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http://dx.doi.org/10.5916/jkosme.2009.33.5.686

Flow Analysis in the Tip Clearance of Axial Flow Rotor Using Finite-Element Large-Eddy Simulation Method  

Lee, Myeong-Ho (서울산업대학교 기계공학과)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.33, no.5, 2009 , pp. 686-695 More about this Journal
Abstract
Flow characteristics in linear axial cascade have been studied using large eddy simulation(LES) based on finite element method(FEM) to investigate details of the leakage flow in the tip clearance of axial flow rotor. STAR-CD(FVM) and PAT-Flow(FEM) have been adopted to solve the Navier-Stokes equations for the simulation of the unsteady turbulent flow. Numerical results from the present study have been compared with the existing experimental results to investigate a tip clearance effect on velocity profile and static pressure distribution on blade surface at various spanwise positions. Both simulation results agree well with the experimental data. However, it has been shown that the results of finite-element large-eddy simulation agree better with experimental data than $k-{\varepsilon}$ turbulent model based on finite volume method regarding the tip vortex geometry and static pressure distribution at the center of the tip vortex core. As a result of this study, it is shown that finite-element large-eddy simulation method can predict more exactly on the tip leakage vortex flow and behind flow field.
Keywords
Axial flow rotor; Tip clearance; Leakage flow; Large eddy simulation; Finite element method;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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