Research on the reaction progress of thermodynamic combustion based on arc and jet plasma energies using experimental and analytical methods

Abstract

Plasma energies are a promising technique to increase IC engine performance, expend lean burn flame area, reduce exhaust gas, and enhance engine power. In particular, SI engines using combustion process can obtain the positive air, fuel and ignition sources, and international research organizations are intensively conducting research on new combustion in order to increase the performance for IC engines regarding solution methods that could ensure more stable combustion energies. These authors were conducted on arc and jet plasma energies in order to improve the reaction progress of thermodynamic combustion, where the unburned process in chemical state was changed from plasma signal, density, flame, temperature, and velocity, through experiment and analysis at rarefied mixture values of air and fuel excess ration (ϕ) from air and C3H8 after transmitting with discharge energies based on arc and jet plasma sources. Experimental and analytical methods were transmitted as high 1.2 J energy, where the strength of plasma volume was discharged between positive and negative electrodes to arc plasma, and jet plasma was monitored from reaction progress results as transmitting as 2.03 J energy higher than arc energy in order to have characteristics of directivity. Experimental and analytical conditions were set equally for combustion mixture ratio, which was changed at rarefaction from initial pressure of 4 bar, plasma duration 0.0015 s, plasma plug gap 1 mm, and mass fraction (ϕ) 1.0, 1.2, 1.4 and 1.6. Reaction progress results were noticeable in that jet plasma was influenced more by fast advantages to expend the laminar flame with various waves in an unburned process than arc plasma of combustion response time from thermal diffusion with transient temperature change, plasma volume energy, and jet plasma had more advantages for rarefied combustion state from various energies as changed mass fraction rates (ϕ = 1.0, 1.2, 1.4 and 1.6) by initial jet. Consequentially, density result is noticeable in that jet plasma was quickly changed by a chemical equilibrium of density higher than arc plasma energy.