NDLI: The Effects of Radial Inlet on the Performance of Variable Inlet Guide Vanes in a Centrifugal Compressor Stage

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Tan, Jiajian Qi, Datong Wang, Rui
Copyright Year	2010
Abstract	Variable inlet guide vanes (VIGVs) can regulate pressure ratio and mass flow at constant rotational speed in centrifugal compressors as a result of inducing a controlled prewhirl in front of impellers. Radial inlets and VIGVs are typical upstream components in front of the first-stage impellers in many pipeline and multistage centrifugal compressors. However, previous investigations on VIGVs in centrifugal compressors were mostly conducted under the condition of axial inlets, and present work aims to focus on the effects of radial inlet on the VIGVs performance of a centrifugal compressor stage. The axial inlet stage model was compared with the radial inlet stage model using numerical flow simulation. The flow from the radial inlet was nonuniform in both circumferential and radial direction, thus the VIGVs, the impeller, the vaneless diffuser, and the return vane channel were modeled with fully 360-deg passages. The three-dimensional flow field was numerically simulated with FINE™/Turbo at VIGVs setting angles range from −20° to +60°. The overall stage performance parameters were obtained by integrating the field quantities. The simulation results show that the performance of VIGVs was significantly degraded by its inlet flow distortions resulting from a radial inlet. The stage performance map indicates that the overall stage polytropic efficiency decreased by an average of 2.5% and total pressure ratio decreased by an average of 1% because of the flow distortions at different VIGVs setting angles, in comparison with the axial stage model.
Sponsorship	International Gas Turbine Institute
Starting Page	1723
Ending Page	1732
Page Count	10
File Format	PDF
ISBN	9780791844021
DOI	10.1115/GT2010-22177
e-ISBN	9780791838723
Volume Number	Volume 7: Turbomachinery, Parts A, B, and C
Conference Proceedings	ASME Turbo Expo 2010: Power for Land, Sea, and Air
Language	English
Publisher Date	2010-06-14
Publisher Place	Glasgow, UK
Access Restriction	Subscribed
Subject Keyword	Vaneless diffusers Flow simulation Simulation results Pipelines Impellers Inlet guide vanes Compressors Turbochargers Flow (dynamics) Pressure
Content Type	Text
Resource Type	Article

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