Three-Dimensional Finite Element Analysis of Aerodynamic Forces Acting on an Oscillating Subsonic Linear Cascade. 2nd Report. Effects of Dihedral Angle, Sweep Angle and Taper Ratio

Nobuhiko Yamasaki, Masanobu Namba

Research output: Contribution to journalArticle

Abstract

In the present paper, the three-dimensional finite element method developed to calculate the aerodynamic forces acting on the vibrating cascade blades in a subsonic flow is applied to various flow conditions and geometrical configurations. The present FEM formulation using pentahedra instead of tetrahedra reproduces perfectly two-dimensional solutions when applied to the spanwise uniform model. Calculations have been made for three-dimensional configurations with various dihedral angles, sweep angles and taper ratios. In most cases, three-dimensional effects due to taper on steady and unsteady aerodynamic forces appear as the effects of decreasing spanwise variation of steady and unsteady forces, respectively, when the angle of attack is uniform along the span. Three-dimensional effect due to taper becomes small when the angle of attack is nonuniform along the span. The effect of dihedral is small compared with the effect of sweep or taper. The effect of sweep on unsteady aerodynamic forces becomes extremely conspicuous when the steady loading is nonuniform along the span.

Original languageEnglish
Pages (from-to)2215-2220
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume59
Issue number563
DOIs
Publication statusPublished - Jan 1 1993

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sweep angle
aerodynamic forces
Dihedral angle
tapering
dihedral angle
Aerodynamics
cascades
Angle of attack
Finite element method
unsteady aerodynamics
Subsonic flow
angle of attack
subsonic flow
configurations
blades
aerodynamics
tetrahedrons
finite element method
formulations

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

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title = "Three-Dimensional Finite Element Analysis of Aerodynamic Forces Acting on an Oscillating Subsonic Linear Cascade. 2nd Report. Effects of Dihedral Angle, Sweep Angle and Taper Ratio",
abstract = "In the present paper, the three-dimensional finite element method developed to calculate the aerodynamic forces acting on the vibrating cascade blades in a subsonic flow is applied to various flow conditions and geometrical configurations. The present FEM formulation using pentahedra instead of tetrahedra reproduces perfectly two-dimensional solutions when applied to the spanwise uniform model. Calculations have been made for three-dimensional configurations with various dihedral angles, sweep angles and taper ratios. In most cases, three-dimensional effects due to taper on steady and unsteady aerodynamic forces appear as the effects of decreasing spanwise variation of steady and unsteady forces, respectively, when the angle of attack is uniform along the span. Three-dimensional effect due to taper becomes small when the angle of attack is nonuniform along the span. The effect of dihedral is small compared with the effect of sweep or taper. The effect of sweep on unsteady aerodynamic forces becomes extremely conspicuous when the steady loading is nonuniform along the span.",
author = "Nobuhiko Yamasaki and Masanobu Namba",
year = "1993",
month = "1",
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TY - JOUR

T1 - Three-Dimensional Finite Element Analysis of Aerodynamic Forces Acting on an Oscillating Subsonic Linear Cascade. 2nd Report. Effects of Dihedral Angle, Sweep Angle and Taper Ratio

AU - Yamasaki, Nobuhiko

AU - Namba, Masanobu

PY - 1993/1/1

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N2 - In the present paper, the three-dimensional finite element method developed to calculate the aerodynamic forces acting on the vibrating cascade blades in a subsonic flow is applied to various flow conditions and geometrical configurations. The present FEM formulation using pentahedra instead of tetrahedra reproduces perfectly two-dimensional solutions when applied to the spanwise uniform model. Calculations have been made for three-dimensional configurations with various dihedral angles, sweep angles and taper ratios. In most cases, three-dimensional effects due to taper on steady and unsteady aerodynamic forces appear as the effects of decreasing spanwise variation of steady and unsteady forces, respectively, when the angle of attack is uniform along the span. Three-dimensional effect due to taper becomes small when the angle of attack is nonuniform along the span. The effect of dihedral is small compared with the effect of sweep or taper. The effect of sweep on unsteady aerodynamic forces becomes extremely conspicuous when the steady loading is nonuniform along the span.

AB - In the present paper, the three-dimensional finite element method developed to calculate the aerodynamic forces acting on the vibrating cascade blades in a subsonic flow is applied to various flow conditions and geometrical configurations. The present FEM formulation using pentahedra instead of tetrahedra reproduces perfectly two-dimensional solutions when applied to the spanwise uniform model. Calculations have been made for three-dimensional configurations with various dihedral angles, sweep angles and taper ratios. In most cases, three-dimensional effects due to taper on steady and unsteady aerodynamic forces appear as the effects of decreasing spanwise variation of steady and unsteady forces, respectively, when the angle of attack is uniform along the span. Three-dimensional effect due to taper becomes small when the angle of attack is nonuniform along the span. The effect of dihedral is small compared with the effect of sweep or taper. The effect of sweep on unsteady aerodynamic forces becomes extremely conspicuous when the steady loading is nonuniform along the span.

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