Computational Simulation of Entropy Generation in a Combustion Chamber Using a Single Burner

Abstract

In this study, we examine the behavior of a propane diffusion flame with air in a burner; the computational investigations are achieved for each case employing the Fluent package. The graphs generated illustrate the influence of flow parameters, the effects of the oxygen percentage in the air, and the effects of the equivalence ratio φ on the entropy generation, the temperature gradients, and the Bejan number. The obtained results show that incorporation of hydrogen with propane reduced both temperature and carbon monoxide emission.

Comparative Performance Metric Assessment of A Military Turbojet Engine Utilizing Hydrogen And Kerosene Fuels Through Advanced Exergy Analysis Method

“…Increases in CO 2 emissions and temperature cause climate change across the world. In this regard, many studies have been executed in order to eliminate the unfavorable effects of the emissions in aviation [2][3][4][5][6]. Moreover, another challenge that must be considered is the diminution of fossil energy resources.…”

Numerical study of asymmetric and axisymmetric thermal jet with entropy generation concept

“…The contours of generation of local entropy by volume unit, for the three injector geometries under study, are existed in Figure 7 with density ratios (Rρ = 0.66). Note that the contour lines are very crowded close to the outlet of the nozzle and have elevated values, as well, the layer of the mixture augments straight with the direction of the jet and, the temperature gradient gradually reduces in the section of the affinity of the jet [11,15]. This means that the viscous dissipation at the outlet of the nozzle is predominant but gets negligible in the region of the affinity of the jet [11,15].…”

“…After these, the generation of local entropy per unit of volume remains constant [13]for all three types of jets. Viscous dissipation becomes negligible [11,15].…”

“…For their part, Boussoufi et al [13] have studied numerically the flow characteristics and entropy generation of multiple jets and succeeded in showing that, the multiple jets augments the rate of generation entropy. It was also studied by Morsli et al [14][15][16][17][18] and others differently in several areas. Where their results indicated that the rates of generation of total entropy reduce with an augment equivalent ratio and oxygen percentage in air [14], augment with Rayleigh number [15] and in position where reactions are effective [16].…”

“…It was also studied by Morsli et al [14][15][16][17][18] and others differently in several areas. Where their results indicated that the rates of generation of total entropy reduce with an augment equivalent ratio and oxygen percentage in air [14], augment with Rayleigh number [15] and in position where reactions are effective [16]. Additionally, Ries et al [17] studied the production of entropy in the turbulent flow near the wall inside a general heat exchanger from air to air, where ABSTRACT -In the current investigation, numerical study of a thermal jet of asymmetric (rectangular and elliptical) and axisymmetric (circular) geometry was investigated with variable density to verify the impact of the ratio of density and geometry on the generation of entropy.…”