Investigation of tip clearance phenomena in an axial compressor cascade using Euler and Navier-Stokes procedures

R. F. Kunz, B. Lakshminarayana, A. H. Basson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Three-dimensional Euler and Full Navier-Stokes computational procedures have been utilized to simulate the flow field in an axial compressor cascade with tip clearance. An embedded H-grid topology was utilized to resolve the flow physics in the tip gap region. The numerical procedure employed is a finite difference Runge-Kutta scheme. Available measurements of blade static pressure distributions along the blade span, dynamic pressure and flow angle in the cascade outlet region, and spanwise distributions of blade normal force coefficient and circumferentially averaged flow angle are used for comparison. Several parameters which were varied in the experimental investigations were also varied in the computational studies. Specifically, measurements were taken and computations were performed on the configuration with and without: tip clearance, the presence of an endwall, inlet endwall total pressure profiles and simulated relative casing rotation. Additionally, both Euler and Navier-Stokes computations were performed to investigate the relative performance of these approaches in reconciling the physical phenomena considered. Results indicate that the Navier-Stokes procedure, which utilizes a low Reynolds number k-e model, captures a variety of important physical phenomena associated with tip clearance flows with good accuracy. These include tip vortex strength and trajectory, blade loading near the tip, the interaction of the tip clearance flow with passage secondary flow and the effects of relative endwall motion. The Euler computation provides good but somewhat diminished accuracy in resolution of some of these clearance phenomena. It is concluded that the level of modelling embodied in the present approach is sufficient to extract much of the tip region flow field information useful to designers of turbomachinery.

Original languageEnglish (US)
Title of host publicationTurbomachinery
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791878934
DOIs
StatePublished - 1992
EventASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992 - Cologne, Germany
Duration: Jun 1 1992Jun 4 1992

Publication series

NameASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992
Volume1

Other

OtherASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992
CountryGermany
CityCologne
Period6/1/926/4/92

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Nuclear Energy and Engineering
  • Aerospace Engineering
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Investigation of tip clearance phenomena in an axial compressor cascade using Euler and Navier-Stokes procedures'. Together they form a unique fingerprint.

Cite this