Volume Dynamics Propulsion System Modeling for Supersonics Vehicle Research

Author:

Kopasakis George1,Connolly Joseph W.1,Paxson Daniel E.1,Ma Peter2

Affiliation:

1. NASA Glenn Research Center, 21000 Brookpark Road, Mail Stop 77-1, Cleveland, OH 44135

2. University of Florida, Gainesville, FL 32611

Abstract

Under the NASA Fundamental Aeronautics Program, the Supersonics Project is working to overcome the obstacles to supersonic commercial flight. The proposed vehicles are long, slim body aircrafts with pronounced aeroservoelastic modes. These modes can potentially couple with propulsion system dynamics, leading to performance challenges such as aircraft ride quality and stability. Other disturbances upstream of the engine generated from atmospheric wind gusts, angle of attack, and yaw can have similar effects. In addition, for optimal propulsion system performance, normal inlet-engine operations are required to be closer to compressor stall and inlet unstart. To study these phenomena, an integrated model is needed that includes both airframe structural dynamics and the propulsion system dynamics. This paper covers the propulsion system component volume dynamics modeling of a turbojet engine that will be used for an integrated vehicle aeropropulsoservoelastic model and for propulsion efficiency studies.

Publisher

ASME International

Subject

Mechanical Engineering

Reference8 articles.

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2. Frederick, D. K., DeCastro, J. A., and Litt, J. S., “User’s Guide for the Commercial Modular Aero-Propulsion System Simulation (C-MAPPS),” NASA Report No. TM-2007-215026.

3. Kehoe, M. , “A Historical Overview of Flight Flutter Testing,” NASA Report No. TM-1995-4720.

4. Experimental Steady and Unsteady Aerodynamic and Flutter Result for HSCT Semispan Models;Silva

5. Seldner, K., Mihaloew, J. R., and Blaha, R. J., 1972, “Generalized Simulation Technique for Turbojet Engine System Analysis,” NASA Report No. TN D-6610.

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