The Effects of Wind Tunnel Data Uncertainty on Aircraft Point Performance Predictions

Abstract

A study was conducted to determine the effects of uncertainties in wind tunnel test data on the point performance predictions for a typical fighter at medium altitude and subsonic velocity. The equations of motion of selected parameters were formulated in terms of the aerodynamic coefficients and thrust model. A computer code was written to calculate the performance parameters from the aerodynamic and thrust model inputs. An aerodynamic model closely approaching a typical fighter flying at 30,000 ft mean sea level was developed from wind tunnel, flight test, and flight manual data. The effects of the uncertainties in the aerodynamic coefficients on the performance parameters were determined by varying the aerodynamic coefficients input to the computer code. Keywords: Wind tunnel test data; Aerodynamic coefficients; Computer code.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1989
Accession Number
ADA216091

Entities

People

  • J. D. Cloyd

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Aircrafts
  • Altitude
  • Arm Bones
  • Coefficients
  • Computer Programs
  • Computers
  • Engineering
  • Equations
  • Equations Of Motion
  • Flight Speeds
  • Mach Number
  • Sea Level
  • Test Facilities
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Engineering
  • Physics

Readers

  • Aerospace Engineering
  • Computational Modeling and Simulation
  • Fluid Dynamics.