The thermal energy transferred to noncombusting gases by a spark at pressures from 1 to 7 atmospheres was measured using a pressure-rise calorimeter. The energy transfer efficiency (from electrical to thermal energy) was determined for conventional coil ignition systems, a plasma jet ignitor, and an ultra-short pulse (USP) ignitor. For the coil systems, the efficiency was strongly dependent on pressure and gap size, but weakly dependent on the type of spark plug. The efficiencies varied from 5% to 65%, with increases in pressure and gap size giving higher values. Electrode diameter and gas composition also had an effect on the efficiency. For a constant current, variable duration discharge system, the efficiency decreased by a factor of three as the energy increased from 12 to 75 mJ. The efficiency of the USP (breakdown discharge) system was slightly higher than for a conventional coil system. The energy efficiency for the plasma jet ignitor was fairly constant for electrical energies from 0.2 to 1 J.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Calorimetry of Ignition Sparks


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    SAE International Congress and Exposition ; 1988



    Erscheinungsdatum :

    01.02.1988




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Calorimetry of ignition sparks

    Teets,R.E. / Sell,J.A. / General Motors Research Lab.,US | Kraftfahrwesen | 1988


    Heat energy of various ignition sparks

    Engineering Index Backfile | 1920


    Ignition Characteristics of the Repetitive Electric Sparks

    Cho,K.K. / Jeung,I.S. / Seoul National University,Dep.of Aeronautical Engineering,KR | Kraftfahrwesen | 1983


    Action of different kinds of ignition sparks

    Petard, Re´ / ne M. | Engineering Index Backfile | 1905


    Some Notes on Sparks and Ignition of Fuels

    Fisher, Franklin A. | NTRS | 2000