In hybrid electric vehicles (HEVs), the inverter is a critical component in the power module, which conditions the flow of electric power between the AC motor and the DC battery pack. The inverter includes a number of insulated gate bipolar transistors (IGBTs), which are high frequency switches used in bi-directional DC-AC conversion. The heat generated in the IGBTs can result in degraded performance, reduced lifetime, and component failures. Heat fluxes as high as 250 W/cm2 may occur, which makes the thermal management problem quite important. In this paper, the potential of self-oscillating jets to cool IGBTs in HEV power modules is investigated experimentally. A full factorial design of experiments was used to explore the impact of nozzle design, oscillation frequency, jet flow rate, nozzle-to-target distance, and jet configuration (free-surface or submerged) on heat transfer from a simulated electronic chip surface. In the free-surface configuration, self-oscillating jets yielded up to 18% enhancement in heat transfer over a steady jet with the same parasitic power consumption. An enhancement of up to 30% for the same flow rate (and velocity since all nozzles have the same exit area) was measured. However, in the submerged configuration, amongst the nozzle designs tested, the self- oscillating jets did not yield any enhancements in heat transfer over comparable steady jets. Results also suggest that oscillating jets provide a more uniform surface temperature distribution than steady jets.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Single-phase self-oscillating jets for enhanced heat transfer


    Beteiligte:
    Narumanchi, S. (Autor:in) / Kelly, K. (Autor:in) / Mihalic, M. (Autor:in) / Gopalan, S. (Autor:in) / Hester, R. (Autor:in) / Vlahinos, A. (Autor:in)


    Erscheinungsdatum :

    2008


    Format / Umfang :

    9 Seiten, 16 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Heat Transfer to Arrays of Oscillating Impingement Jets

    Clay, Alex / Ricklick, Mark A. / Hardy, Devon | AIAA | 2025


    Heat transfer characteristics of an oscillating heat pipe

    Lin, Lanchao / Ponnapan, Rengasamy / Leland, John | AIAA | 2000


    Circulation Control Using Arrays of Fluidically Oscillating Jets

    Vukasinovic, Bojan / Funk, Robert B. / Glezer, Ari | AIAA | 2025


    Oscillating Heat Transfer in Reversing Pipe Flow

    Tang, X. / Asik, J. R. / SAE | British Library Conference Proceedings | 1998


    Oscillating Heat Transfer in Reversing Pipe Flow

    Asik, Joseph R. / Tang, Xiaoguo | SAE Technical Papers | 1998