Unsteady Inlet Distortion Characteristics with the B-1B

Abstract

An extensive wind tunnel and flight test program has been conducted to verify inlet performance and distortion characteristics on the B-1B aircraft. During the course of these investigations, several unsteady, total-pressure disturbances at various discrete frequencies were encountered: 1) Inlet duct resonance at low power settings; 2)Environmental control system precooler duct resonance; and 3) Nose gear wake ingestion. This resulted in the need to quantify these effects and assess the impact on engine stability characteristics. As a result, engine control features were modified, and aircraft configuration changes were implemented. Results and findings of these investigations are summarized.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1987
Accession Number
ADP005472

Entities

People

  • C. J. Macmiller
  • W. R. Haagenson

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Airframes
  • Boundary Layer
  • Computational Fluid Dynamics
  • Fluid Dynamics
  • High Pressure
  • Hypervelocity Flow
  • Landing Gear
  • Mach Number
  • Measurement
  • Nose Wheels
  • Pressure Measurement
  • Propulsion Systems
  • Swept Wings
  • Turbofan Engines
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Engineering

Readers

  • Aerodynamics/Aeronautics.
  • Combustion and Flow Dynamics.
  • Plasma Physics / Magnetohydrodynamics