Journal ArticleDOI
A Comparison Between the Design Point and Near-Stall Performance of an Axial Compressor
TLDR
In this article, the rotor tip clearance was found to control the performance of the axial compressor by influencing the flow within the rotor blade passages, and the importance of the flow in the endwall regions in determining the overall compressor performance.Abstract:
Detailed measurements have been made within an axial compressor operating both at design point and near stall. Rotor tip clearance was found to control the performance of the machine by influencing the flow within the rotor blade passages. This was not found to be the case in the stator blade row, where hub clearance was introduced beneath the blade tips. Although the passage flow was observed to be altered dramatically, no significant changes were apparent in the overall pressure rise or stall point.Small tip clearances in the rotor blade row resulted in the formation of corner separations at the hub, where the blade loading was highest. More representative clearances resulted in blockage at the tip due to the increased tip clearance flow. The effects which have been observed emphasize both the three dimensional nature of the flow within compressor blade passages, and the importance of the flow in the endwall regions in determining the overall compressor performance.Copyright © 1989 by ASMEread more
Citations
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Journal ArticleDOI
Experimental and Computational Investigation of the Tip Clearance Flow in a Transonic Axial Compressor Rotor
TL;DR: In this article, the role of the passage shock/leakage vortex interaction in generating endwall blockage is discussed, as a result of the shock/vortex interaction at design speed, the radial influence of the tip clearance flow extends to 20 times the physical tip clearance height.
Journal ArticleDOI
The Effects of Tip Leakage Flow on the Performance of Multistage Compressors Used in Small Core Engine Applications
Reid A. Berdanier,Nicole L. Key +1 more
TL;DR: In this paper, a three-stage axial compressor with three-tip clearance heights representative of current and future small core machines is evaluated using clearance derivatives, and the summarized data presented here begin to narrow the margin of tip clearance sensitivities outlined by previous studies in an effort to inform future compressor designs.
Journal ArticleDOI
The evolution of the flow topologies of 3D separations in the stator passage of an axial compressor stage
TL;DR: In this paper, 3D separation flows were studied in the stator of a low-speed compressor test facility, and the results obtained based on the topological analyses of the oil-flow visualization pictures were validated by using the measured results of stereoscopic particle image velocimetry.
Journal ArticleDOI
Experimental investigation of the effect of rotor tip gaps on 3D separating flows inside the stator of a highly loaded compressor stage
TL;DR: In this paper, the 3D separation and vortex flow structures in the stator at different operating conditions are analyzed by changing the size of the rotor tip gap, six groups of oil-flow pictures are obtained to study the effect of rotor gaps on the 3d separating flows in the downstream stator.
Journal ArticleDOI
Design Optimization of Casing Grooves Using Zipper Layer Meshing
TL;DR: Shahpar et al. as discussed by the authors developed a new algorithm, named the zipper layer method, to link multiblock meshes for groove-casing optimization applications, which not only improves the stall margin (SM) of the rotor but also maintains its peak efficiency.
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