It is well known that flames are rich in charged particles, ions and free electrons and such electrical activity will modify the permittivity and conductivity of the reaction zone. Work at UMIST over the past decade has led to the development of sensitive circuitry to detect such electrical changes within an enclosed volume. A commercially available electrical capacitance tomography (ECT) system, based on a switched capacitor circuit, was used in the investigations reported in this paper. Although nominally a capacitance measuring circuit, e.g. monitoring changes in permittivity, the ECT system also responds to changes in conductivity. In flames, the latter is normally the dominant effect. The ECT system has been connected to six electrodes inside a sealed combustion chamber, and used to monitor laminar methane/air flame propagation. The results were encouraging but inferior in spatial and temporal resolution to those obtained using high-speed Schlieren photography. A new (open) combustion can has been built, which has 12 electrodes, thus giving better spatial resolution. The new model is aimed at jet engine combustion studies. Here two factors are of particular importance: 1. Is the flame centrally located? and 2. Is the flame stable? The sensitivity of the ECT system increases rapidly as the flame approaches the electrodes and can thus be expected to highlight the two factors noted above.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Imaging combustion using electrical capacitance tomography


    Beteiligte:


    Erscheinungsdatum :

    2000


    Format / Umfang :

    4 Seiten



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Engine flame imaging using electrical capacitance tomography

    He, R. / Xie, C.G. / Waterfall, R.C. et al. | Tema Archiv | 1994


    Evaluation of Liquid Sloshing using Electrical Capacitance Tomography

    Behruzi, Philipp / Hunt, Andrew / Foster-Turner, Richard | AIAA | 2020


    EVALUATION OF LIQUID SLOSHING USING ELECTRICAL CAPACITANCE TOMOGRAPHY

    Behruzi, Phillip / Hunt, Andrew / Foster-Turner, Richard | TIBKAT | 2020


    Microgravity Electrical Capacitance Tomography Data Set

    Jedediah Morse Storey / Brandon Steven Marsell / Michael Elmore et al. | NTRS | 2022


    ELECTRICAL CAPACITANCE TOMOGRAPHY APPARATUS, SYSTEMS AND METHODS

    HUNT ANDREW / FOSTER-TURNER RICHARD | Europäisches Patentamt | 2021

    Freier Zugriff