Measurements of the laminar burning velocity for propane: Air mixtures

Abstract

In this research, an experimental setup was built based on using K-type thermocouples inserted in a cylindrical vessel and coupled with a computer system to enable online reading of flame speed for propane-air mixtures. The work undertaken here has come up with data for laminar burning velocity of the propane-air mixtures based on three initial temperatures T u = 300, 325 and 350 K, three initial pressures p u = 0.5, 1.0 and 1.5 bar over a range of equivalence ratios f between 0.6 and 1.5. The results obtained gave a reasonable agreement with experimental data reported in the literature. Results showed that laminar burning velocity increases at low initial pressures and decreases at high pressures, while the opposite occurs incase of temperatures. The maximum values of the laminar burning velocity occur at T = 350 K, p u = 0.5 and f = 1.0, respectively, while the minimum values of the laminar burning velocity occur at T = 300 K, p u = 1.5 and f = 1.2. Also, the influence of flame stretching on laminar burning velocity was investigated and it was found that stretch effect is weak since Lewis number was below unity for all cases considered. Based on experimental results, an empirical equation has been derived to calculate the laminar burning velocity. The values of the laminar burning velocity calculated from this equation show great compatibility with the published results. Therefore, the derived empirical equation can be used to calculate the burning velocities of any gas of paraffin gas fuels in the range of mixture temperature and pressure considered.

Propane Gas Thermoelectric Generator with Microcontroller Integrated Development Environment Hot Side Temperature Control

“…The flame velocity increases slightly with an increase in initial gas temperature increases markedly with an increase in mixture strength. Ebaid and Al-Khishali [25] obtained similar results for propane air mixture. A 3.32% increase in initial gas temperature resulted in 8.45% increase in laminar flame speed while a 33.33% increase in mixture strength resulted in a 444.4% increase in laminar flame velocity.…”

Ignition of premixed air/fuel mixtures by microwave streamer discharge

“…The streamer discharge initiated at the tips of a half-wave wire spreads along a dielectric surface in electrical field of a strength several times smaller than the air breakdown value. The flow induced by expansion of combustion products drives the apparent flame propagation speed hundreds times higher than its value of around 0.4 m/s in otherwise still gas mixture [30].…”

Compact Mechanism and CFD Predictions for C2–C16 Hydrocarbon Formation in Non-Premixed Propane Flames with Experimental Validation

“…The newly combined 178-species mechanism and 75-species skeletal mechanism are validated using ANSYS Chemkin-Pro for ignition delay times, flame, species profiles in a counterflow flame, and laminar burning velocity. − We comprehensively compare the computed ignition delay times with previously computed and measured values over a wide range of temperatures (675–1000 K), equivalence ratios (0.5–2), and pressures (21–37 atm). In the counterflow flame of propane, the validation is conducted for the profiles of temperature, propane, CO 2 , CO, and C 1 –C 3 hydrocarbons.…”