Asymmetry, as the most significant characteristic of asymmetric twin-scroll turbines, has a significant effect on the flow characteristics of asymmetric twin-scroll turbines. In this paper, the effect of asymmetry on flow parameters, efficiency, twin-scroll pressure ratio (SPR), single admission twin-scroll flow parameters ratio (SSMR) and twin-scroll divide wall of asymmetric twin-scroll turbines were investigated for the first time. First, several turbines with the same total critical section of twin scrolls and different asymmetries were designed, as well as several turbines with the same asymmetric twin scrolls and different heights of the divide wall. Subsequently, these asymmetric twin-scroll turbines were tested and studied on the turbine performance rig. Asymmetry had little influence on turbine flow characteristics under equal admission, but a great impact under partial and single admission. Meanwhile, SMR had a low slope linear relationship with the expansion ratio for every asymmetry turbine. Moreover, the asymmetry was approximately linear with the average single admission twin-scroll pressure ratio (SSMRave), which could be used to guide the early design of asymmetric twin-scroll turbines. Besides, divide wall schemes testing found that the length of divide wall had a certain effect on the SSMRave, which is a control factor to maintain asymmetric property. Finally, the relation between the expansion ratio of small or large scroll turbines and lg(SPR) was approximately exponential function, and the exponential parameter was strongly correlated with SSMR and SSMRave, which could be the key parameter reflecting the asymmetry.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    An investigation on asymmetric flow characteristics of asymmetric twin-scroll turbine


    Beteiligte:
    Jin, Jianjiao (Autor:in) / Ru, Qiusheng (Autor:in) / Zhang, Chenyun (Autor:in) / Cao, Tianyi (Autor:in)


    Erscheinungsdatum :

    01.02.2025




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Performance Improvement of an Asymmetric Twin Scroll Turbocharger Turbine through Secondary Flow Injection

    Romagnoli, Alessandro / Mamat, Aman / Kraft, Markus et al. | SAE Technical Papers | 2020


    Performance Improvement of an Asymmetric Twin Scroll Turbocharger Turbine through Secondary Flow Injection

    Liu, Zheng / Romagnoli, Alessandro / Palenschat, Torsten et al. | British Library Conference Proceedings | 2020


    Performance Improvement of an Asymmetric Twin Scroll Turbocharger Turbine through Secondary Flow Injection

    Liu, Zheng / Romagnoli, Alessandro / Palenschat, Torsten et al. | British Library Conference Proceedings | 2020


    Optimization of an Asymmetric Twin Scroll Volute Turbine under Pulsating Engine Boundary Conditions

    Nakov, Galin / Hoffmann, Kai / Wahl, Peter et al. | SAE Technical Papers | 2020


    Optimization of an Asymmetric Twin Scroll Volute Turbine under Pulsating Engine Boundary Conditions

    Palenschat, Torsten / Wahl, Peter / Nakov, Galin et al. | British Library Conference Proceedings | 2020