Effects of tip-gap size on the tip-leakage flow in a turbomachinery cascade
By Donghyun You, Meng Wang, Parviz Moin, Rajat Mittal. 2006
147 citations recorded by the source corpus.
The effects of tip-gap size on the tip-leakage vortical structures and velocity and pressure fields are investigated using large-eddy simulation, with the objective of providing guidelines for controlling tip-leakage cavitation and viscous losses associated with the tip-leakage flow. The effects of tip-gap size on the generation and evolution of the end-wall vortical structures are discussed by investigating their evolutionary trajectories and the mean velocity field. The tip-leakage jet and tip-leakage vortex are found to produce significant mean velocity gradients, leading to the production of vorticity and turbulent kinetic energy. Inside the cascade passage, the peak streamwise velocity deficit and magnitudes of vorticity and turbulent kinetic energy in the tip-leakage vortex are reduced as the tip-gap size decreases. The present analysis indicates that the mechanisms for the generation of vorticity and turbulent kinetic energy are mostly unchanged by the tip-gap size variation. However, larger tip-ga...
Subfields: Aerospace Engineering, Computational Mechanics
View Paper: https://www.semanticscholar.org/paper/c08ed45823d071817e75275be54feefa58c921e8
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In Aerospace Engineering
In Computational Mechanics
Citations in the corpus
- Measurements of the tip leakage vortex structures and turbulence in the meridional plane of an axial water-jet pump (2011, background): “Large eddy simulations (LES) has also been implemented by Jang et al. (2001a, b), who find that TLV breakdown induces high-pressure fluctuations on the rotor blade, and You et al. (2006) , who demonstrate that the TLV structure depends heavily on the rotor”