Journal ArticleDOI
Tip Leakage Flow in Linear Compressor Cascade
S. Kang,Charles Hirsch +1 more
TLDR
In this paper, a linear compressor cascade of NACA 65-1810 profiles is inuestigated, for tip clearance levels of 7.0, 2.0 and 3.25 percent of chord at design and off-design flow conditions.Abstract:
Tip leakage flow in a linear compressor cascade of NACA 65-1810 profiles is inuestigated, for tip clearance levels of 7.0, 2.0, and 3.25 percent of chord at design and off-design flow conditions. Velocity and pressure data are collected from three transverse sections inside tip clearance and sixteen sections within flow passage. Tip separation vortex influence is identified from the data. Leakage flow mixing is clearly present inside the clearance and has a significant influence on the internal lossread more
Citations
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Journal ArticleDOI
Large-eddy simulation analysis of mechanisms for viscous losses in a turbomachinery tip-clearance flow
TL;DR: In this paper, the tip-leakage flow in a turbomachinery cascade is studied using large-eddy simulation with particular emphasis on understanding the underlying mechanisms for viscous losses in the vicinity of the tip gap.
Journal ArticleDOI
Computational Methodology for Large-Eddy Simulation of Tip-Clearance Flows
TL;DR: A large-eddy-simulation-based flow solver that combines an immersed boundary technique with a curvilinear structured grid has been developed to study the temporal and spatial dynamics of an incompressible rotor-tip-clearance flow as discussed by the authors.
Journal ArticleDOI
RANS and LES computations of the tip-leakage vortex for different gap widths
TL;DR: In this paper, the influence of the gap width on the development of the tip-leakage vortex is investigated. And a law that matches the vortex trajectory from the leading edge to the mid-chord is proposed to determine, in case of cavitation, if the tip vortex will interact with the walls and cause erosion.
Journal ArticleDOI
Wake of a Compressor Cascade with Tip Gap, Part 1: Mean Flow and Turbulence Structure
TL;DR: In this article, the authors used a linear cascade to model the vortex-dominated endwall flows found in aircraft engine fans and compressors, where detailed turbulence measurements can be made and the relative motion between blade tip and casing can be simulated.
Journal ArticleDOI
Wake of a Compressor Cascade with Tip Gap, Part 2: Effects of Endwall Motion
Yu Wang,William J. Devenport +1 more
TL;DR: The effects of relative motion between the blade tips and endwall on the flow downstream of a linear compressor cascade have been studied in this paper, where the effect of endwall motion was simulated by using a 0.25mm-thick Mylar belt propelled by a sliding surface beneath the tips of the cascade blades.
References
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Journal ArticleDOI
The measurement and formation of tip clearance loss
TL;DR: In this article, the tip clearance loss from the leading to trailing edge of a linear turbine cascade was measured and the contributions made by mixing, internal gap shear flow, and endwall/secondary flow were identified, separated, and quantified for the first time.
Journal ArticleDOI
Tip Leakage Flow in Axial Compressors
J. A. Storer,N. A. Cumpsty +1 more
TL;DR: In this paper, a linear cascade with tip clearance is complemented by numerical solutions of the three-dimensional Navier-Stokes equations in an investigation of tip leakage flow, and detailed comparisons show that the mechanism of leakage is primarily inviscid.
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Structure of Tip Clearance Flow in an Isolated Axial Compressor Rotor
Masahiro Inoue,Motoo Kuroumaru +1 more
TL;DR: In this paper, aperiodic multisampling technique with a hot wire in the clearance and with a high-response pressure sensor on the casing wall was used to obtain ensemble-averaged and phase-locked flow patterns in various tip clearances of two axial compressor rotors.
Journal ArticleDOI