Application of Active Core Exhaust Control to Elliminate the Core Thrust Reverser on Heavy Lift Aircraft

Abstract

Pulsed jet blowing for mixing enhancement in a hot jet is examined using numerical simulation. Numerical simulations have been completed for a sub-scale turbojet engine a full scale ground demonstration case and a High-Bypass Ratio Engine (HBRE). These simulations have shown that pulsed jet blowing can significantly reduce jet plume potential core lengths at static and forward flight conditions. The numerical scheme utilizes large timestep implicit integration for efficiency and a second order physical space algorithm for robustness. The pulsed jet disturbance is calculated directly and a turbulence model is employed to represent the cascade to smaller length scales. Experimental data corresponding to the numerical simulations are also presented and indicate similar benefits from pulsed jet mixing.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2001
Accession Number
ADP011108

Entities

People

  • Clarence F. Chenault
  • John D. Dorris

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Aircrafts
  • Airframes
  • Boundary Layer
  • Computational Fluid Dynamics
  • Fluid Dynamics
  • Mach Number
  • Mass Flow
  • Military Aircraft
  • Military Research
  • Steady State
  • Three Dimensional
  • Turbines
  • Turbofan Engines
  • Turbojet Engines
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster