Browse Publications Technical Papers 2016-01-1031
2016-04-05

Numerical Study of Unsteady Performance of a Double-entry Turbocharger Turbine under Different A/R Value Conditions 2016-01-1031

Turbocharging industry mainly employ steady method in the design and development process in present. However, the unsteady method is becoming more important for the exploration of the advanced turbocharging technique. This paper discusses the influences of A/R value on unsteady performances of a double-entry turbocharger turbine. In the study, numerical simulation has been done by ANSYS CFX software, The turbine have three kinds of A/R values that change in order, and the three schemes has the same unsteady flow boundary conditions. The simulation results show that the unsteady turbine performances have the characteristics loops representing filling and emptying effects. And the unsteady performances of the three schemes have some regular differences. The mean unsteady turbine efficiency decreases with increasing A/R value in the involved range, but the overall entropy of the turbine in a pulse period has no significant differences. In this paper, the flow loss of the turbine is analyzed to explore the mechanism of the influence of A/R value on unsteady turbine performances the from flow field aspect. The study may be helpful to have better understanding and comprehension of the actual working principle of turbocharger turbine and offer reference for future designs.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X