Abstract
The inlet pulsation in twin-entry turbine on automotive turbocharger was not synchronized. The performance of the turbine designed on steady changed when working under actual condition. To achieve higher efficiency, the numerical simulation was used to study the flow field of turbine when the pulse frequency was 40 Hz. The results showed that the more unbalance of the pressure between the two channels was, the worse the efficiency and flow capacity of the turbine were. The variation of the incidence angle had great influence on turbine rotor flow field. The incidence angle at the rotor inlet varied along leading edge, its value was also related to the inlet pressure of the turbine stage. Besides, the pulse wave mainly affected the separation flow on suction surface.
| Original language | English |
|---|---|
| Pages (from-to) | 51-55 |
| Number of pages | 5 |
| Journal | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics |
| Volume | 37 |
| Issue number | 1 |
| Publication status | Published - 1 Jan 2016 |
Keywords
- Out-of-phase pulse admission
- Pulse turbocharging
- Twin-entry mixed-flow turbine
- Unsteady