Brayton Cycle Engine/component Performance Assessment using Energy and Thrust-Based Methods

Abstract

This investigation summarizes a comparative study of two high-speed engine performance assessment techniques based on exergy (available work) and thrust- potential (thrust availability). Simple flow-fields utilizing Rayleigh heat addition and one-dimensional flow with friction are used to demonstrate the fundamental inability of conventional exergy techniques to predict engine component performance, aid in component design, or accurately assess flow losses. The use of the thrust- based method on these same examples demonstrates its ability to yield useful information in ail these categories. The conventional definition of exergy includes work which is inherently unavailable to an aerospace Brayton engine. An engine-based exergy is then developed which accurately accounts for this inherently unavailable work; performance parameters based on this quantity are then shown to yield design and loss information equivalent to the thrust-based method.

Department(s)

Mechanical and Aerospace Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 The Authors, All rights reserved.

Publication Date

01 Jan 1996

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