This paper presents an investigation of the effects of ported shroud (PS) self-recirculating casing treatment used in turbocharger centrifugal compressors for increasing the operable range. The investigation consists of computing three-dimensional flow in a representative centrifugal compressor with and without PS at various levels of approximations in flow physics and geometrical configuration; this provides an enabler for establishing the causal link between PS flow effects and compressor performance changes. It is shown that the main flow path perceives the PS flow as a combination of flow actuations that include injection and removal of mass flow and injection of axial momentum and tangential momentum. A computational model in which the presence of the PS is replaced by imposed boundary conditions (BCs) that reflect the individual flow actuations has thus been formulated and implemented. The removal of a fraction of the inducer mass flow has been determined to be the dominant flow actuation in setting the performance of PS compressors. Mass flow removal reduces the flow blockage associated with the impeller tip leakage flow and increases the diffusion in the main flow path. Adding swirl to the injected flow in the direction opposite to the wheel rotation results in an increase of the stagnation pressure ratio and a decrease of the efficiency. The loss generation in the flow path has been defined to rationalize efficiency changes associated with PS compressor operation.
Skip Nav Destination
Article navigation
August 2017
Research-Article
Characterizing Flow Effects of Ported Shroud Casing Treatment on Centrifugal Compressor Performance
George A. Christou,
George A. Christou
Department of Aeronautics and Astronautics,
Massachusetts Institute of Technology,
Cambridge, MA 02139
e-mail: gchristo@mit.edu
Massachusetts Institute of Technology,
Cambridge, MA 02139
e-mail: gchristo@mit.edu
Search for other works by this author on:
Choon S. Tan,
Choon S. Tan
Department of Aeronautics and Astronautics,
Massachusetts Institute of Technology,
Cambridge, MA 02139
e-mail: choon@mit.edu
Massachusetts Institute of Technology,
Cambridge, MA 02139
e-mail: choon@mit.edu
Search for other works by this author on:
Giuseppe Alescio
Giuseppe Alescio
Search for other works by this author on:
George A. Christou
Department of Aeronautics and Astronautics,
Massachusetts Institute of Technology,
Cambridge, MA 02139
e-mail: gchristo@mit.edu
Massachusetts Institute of Technology,
Cambridge, MA 02139
e-mail: gchristo@mit.edu
Choon S. Tan
Department of Aeronautics and Astronautics,
Massachusetts Institute of Technology,
Cambridge, MA 02139
e-mail: choon@mit.edu
Massachusetts Institute of Technology,
Cambridge, MA 02139
e-mail: choon@mit.edu
Borislav T. Sirakov
Vai-Man Lei
Giuseppe Alescio
1Corresponding author.
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received November 13, 2016; final manuscript received December 20, 2016; published online March 21, 2017. Editor: Kenneth Hall.
J. Turbomach. Aug 2017, 139(8): 081005 (12 pages)
Published Online: March 21, 2017
Article history
Received:
November 13, 2016
Revised:
December 20, 2016
Citation
Christou, G. A., Tan, C. S., Sirakov, B. T., Lei, V., and Alescio, G. (March 21, 2017). "Characterizing Flow Effects of Ported Shroud Casing Treatment on Centrifugal Compressor Performance." ASME. J. Turbomach. August 2017; 139(8): 081005. https://doi.org/10.1115/1.4035664
Download citation file:
Get Email Alerts
Cited By
Experimental Study on Controlling Flow Separation of Compressor Cascades With Self-Excited Sweeping Jet Actuator
J. Turbomach (September 2025)
Development of Compact and Hermetic Organic Rankine Cycle Turbine Generator With Upgraded Cooling Capability
J. Turbomach (September 2025)
Unsteadiness in the Secondary Flows of a High-Speed Low-Pressure Turbine Cascade With Unsteady Wakes and Purge Flow
J. Turbomach (September 2025)
Design and Analysis of a Liftfan for eVTOL Aircraft
J. Turbomach (September 2025)
Related Articles
Enhancement of Centrifugal Compressor Operating Range by Control of Inlet Recirculation With Inlet Fins
J. Turbomach (October,2016)
Delay of Rotating Stall in Compressors Using Plasma Actuators
J. Turbomach (September,2016)
An Investigation of Real Gas Effects in Supercritical CO 2 Centrifugal Compressors
J. Turbomach (September,2015)
Meanline Modeling of Inlet Recirculation in Automotive Turbocharger Centrifugal Compressors
J. Turbomach (January,2015)
Related Proceedings Papers
Related Chapters
Dynamic Behavior of Pumping Systems
Pipeline Pumping and Compression Systems: A Practical Approach
Turbocompressors
Pumps and Compressors
Strength and Modal Analysis on Impeller of High-Pressure and Small-Flow Centrifugal Pump
International Conference on Computer and Electrical Engineering 4th (ICCEE 2011)