A5009426809- Advanced Combustion Engine Technologies
- Combustion and flame dynamics
- Combustion and Detonation Processes
- Atmospheric chemistry and aerosols
- Spectroscopy and Laser Applications
- Graphite, nuclear technology, radiation studies
- Radiative Heat Transfer Studies
- Nuclear and radioactivity studies
- Nuclear Physics and Applications
- Fire dynamics and safety research
- Advanced Battery Technologies Research
- Toxic Organic Pollutants Impact
- Coal Combustion and Slurry Processing
- Phase Equilibria and Thermodynamics
- Nuclear Materials and Properties
- Catalysis and Oxidation Reactions
- Laser Design and Applications
- Laser-induced spectroscopy and plasma
- Advanced Chemical Physics Studies
- Atmospheric and Environmental Gas Dynamics
- Nuclear reactor physics and engineering
- Gas Dynamics and Kinetic Theory
- Nuclear Issues and Defense
Texas A&M University
2018-2024
Walker (United States)
2020-2024
Mitchell Institute
2019-2023
Slovak Water Management Enterprise
1995
To assess the fire hazard associated with venting gases coming from a lithium-ion battery during thermal runaway, mixture representative of such gas was determined by averaging 40 compositions presented in literature. The final is composed C3H8, C2H6, C2H4, CH4, H2, CO, and CO2. combustion properties this were using various devices: shock tubes for ignition delay time measurements air H2O histories very dilute mixtures (99% Ar), as well closed bomb to measure laminar flame speeds....
This study presents new [Formula: see text] laminar flame speed ([Formula: text]) data for a wide range of equivalence ratios at low pressure (0.5 atm) and multiple initial pressures (0.5–3 an ratio far from stoichiometry text]). All experiments were conducted room temperature using spherically expanding flames. At 0.5 atm, peaked slightly lean, reaching maximum 411 cm/s near text]. Far stoichiometry, was approximately 72 34 2.4, respectively. predictions computed several commonly cited...
Abstract New laminar flame speed and burned-gas Markstein length data for H2–CO–O2–CO2–He mixtures have been measured from spherically expanding flames. Experiments were conducted at 10 atm room temperature H2:CO ratios ranging 2:1 to 1:4 overall CO2 mole fractions 0% 30%. dilution had little effect on length, but dilutions of 10%, 20%, 30% caused average reductions in 47%, 73%, 89%, respectively, regardless ratio. The study was designed isolate the speed, a detailed analysis using FCO2...
Abstract Turbulent combustion is a very active and challenging research topic of direct interest to the design operation gas turbine engines. A spherically expanding flame immersed in turbulent field one way gain fundamental insight on effect turbulence combustion. This kind experiment often conducted inside fan-stirred bomb, preferably at conditions high pressure, temperature, intense turbulence. new bomb was designed built provide device for conducting measurements literature review...
Fundamental understanding of chemical kinetics pathways involved in ignition and flame propagation hydrocarbon flames is essential for designing efficient clean combustion devices aerospace applications. In this study, spherically propagating methane-air methane-ethane-air inside a constant-volume vessel were characterized using species-specific, high-speed chemiluminescence diagnostic to reveal the position spatially temporally resolved front primary zone. The emission recorded by camera...
The combustion properties of a gasoline-like blend pentene isomers were determined using multiple types experimental measurements. representative mixture (Mix A) is composed 5.7% 1-pentene (1-C5H10), 39.4% 2-pentene (2-C5H10), 12.5% 2-methyl-1-butene (2M1B), and 42.4% 2-methyl-2-butene (2M2B) (% mol). Laminar flame speeds measured at equivalence ratios 0.7-1.5 in constant-volume chamber, ignition delay times (including both OH* CH* diagnostics) as well CO time-history profiles performed...
Abstract The push for lower carbon emissions in power generation has driven interest methods of capture and sequestration. One such promising method involves the supercritical CO2 (sCO2) cycle, a system which is powered by oxy-fuel combustion where dioxide used as working fluid. high concentration products allows relatively simple extraction from system. Although this an active field research, design combustor requires continued study levels diluent. With that objective mind, laminar flame...
Abstract Natural gas is a major fuel source for many industrial and power-generation applications. The primary constituent of natural methane (CH4), while smaller quantities higher order hydrocarbons such as ethane (C2H6) propane (C3H8) can also be present. Detailed understanding combustion important to obtain the highest possible efficiency with minimal environmental impact in devices turbines furnaces. For better performance gas, several parameters study are flame temperature, heat release...
Modeling of turbulent flame behavior relies on fundamental understanding laminar characteristics, such as speed and thickness. The thickness a has several definitions, depending the relevant parameters objectives. In interest validating chemical kinetics mechanisms providing target data for validation CFD models, species-based can be defined width spatial distribution profile an intermediate species across front. This work shows application chemiluminescence diagnostics to measurements by...
Abstract Spherically expanding, laminar flame experiments have been conducted for oxy-methane mixtures diluted in CO2. Test conditions consisted of pressures 5 atm and 10 atm, an ambient initial temperature 298 K, a full range equivalence ratios from lean to rich. Schlieren imaging was used image the flames. The tested this study contained helium purpose increasing Lewis number suppress onset thermal-diffusive instabilities. Flame speeds ranged 24.3 30.4 cm/s at pressure 17.9 22.6 resulting...
View Video Presentation: https://doi.org/10.2514/6.2022-0638.vid Phosphorus-containing compounds, including organophosphorus substances, are valuable laboratory flame additives for understanding the combustion behavior of sarin. Chemiluminescence features excited intermediate species useful markers combustion, but an effective chemiluminescence-based diagnostic phosphorus-based compounds is yet to be developed. In this study, chemiluminescence spectra atmospheric-pressure flames doped with...
Phosphorus-containing compounds, including organophosphorus substances, are valuable laboratory flame additives for understanding the combustion behavior of sarin. Chemiluminescence features excited intermediate species useful markers combustion, but an effective chemiluminescence-based diagnostic phosphorus-based compounds is yet to be developed. In this study, chemiluminescence spectra atmospheric-pressure flames doped with three phosphorus-containing namely, dimethyl methylphosphonate,...