Numerical simulations of flows in centrifugal turbomachinery

Dorney, Daniel J.; Davis, Roger L.; McLaughlin, Dennis K.

doi:10.2514/3.23915

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…This is partially due to the research emphasis on axial flow machines, but also to the difficulty of characterizing centrifugal compressor flowfields at realistic Mach numbers and pressures. Even though today's computational fluid dynamics codes do a fair job of characterizing the primary time-averaged flow features of the centrifugal compressor [5,6], there is clear need for high-resolution unsteady flow data for further advances. Better understanding of the diffuser flowfield is also crucial from a highcycle-fatigue perspective, due to its effect on the diffuser potential field and thus on the forcing function observed by the impeller [7].…”

Section: Introductionmentioning

confidence: 99%

Experimental Transonic Centrifugal Compressor Investigation: Loading Effects on Deterministic Diffuser Velocity Fields

Cukurel

Lawless

Fleeter

2011

Journal of Propulsion and Power

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The future of small gas turbines relies on higher-efficiency and higher-pressure-ratio centrifugal compressors for lighter, more efficient, and reliable designs. An efficient diffuser is essential to the performance, durability, and operability of a modern compressor stage. The diffuser entry flow in a high-speed centrifugal compressor is highly unsteady and complex, featuring shocks, boundary-layer/shock interactions, and large incidence variations imposed on the diffuser vanes. The observed flow structures are not only unsteady, but they are also strongly dependent on the steady compressor-stage loading. To characterize the variation in diffuser flow at different operating points of a modern transonic centrifugal compressor, particle image velocimetry experiments are conducted in the Purdue University high-speed centrifugal compressor facility. The data at all loading conditions demonstrated that the flowfield in the diffuser is characterized by a much more complicated structure than that associated with steady uniform diffusion. The semivaneless-space acceleration region's size is shown to be weakly dependent on loading, whereas the diffuser throat structures are strong functions of the loading condition.

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Section: Introductionmentioning

confidence: 99%

Experimental Transonic Centrifugal Compressor Investigation: Loading Effects on Deterministic Diffuser Velocity Fields

Cukurel

Lawless

Fleeter

2011

Journal of Propulsion and Power

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Signal transduction in mammary tumorigenesis: a transgenic perspective

Dankort

Muller

2000

Oncogene

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Numerical study on the influence of the outlet width of vaneless diffuser on the performance of centrifugal compressor

Pan

2019

J. Phys.: Conf. Ser.

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In this paper, the 3D model of the centrifugal compressor is established by Solidworks software at first. Second, the numerical simulation of the centrifugal compressor is carried out by using CFX software. Combined with the simulation results, the conclusion that properly reducing the outlet width of diffuser can effectively restrain the generation of flow separation and reduce the influence of impeller rotation on diffuser is revealed. Finally, the internal flow field structure and machine performance of the diffuser are improved. The research provides a reference for improving the performance and flow field structure of the compressor as well as the design of the vaneless diffuser.

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Numerical simulations of flows in centrifugal turbomachinery

Cited by 3 publications

References 11 publications

Experimental Transonic Centrifugal Compressor Investigation: Loading Effects on Deterministic Diffuser Velocity Fields

Experimental Transonic Centrifugal Compressor Investigation: Loading Effects on Deterministic Diffuser Velocity Fields

Signal transduction in mammary tumorigenesis: a transgenic perspective

Numerical study on the influence of the outlet width of vaneless diffuser on the performance of centrifugal compressor

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