...Michele Marconcini; Filippo Rubechini; Andrea Arnone; Seiichi Ibaraki A three-dimensional Navier–Stokes solver is used to investigate the flow field of a high pressure ratio centrifugal compressor for turbocharger applications. Such a compressor consists of a double-splitter impeller followed...

...Z. S. Spakovszky Rotating stall waves that travel against the direction of rotor rotation are reported for the first time and a new, low-order analytical approach to model centrifugal compressor stability is introduced. The model is capable of dealing with unsteady radially swirling flows...

...M. Zangeneh; M. Schleer; F. Pløger; S. S. Hong; C. Roduner; B. Ribi; R. S. Abhari In this paper the three-dimensional inverse design code TURBOdesign-1 is applied to the design of the blade geometry of a centrifugal compressor impeller with splitter blades. In the design of conventional impellers...

...Gary J. Skoch Results from a series of experiments to investigate techniques for extending the stable flow range of a centrifugal compressor are reported. The research was conducted in a high-speed centrifugal compressor at the NASA Glenn Research Center. The stabilizing effect of steadily flowing...

...Kai U. Ziegler; Heinz E. Gallus; Reinhard Niehuis The interaction between impeller and diffuser is considered to have strong influence on the flow in centrifugal compressors. However, the knowledge about this influence is still not satisfying. This two-part paper presents an experimental...

... and a single-stage centrifugal compressor, would improve by 0.8 percent if the efficiency of the back stage centrifugal unit could be raised by 4 percent. It was expected that this would result in a noticeable improvement of the thermal gas turbine efficiency. The paper describes the aerodynamic design process...

...N. A. Cumpsty, Chief Technologist, compressors centrifuges optimisation fluid dynamics turbulence stagnation flow I found this an interesting and original paper. Although I do not pretend to understand the details of the optimization procedure, I am interested in the predictions...

... p and ω are comparable in their magnitudes between the original and the other cases. Therefore, the end configurations are less dependent on the coefficients used and very close to each other. compressors centrifuges fluid dynamics optimisation turbulence stagnation flow...

...Peter Kupferschmied [S0889-504X(00)01903-6] gas turbines measurement systems probes compressors centrifuges aerodynamics heat transfer pressure sensors flow control The point made concerning the flow temperature indicated by probes with internal heat conduction is well taken...

... on the fact that the local reverse flow occurs first in the hub side in most centrifugal blowers with a backswept blade impeller. The three-dimensional boundary layer calculation shows that the increase in wall shear component normal to the main-flow direction markedly decreases the skewed angle of the three...

.... using an adjoint method. The benchmark indicates that if a global optimum exists, the result should be independent of the methodologies or design parameters used. The DMO/RANS method is applied to redesign a three-dimensional centrifugal vaneless diffuser used in a modern generic compressor...

...Gianmario L. Arnulfi; Pietro Giannattasio; Diego Micheli; Piero Pinamonti The present paper reports a numerical–experimental study on the dynamic behavior of a compression system based on a multistage centrifugal blower and fitted with an innovative device for the dynamic suppression of surge...

...Y. K. P. Shum; C. S. Tan; N. A. Cumpsty A study has been conducted, using an unsteady three-dimensional Reynolds-averaged Navier–Stokes simulation, to define the effect of impeller–diffuser interaction on the performance of a centrifugal compressor stage. The principal finding from the study...

... of a high-speed centrifugal compressor. Through the acquisition of both DPIV images and transient pressure data, the time evolution of the unsteady flow during surge is revealed. Contributed by the International Gas Turbine Institute for publication in the ASME JOURNAL OF TURBOMACHINERY . Manuscript...

... stable operating range by 11 percent. This paper elucidates the measured unsteady presurge behavior of the engine, and outlines a systematic procedure for surge control law development. [S0889-504X(00)01803-1] Fink, D. A., 1988, “Surge Dynamics and Unsteady Flow Phenomena in Centrifugal Compressors...

...Pascal Ko¨ppel; Christian Roduner; Peter Kupferschmied; Georg Gyarmathy Typically several hundred million data points arise from a comprehensive measurement campaign carried out in a centrifugal compressor test rig with the fast-response aerodynamic probe system (see Part 1). In order to obtain...