Campus Units

Mechanical Engineering

Document Type

Conference Proceeding

Conference

AIAA Propulsion and Energy Forum

Publication Version

Published Version

Publication Date

2018

Journal or Book Title

2018 Joint Propulsion Conference

First Page

4657

DOI

10.2514/6.2018-4657

Conference Title

2018 Joint Propulsion Conference

Conference Date

July 9-11, 2018

City

Cincinnati, OH

Abstract

Gas turbine engines are generally optimized to operate at nearly a fixed speed with fixed blade geometries for the design operating condition. The performance of gas turbine reduces when operated at different operating condition. In this work, we present a parametric study to optimize gas-turbine performance under off-design conditions by articulating the rotor blades in both clockwise and counterclockwise directions. Articulating the pitch angle of turbine blades in coordination with adjustable nozzle vanes can improve performance by maintaining flow incidence angles within the optimum range at certain off-design conditions. To observe the effect of rotor pitching on the performance of the gas turbine, a computational fluid dynamics (CFD) study is performed using the finite element formulation for compressible flows with moving domain. Results obtained from the CFD simulation for different rotor pitch angles are presented in this paper.

Comments

This proceeding was published as Rajanna, Manoj R., Fei Xu, Ming-Chen Hsu, Yuri Bazilevs, Muthuvel Murugan, Anindya Ghoshal, and Luis G. Bravo. "Optimizing Gas-Turbine Operation using Finite-Element CFD Modeling." In 2018 Joint Propulsion Conference, (2018): 4657. doi: 10.2514/6.2018-4657 . Posted with permission.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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