Abstract
The steady and unsteady performance of two mixed-flow turbocharger turbine rotors has been investigated. These rotors differ mainly in their inlet blade angle geometry; one has a constant blade angle (rotor A) and the other a notionally constant incidence angle (rotor B). The results indicate that the constant blade inlet angle design offers improved efficiency characteristics over the constant incidence one with total-to-static efficiency at the design point ranging between 0.7 and 0.76. A detailed assessment of the influence of volute geometry on the turbine performance has been carried out, which confirmed that the geometry of volute plays a critical role in the overall performance of a turbine. The unsteady performance tests have indicated a substantial deviation from the performance and flow characteristics of equivalent steady-state tests, which is quantified and discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 535-550 |
| Number of pages | 16 |
| Journal | Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy |
| Volume | 221 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Jun 2007 |
Keywords
- Mixed-flow turbines
- Steady and unsteady performance
- Volute
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Mechanical Engineering