A Novel Quasi-3D Method for Cascade Flow Considering Axial Velocity Density Ratio
-
Zhiqiang Chen
und
Xudong Huang
Abstract
A novel quasi-3D Computational Fluid Dynamics (CFD) method of mid-span flow simulation for compressor cascades is proposed. Two dimension (2D) Reynolds-Averaged Navier-Stokes (RANS) method is shown facing challenge in predicting mid-span flow with a unity Axial Velocity Density Ratio (AVDR). Three dimension (3D) RANS solution also shows distinct discrepancies if the AVDR is not predicted correctly. In this paper, 2D and 3D CFD results discrepancies are analyzed and a novel quasi-3D CFD method is proposed. The new quasi-3D model is derived by reducing 3D RANS Finite Volume Method (FVM) discretization over a one-spanwise-layer structured mesh cell. The sidewall effect is considered by two parts. The first part is explicit interface fluxes of mass, momentum and energy as well as turbulence. The second part is a cell boundary scaling factor representing sidewall boundary layer contraction. The performance of the novel quasi-3D method is validated on mid-span pressure distribution, pressure loss and shock prediction of two typical cascades. The results show good agreement with the experiment data on cascade SJ301-20 and cascade AC6-10 at all test condition. The proposed quasi-3D method shows superior accuracy over traditional 2D RANS method and 3D RANS method in performance prediction of compressor cascade.
Acknowledgements
AnPing Hou is greatly appreciated for supplying experimental instrument and permission to use cascade SJ301-20.
Nomenclature
- AVDR
Axial Velocity Density Ratio
- RANS
Reynolds-averaged Navier-Stokes
- CFD
Computational Fluid Dynamics
- SST
Shear Stress Transport
- FVM
Finite volume method
- APG
Adverse Pressure Gradient
Face flux vectors of finite volume method
Conserved variable vector
Normal unity vector
Density
Cartesian velocities
Pressure
Boundary layer thickness
Boundary layer displacement thickness
Cartesian coordinates
Cascade span height
Incidence angle
Flow angle
Cascade chord length
Cascade pitch distance
Mass-flow of airflow at inlet
Mass-flow of airflow at outlet
Static pressure at outlet plane
Total pressure at inlet plane
Total temperature at inlet plane
Overall total pressure loss coefficient
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© 2018 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Mechanism of Film Cooling with One Inlet and Double Outlet Hole Injection at Various Turbulence Intensities
- State of Aircraft Turboshaft Engines by Means of Tribotechnical Diagnostic
- Theoretical Study of the Vibration Suppression on a Mistuned Bladed Disk Using a Bi-periodic Piezoelectric Network
- Effect of Axisymmetric Aft Wall Angle Cavity in Supersonic Flow Field
- A Generalized Method for the Comparable and Rigorous Calculation of the Polytropic Efficiencies of Turbocompressors
- Sliding Mode Fault Tolerant Control with Adaptive Diagnosis for Aircraft Engines
- Numerical Study on the Improvement of Oil Return Structure in Aero-Engine Bearing Chambers
- Numerical Investigation of Fuel Distribution Effect on Flow and Temperature Field in a Heavy Duty Gas Turbine Combustor
- A Novel Quasi-3D Method for Cascade Flow Considering Axial Velocity Density Ratio
Artikel in diesem Heft
- Frontmatter
- Mechanism of Film Cooling with One Inlet and Double Outlet Hole Injection at Various Turbulence Intensities
- State of Aircraft Turboshaft Engines by Means of Tribotechnical Diagnostic
- Theoretical Study of the Vibration Suppression on a Mistuned Bladed Disk Using a Bi-periodic Piezoelectric Network
- Effect of Axisymmetric Aft Wall Angle Cavity in Supersonic Flow Field
- A Generalized Method for the Comparable and Rigorous Calculation of the Polytropic Efficiencies of Turbocompressors
- Sliding Mode Fault Tolerant Control with Adaptive Diagnosis for Aircraft Engines
- Numerical Study on the Improvement of Oil Return Structure in Aero-Engine Bearing Chambers
- Numerical Investigation of Fuel Distribution Effect on Flow and Temperature Field in a Heavy Duty Gas Turbine Combustor
- A Novel Quasi-3D Method for Cascade Flow Considering Axial Velocity Density Ratio
