqin; Deng, Jun

doi:10.1016/j.fuel.2019.116295

Cited by 62 publications

(44 citation statements)

References 50 publications

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“…Figure 2 illustrates the process of obtaining a Schlieren image of the propagation flame radius using the commercial mathematical software MATLAB. This paper chose the Canny operator because of its high precision [20]. Before detecting the image boundary, five steps were applied: background removal, greyscale processing (the threshold value is 10), flame front extraction, boundary identification and fitting [21].…”

Section: Of 16mentioning

confidence: 99%

The Equivalent Effect of Initial Condition Coupling on the Laminar Burning Velocity of Natural Gas Diluted by CO2

Wang

Zhu

et al. 2021

Energies

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Initial temperature has a promoting effect on laminar burning velocity, while initial pressure and dilution rate have an inhibitory effect on laminar burning velocity. Equal laminar burning velocities can be obtained by initial condition coupling with different temperatures, pressures and dilution rates. This paper analysed the equivalent distribution pattern of laminar burning velocity and the variation pattern of an equal weight curve using the coupling effect of the initial pressure (0.1–0.3 MPa), initial temperature (323–423 K) and dilution rate (0–16%). The results show that, as the initial temperature increases, the initial pressure decreases and the dilution rate decreases, the rate of change in laminar burning velocity increases. The equivalent effect of initial condition coupling can obtain equal laminar burning velocity with an dilution rate increase (or decrease) of 2% and an initial temperature increase (or decrease) of 29 K. Moreover, the increase in equivalence ratio leads to the rate of change in laminar burning velocity first increasing and then decreasing, while the increases in dilution rate and initial pressure make the rate of change in laminar burning velocity gradually decrease and the increase in initial temperature makes the rate of change in laminar burning velocity gradually increase. The area of the region, where the initial temperature influence weight is larger, gradually decreases as the dilution rate increases, and the rate of decrease gradually decreases.

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Section: Of 16mentioning

confidence: 99%

The Equivalent Effect of Initial Condition Coupling on the Laminar Burning Velocity of Natural Gas Diluted by CO2

Wang

Zhu

et al. 2021

Energies

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“…Luo 15 combined the Gaussian software to analyze the microscopic thermodynamics and kinetics of gas explosion chain reaction and analyzed the explosion suppression mechanism of mine gas explosion from the perspectives of cooling, shielding barrier, and homogeneous inhibition. After that, he and Hao et al 16 studied the propagation characteristics of methane/ethane/air premixed explosion by using a horizontal closed pipe and a high-speed camera; they studied the evolution characteristics of the flow field in the pipeline during the explosion propagation by numerical simulation and obtained the variation law of the premixed flame propagation speed by using the program written by the Canny operator. The results show that ethane increases the reaction rate and explosion intensity of premixed gas.…”

Section: Introductionmentioning

confidence: 99%

Effect of Water on the Chain Reaction Characteristics of Gas Explosion

Zhang

Yang

et al. 2021

ACS Omega

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In order to explore the influence of water on the chain reaction characteristics of gas explosion, the 20 L explosion ball experiment and the homogeneous constant volume combustion reactor of CHEMKIN 17.0 simulations were carried out. The gas explosion response under four different water contents was tested and simulated. The effects of water on the pressure, free radicals, and reactants of gas explosion were compared and analyzed. The research results show that the inhibition of water on gas explosion was enhanced with the increase of water fraction in the initial mixture; the temperature, pressure, catastrophic gases such as CO, and concentration of activation centers in the reaction system can be reduced by water; the intensity of gas explosion can be reduced by inhibiting the formation of H, O, and OH free radicals, the main reactants of gas explosion and gas explosion energy.

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“…The main factors that affect the physical and mechanical properties of similar materials are the selection of raw materials (aggregate, cementitious material), proportion, density, moisture content, etc [39][40][41][42][43][44]. However, the research focus is on the selection of raw materials and their proportion, while there are few studies on the effect of the moisture content on the mechanical properties of similar materials [45][46][47][48]. Liu Shiliang et al [49] developed new similar materials that satisfy the requirements of fluid-solid coupling using river sand, calcium carbonate, talc, white cement, petroleum jelly and anti-wear hydraulic oil as raw materials; they tested the mechanical properties of the samples and applied the research results to the physical model test of water inrush from the coal floor.…”

Section: Introductionmentioning

confidence: 99%

Experimental development process of similar material of water resisting layer in physical model test

et al. 2021

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The stability evaluation of water resisting layer in the process of coal mining is the key to study the law of water and soil loss and prevent the loss of water resources. The development and proportioning of similar materials are the basis to study the stability of water resisting layer by physical simulation. A new type of similar material considering water characteristics was developed through orthogonal experiments. The similar material was composed of river sand, bentonite, silicone oil, vaseline, and water. Determine the best test development process. First of all, the proportion test scheme is designed based on the orthogonal test. Then, the influence of cement concentration, mass ratio of silicone oil to vaseline and other components on the density, uniaxial compressive strength, elastic model and Poisson’s ratio of similar materials was analyzed by range analysis. Finally, the multiple linear regression equation between the parameters and the composition of similar materials for water resisting layer is obtained, and the optimal composition ratio is further determined according to the relationship between the test influencing factors and the mechanical properties of similar materials. The results show that the selected raw materials and their proportioning method are feasible. The content of river sand plays a major role in controlling the density and Poisson’s ratio of similar materials. The mass ratio of aggregate to binder is the main factor affecting the uniaxial compressive strength and elastic modulus of similar materials, while the cementing concentration has the second largest influence on the density, uniaxial compressive strength, elastic modulus and Poisson’s ratio of similar materials. Determining the cementing concentration that matches the design of similar material model tests is critical to improving test accuracy and provides a reference for the preparation of similar materials for water resisting layer under different requirements during the development of similar materials.

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Experimental study on the deflagration characteristics of methane-ethane mixtures in a closed duct

Cited by 62 publications

References 50 publications

The Equivalent Effect of Initial Condition Coupling on the Laminar Burning Velocity of Natural Gas Diluted by CO2

The Equivalent Effect of Initial Condition Coupling on the Laminar Burning Velocity of Natural Gas Diluted by CO2

Effect of Water on the Chain Reaction Characteristics of Gas Explosion

Experimental development process of similar material of water resisting layer in physical model test

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