Unsteady Performance of a Double- Entry Turbocharger Turbine with Comparison to Steady-Flow Conditions

CD Copeland, R. M. Martinez-Botas, M. Seiler

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

17 Citations (Scopus)

Abstract

The circumferentially divided, double-entry turbocharger turbine is designed with a dividing wall parallel to the machine axis such that each entry feeds a separate 180° section of the nozzle circumference prior to entry into the rotor. This allows the exhaust pulses originating from the internal combustion exhaust to be preserved. Since the turbine is fed by two separate unsteady flows, the phase difference between the exhaust pulses entering the turbine rotor will produce a momentary imbalance in the flow conditions around the periphery of the turbine rotor. This research seeks to provide new insight into the impact of unsteadiness on turbine performance. The discrepancy between the pulsed flow behaviour and that predicted by a typical steady flow performance map is a central issue considered in this work. In order to assess the performance deficit attributable to unequal admission, the steady flow conditions introduced in one inlet was varied with respect to the other. The results from these tests were then compared to unsteady, in-phase and out-of-phase pulsed flow most representative of the actual engine operating condition.
Translated title of the contributionUnsteady Performance of a Double- Entry Turbocharger Turbine with Comparison to Steady-Flow Conditions
Original languageEnglish
Title of host publicationASME Turbo Expo: International Gas Turbine Institute
Pages1579 - 1588
Number of pages9
Volume6
DOIs
Publication statusPublished - 9 Jun 2008

Bibliographical note

Name and Venue of Event: Berlin, Germany
Conference Proceedings/Title of Journal: Proceedings of ASME Turbo Expo
Conference Organiser: American Society of Mechanical Engineers (ASME)
Other identifier: GT2008-50827

Fingerprint Dive into the research topics of 'Unsteady Performance of a Double- Entry Turbocharger Turbine with Comparison to Steady-Flow Conditions'. Together they form a unique fingerprint.

Cite this