Novel CFD approach for the thermal analysis of a continuous variable transmission (CVT)

Johannes Wurm, Matthias Fitl, Michael Gumpesberger, Esa Väisänen, Christoph Hochenauer

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The scope of this work is the development of a numerical model which is capable of predicting thermal conditions concerning a continuous variable transmission (CVT). State of the art literature covers the mechanism and power losses of CVT-systems in detail, though a thermal investigation is not available
so far. Computational fluid dynamics (CFD) is used for this task. Transient simulations are not feasible because of high computational costs. Hence, the case needs to be simplified to a steady-state problem. Motion has been modeled by using the multiple reference frame (MRF) approach but the prediction of
the pulley surface temperature is misleading. Local heat input, e.g. from the belt and asymmetric flow conditions are primarily responsible for the inaccuracy. The novelty of this study is the thermal modeling of heated pulleys where the errors, resulting from a steady state simulation, are compensated. The stability of the solution and the time efficiency are further advantages of the presented approach. Subsequent studies to optimize the CVT are the next step to increase fuel economy and reduced emissions.
Original languageEnglish
Pages (from-to)159 -169
Number of pages10
JournalApplied Thermal Engineering
Volume103
DOIs
Publication statusPublished - 20 Apr 2016

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Thermoanalysis
Computational fluid dynamics
Pulleys
Fuel economy
Numerical models
Hot Temperature
Costs
Temperature

Keywords

  • Heat transfer
  • Continuous variable transmission
  • CFD
  • MRF
  • Fluid-solid Interaction

Cite this

Novel CFD approach for the thermal analysis of a continuous variable transmission (CVT). / Wurm, Johannes; Fitl, Matthias; Gumpesberger, Michael; Väisänen, Esa; Hochenauer, Christoph.

In: Applied Thermal Engineering, Vol. 103, 20.04.2016, p. 159 -169.

Research output: Contribution to journalArticleResearchpeer-review

Wurm, Johannes ; Fitl, Matthias ; Gumpesberger, Michael ; Väisänen, Esa ; Hochenauer, Christoph. / Novel CFD approach for the thermal analysis of a continuous variable transmission (CVT). In: Applied Thermal Engineering. 2016 ; Vol. 103. pp. 159 -169.
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