Fan/Ram Duct Program

Abstract

The Phase I program described in this report is the initial 12-month effort of a planned three-phase program. It started with an analysis of the aerodynamics of the combination fan duct/ram duct used in the P and WA (trade mark) STFRJ368 turbofan-ramjet study engine. This was followed by the design of an aerodynamic test rig simulating the fan/ram duct configuration, including a model fan. The rig will be tested in Phase II to provide aerodynamic data (loss coefficients, flow profiles, etc.) at various steady-state points during the transition from turbofan to ramjet. A digital dynamic engine simulation computer program was also formulated and checked out during Phase I. The checkout of the program was carried through transient transition test cases to validate the simulation. However, the test cases are not designed or optimized transitions; they illustrate that the computer program is operational. The computer program will then be used for transition control studies in later phases to define the control system and logic required for engine operation and smooth, stable transition from turbofan to ramjet and vice-versa.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1973
Accession Number
ADB022802

Entities

People

  • Al Levesque
  • Daniel E. Booz
  • Edward B. Thayer

Organizations

  • Pratt & Whitney

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Coefficients
  • Combustion
  • Computer Programs
  • Computers
  • Control Systems
  • Engine Components
  • Engines
  • Gas Flow
  • Gas Turbines
  • Guide Vanes
  • Heat Transfer
  • Ramjet Engines
  • Simulations
  • Static Pressure
  • Steady State
  • Turbines
  • Turbofan Engines

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Combustion and Flow Dynamics.
  • Computational Fluid Dynamics (CFD)