Accession Number:

ADP005472

Title:

Unsteady Inlet Distortion Characteristics with the B-1B

Descriptive Note:

Corporate Author:

ROCKWELL INTERNATIONAL LOS ANGELES CA NORTH AMERICAN AIRCRAFT OPERATIONS

Personal Author(s):

Report Date:

1987-03-01

Pagination or Media Count:

18.0

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 2Environmental 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.

Subject Categories:

  • Aerodynamics
  • Fluid Mechanics
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE