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In the research on lateral vented explosions of gasoline vapor-air mixtures in pipelines with different opening pressures, the paper conducts a numerical simulation study of gasoline vapor-air mixture explosions in a rectangular pipeline with a length-to-diameter ratio of 15. By analyzing the explosion flame morphology, unburned fuel gas distribution, flow field structure, and overpressure variation characteristics, the results reveal that there are two different explosion modes with and without constraints, forming five typical overpressure peaks: , , , , and . There is a strong dynamic coupling relationship among explosion flame behavior, unburned fuel gas distribution, and flow field structure. The three overpressure peaks , , and in the internal explosion field, as well as the explosion intensity index, external explosion time, and external explosion delay time, are all related to the opening pressure.
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http://dx.doi.org/10.1021/acsomega.5c05019 | DOI Listing |
ACS Omega
August 2025
Petroleum, Oil & Lubricants Department, Army Logistics Academy of PLA, Chongqing 401311, China.
In the research on lateral vented explosions of gasoline vapor-air mixtures in pipelines with different opening pressures, the paper conducts a numerical simulation study of gasoline vapor-air mixture explosions in a rectangular pipeline with a length-to-diameter ratio of 15. By analyzing the explosion flame morphology, unburned fuel gas distribution, flow field structure, and overpressure variation characteristics, the results reveal that there are two different explosion modes with and without constraints, forming five typical overpressure peaks: , , , , and . There is a strong dynamic coupling relationship among explosion flame behavior, unburned fuel gas distribution, and flow field structure.
View Article and Find Full Text PDFThis Letter demonstrates the application of filtered Rayleigh scattering (FRS) for quantitative two-dimensional fuel vapor/air mixing measurements in an evaporating hydrocarbon fuel spray flow. Using the FRS approach, gas-phase measurements are made in the presence of liquid-phase droplets without interference. Effective suppression of the liquid-phase droplet scattering using FRS is enabled by the high spectral purity of the current Nd:YAG laser system.
View Article and Find Full Text PDFEnviron Sci Technol
April 2015
Internal Combustion Engineering Division, Department of Mechanical Engineering, College of Engineering Guindy, Anna University, Sardar Patel Road, Chennai, Tamil Nadu 600 025, India.
In parallel to the interest in renewable fuels, there has also been increased interest in homogeneous charge compression ignition (HCCI) combustion. HCCI engines are being actively developed because they have the potential to be highly efficient and to produce low emissions. Even though HCCI has been researched extensively, few challenges still exist.
View Article and Find Full Text PDFJ Environ Sci Health A Tox Hazard Subst Environ Eng
September 2001
Department of Civil and Environmental Engineering, Vanderbilt University, Nashville, TN 37235, USA.
The removal of trichloroethylene (TCE) by reduction with elemental iron was examined in batch reactors representing three phase gaseous systems (Fe0 (solid), water vapor + TCE vapor + air mixture (gaseous), and condensed water on Fe0 surface (aqueous)) and two phase aqueous systems (Fe0 (solid), water (aqueous)) as the reaction medium. Two separate removal mechanisms were found for TCE removal in the gas phase reactors: (1) adsorption onto the Fe0 surface under low relative humidity (RH), and (2) reaction with Fe0 to form other organic compounds, such as ethylene, isomers of dichloroethylene, and vinyl chloride under 100% RH conditions in the gas phase. The adsorption of TCE vapor onto the Fe0 surface was fast initially and highest at low temperatures.
View Article and Find Full Text PDFRes Commun Chem Pathol Pharmacol
November 1984
Blood n-hexane concentrations in rats is reported. Groups of four rats were exposed to a n-hexane vapor/air mixture, in a glass chamber. At the end of the exposure, the animals were sacrificed by decapitation, blood was collected, and the concentration of n-hexane in blood was determined by headspace gas chromatography.
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