One-dimensional pulse-flow modeling of a twin-scroll turbine

M. S. Chiong, S. Rajoo, A. Romagnoli, A. W. Costall, R. F. Martinez-Botas

Research output: Contribution to journalArticlepeer-review

36 Citations (SciVal)


This paper presents a revised one-dimensional (1D) pulse flow modeling of twin-scroll turbocharger turbine under pulse flow operating conditions. The proposed methodology in this paper provides further consideration for the turbine partial admission performance during model characterization. This gives rise to significant improvement on the model pulse flow prediction quality compared to the previous model. The results show that a twin-scroll turbine is not operating at full admission throughout the in-phase pulse flow conditions. Instead, they are operating at unequal admission state due to disparity in the magnitude of turbine inlet flow. On the other hand, during out-of-phase pulse flow, a twin-scroll turbine is working at partial admission state for majority of the pulse cycle. An amended mathematical correlation in calculating the twin-scroll turbine partial admission characteristics is also presented in the paper. The impact of its accuracy on the pulse flow model prediction is explored.

Original languageEnglish
Pages (from-to)1291-1304
Number of pages14
Publication statusPublished - 15 Nov 2016


  • Modeling
  • One-dimensional
  • Pulse flow
  • Turbine
  • Turbocharger
  • Twin-scroll
  • Wave action

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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