Application of Rotorcraft Flight Simulation Program (C81) to Predict Rotor Performance and Bending Moments for a Model Four-Bladed Articulated Rotor System

Abstract

Four sets of model H-34 helicopter rotor blades were built and tested by the Sikorsky Aircraft Corporation. Rotorcraft Flight Simulation Program with Aeroelastic Rotor Representation, Program C81, was used to predict rotor performance and blade bending moments for comparison with the test results. Performance predictions made using the steady-state two-dimensional airfoil data (GFE) supplied by the Army for the model airfoils showed stall characteristics at much lower rotor lift levels than recorded in the tunnel test. Application of unsteady aerodynamic and yawed flow effects did not sufficiently improve the performance correlation. The lift and stall characteristics of the model rotor in the tunnel were found to be very similar to full-scale 0012 airfoil properties.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1974
Accession Number
ADA004015

Entities

People

  • F. D. Freeman
  • R. L. Bennett

Organizations

  • Bell Flight

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aerodynamic Lift
  • Bending Moments
  • Computational Science
  • Computer Programs
  • Computers
  • Correlation Analysis
  • Data Science
  • Information Science
  • Mechanics
  • Regression Analysis
  • Rotary Wing Aircraft
  • Statistical Analysis
  • Three Dimensional
  • Trailing Edges
  • Two Dimensional
  • Unsteady Aerodynamics

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Aerospace Engineering
  • Computational Fluid Dynamics (CFD)