...Ben Zhao; Teng Zhou; Ce Yang Surge is a crucial problem for achieving a good working range of centrifugal compressor and power cycle safety. Effective and early detection of the surge is essential to avoid its onset. In this paper, experiments measuring the pressure and acoustic signals have been...

...Fangyuan Lou; Herbert M. Harrison; Nicole L. Key The identification of stall inception mechanisms and stability-limiting components in a centrifugal compressor is required for the development of effective surge suppression approaches. Part I of this two-part paper investigates the surge signature...

...Fangyuan Lou; Herbert M. Harrison; William J. Brown; Nicole L. Key In the first part of the paper, surge signatures and the underlying mechanisms thereof for a high-speed centrifugal compressor were investigated using signals from fast-response transducers installed along the flow path...

...Fangyuan Lou; Nicole L. Key Impeller discharge flow plays an important role in centrifugal compressor performance and operability for two reasons. First, it determines the work factor and relative diffusion for the impeller. Second, it sets the flow into the downstream stationary diffusion system...

.... However, investigations of the pre-stall and stall disturbances in centrifugal compressors remain insufficient owing to the various geometric structures in centrifugal compressors. In this study, a centrifugal compressor with a volute and vaneless diffuser was studied using high-response static pressure...

... incompressible diffuser and von Karman flow (a model of centrifugal compressors). Next, we apply the proposed diagnostic tool to flow in a return channel. A return channel is a part of a multistage centrifugal compressor stage. Its principal function is to remove angular momentum. In this work, we apply...

... by the International Gas Turbine Institute (IGTI) of ASME for publication in the J ournal of T urbomachinery . 19 04 2021 12 08 2021 12 08 2021 27 09 2021 centrifugal compressor inducer incidence impeller diffusion aerodynamics barreled sweep-bow compressor...

...Ruihong Qin; Yaping Ju; Stephen Spence; Chuhua Zhang The advanced design of a centrifugal compressor with high efficiency and wide operating range is a challenging task due to the complex flow field arising from the three-dimensional geometry, especially for the high-speed, highly loaded...

... , minimum losses are shifted to matching coefficients above unity, while losses are generally moderate. Fig. 8 Volute loss map (Ma 4 = 0.25) Volute loss map (Ma4 = 0.25) The flow angle range 30 deg ≤ α 4 ≤ 35 deg is typical for industrial centrifugal compressors...

...Daniel Hermann; Manfred Wirsum; Douglas Robinson; Philipp Jenny Highly efficient and concurrent flexible operation are heavy demands on today's centrifugal compressor units. Diffuser end wall contouring is a measure to delay the incipience of instability and therefore to extend the compressor's...

...Nicolas Poujol; Isabelle Trébinjac; Pierre Duquesne A research centrifugal compressor stage designed and built by Safran Helicopter Engines is tested at three inlet guide vanes (IGV) stagger angles. The compressor stage includes four blade rows: axial inlet guide vanes, a backswept splittered...

... centrifugal compressor is reconstructed using pressure readings from nine static pressure taps placed on the hub of the diffuser. The magnitude and phase information for the first three dominant wavelets are characterized. Additionally, the method shows significant advantages over the traditional averaging...

...Ruihong Qin; Yaping Ju; Lee Galloway; Stephen Spence; Chuhua Zhang The matching and interaction between the impeller and vaned diffuser is the most important aerodynamic-coupling between the components of a high-speed centrifugal compressor. Many research studies have been carried out during...

...Yu Du; Hua-Shu Dou; Fuan Lu Unstable flow in the vaned diffuser of a centrifugal compressor stage near design condition is investigated by numerical simulation. The simulation is performed with the unsteady Navier–Stokes equations and three different turbulence models. Comparisons...

...T. Rossbach; J. Bisping; D. R. Grates; P. Jeschke; A. Hildebrandt; H. Franz This paper presents an analysis of the flow in the return system of a centrifugal compressor with a flow coefficient of 0.15. Based on the detailed experimental and numerical data, the areas of high losses and potentials...

...Jason A. Bourgeois; Robert J. Martinuzzi; Eric Savory; Chao Zhang; Douglas A. Roberts The accurate prediction of mean flow fields with high degrees of curvature, adverse pressure gradients, and three-dimensional turbulent boundary layers typically present in centrifugal compressor stages...

...K. M. Guleren; I. Afgan; A. Turan The turbulent flow inside a low-speed centrifugal compressor at design condition is investigated using large-eddy simulation (LES) comprising of up to 26 × 10 6 computational volume cells. Unlike in the past, the current study’s special emphasis is placed...