Numerical study on the spark ignition characteristics of hydrogen–air mixture using detailed chemical kinetics

Investigation of the effect of electrode geometry on spark ignition

“…Thin cylindrical electrodes have been considered by several authors [4, 5, 7-10, 15, 16]. In all the studies except [4,15] the diameters of the cylindrical electrodes were 1 to 2 mm; in the present study the diameter is 0.38 mm, on the order of the thickness of the initial spark channel. Finally, in our work, flanged electrodes are also considered.…”

“…Much of the previous work on simulating ignition has idealized the problem and treated one-dimensional spherical and cylindrical spark kernels. Several authors have used two-dimensional simulations of spark discharge in a non-reactive gas [4][5][6][7] to investigate the fluid mechanics involved in the spark ignition process, and two-dimensional simulations of ignition are discussed in [8][9][10][11][12][13][14][15][16]. In all the two-dimensional studies, the classic toroidal shape of the hot gas kernel is observed, which occurs due to fluid flow inward toward the gap center.…”

“…Akram [5] and Thiele et al [10] performed simulations for several electrode geometries, however, the geometries were limited to blunt and cone-shaped electrodes with diameters of 1 to 2 mm. Most recently, Han et al simulated ignition in methane-air [14] and hydrogen-air [15] mixtures and studied the effects of temperature, electrode gap distance, electrode size (cylindrical electrodes), and spark duration on the predicted minimum ignition energy (MIE). These studies used detailed chemistry and provided new insight on the effect of different spark parameters on ignition.…”

Spark plug fault recognition based on sensor fusion and classifier combination using Dempster–Shafer evidence theory

“…as an important defect of electrical system in SI engines [11,12]. In spite of the significance of fault detection in electrical system of SI engines, a few works have been done in this field.…”

Wavelet denoising using different mother wavelets for fault diagnosis of engine spark plug

“…The increased gap decreases the spark plug performance and applies a pressure on ignition system which can damage it, since more voltage is required for occurrence of the spark between the electrodes in comparison with normal condition. 3 Furthermore, spark plug gap increase fault is one of the main reasons for rising knock, decline in combustion quality, air pollution and reduced engine performance. Hence, it is necessary to recognise this fault in a SI engine in order to prevent the reduction in performance and further damages.…”