Performance of a Plasma Jet Igniter

Cetegen, Baki M.; Teichman, Kevin Y.; Weinberg, F.J.; Oppenheim, A. K.

doi:10.4271/800042

Cited by 39 publications

(4 citation statements)

References 15 publications

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“…The benefits of a long cavity have been noted in a previous study of plume lengths (Cetegen et al, 1980). The benefits are equally apparent here in that it is evident that both the resistive heating of the gas in the cavity and the heat energy of the gas when it is eventually expelled show a strict proportionality to plasma length.…”

Section: Igniter Resistancementioning

confidence: 62%

“…For this reason considerable efforts have gone into determining the optimum dimensions of the cavity required to produce the longest plasma plume (Cetegen et a!., 1980;Grant et a!., 1983). For similar reasons calorimetric measurements have been carried out in order to determine the thermal energy dissipated in the cavity as a proportion of the energy stored in the capacitor (Carleton er al., 1982;Smy et al, 1983).…”

Section: Introductionmentioning

confidence: 99%

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Efficiency and Erosion of Plasma Jet Igniters-Variation with Voltage

Smy

Clements

Topham³

1985

Combustion Science and Technology

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The erosion and thermal efficiency of a plasma jet igniter operating at much higher than the usual discharge voltage has been monitored over a range of voltage. The working voltage range is from 5-30 kV with the stored energy being kept constant at about one Joule. It is found that igniter lifetime is increased by about a n order of magnitude over the figure previously reported for the same type of igniter operating at the more conventional voltage level of -1 kV.At the same time, contrary to expectation, the thermal efficiency is found to remain more o r less constant with voltage. Since such desirable properties as turbulencc and radical formation can be expected to increase with thermal efficiency it now seems that the present, very severe limitation upon igniter lifetime can be reduced to manageable proportions without reduction of igniter performance by operating a t high voltages. Measurements of the damping of the oscillatory currents obtained at high voltages allow the time-averaged plasma resistance to be calculated as a function of the cavity length. It is found that resistance is proportional to length, reinforcing the findings of other researchers that longer cavities are t o be preferred.

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Section: Igniter Resistancementioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Efficiency and Erosion of Plasma Jet Igniters-Variation with Voltage

Smy

Clements

Topham³

1985

Combustion Science and Technology

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“…FDIs, on the other hand, create a plasma discharge with whatever exists at the cavity of the igniter during the operation of the engine [3]. The design can be considered similar to a simplified pulsed plasma jet igniter (PPJ) [6,7] but without any supply of a specific plasma medium.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of ignition of a gas turbine by the addition of small amounts of H₂O₂

Prongidis

McIntosh

Wilson

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part A:

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A novel ignition system was studied experimentally, in which small volumes of hydrogen peroxide – of the order of µL/s – were injected at the site of ignition, during the firing of a focus discharge igniter. Experiments were made at an atmospheric testing facility using an industrial Rolls-Royce olympus combustion chamber with kerosene Jet A1 as the fuel and atmospheric air as the oxidizer. The study concentrated on the determination of the lean ignition limits of the Jet A1–air mixture at various air mass flowrates with and without the addition of H2O2. Notable improvements, from 6.5 per cent to 44 per cent, in the ignition limits of the kerosene–air mixture were attainable using only a small amount of H2O2 during the ignition process. The study suggests that these improvements are directly related to the increase in the ignition efficiency of the igniter.

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“…The aerodynamics of jet penetration and entrainment of ambient charge have been investigated both experimentally and theoretically (Cetegen et al, 1980;Topham et al, 1982;Smy et al, 1982). These studies reveal that it is the highly turbulent nature of the plasma discharge that is the main reason for combustion enhancement, in that it greatly facilitates the distribution of ignition sites and the entrainment of unreacted mixture.…”

Section: Introduction LImentioning

confidence: 99%