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research-article

Influence of Variable Geometry Compressor on Transient Performance of Counter-rotating Open Rotor Engines

[+] Author and Article Information
Vinícius Tavares Silva

Aeronautics Institute of Technology São José dos Campos, São Paulo, 12228-900, Brazil
viniciustasil@gmail.com

Cleverson Bringhenti

ASME Membership Aeronautics Institute of Technology São José dos Campos, São Paulo, 12228-900, Brazil
cleverson@ita.br

Jesuino Takachi Tomita

ASME Membership Aeronautics Institute of Technology São José dos Campos, São Paulo, 12228-900, Brazil
jtakachi@ita.br

Olivier Petit

Chalmers University of Technology Gothenburg SE-41296, Sweden
olivier.petit@chalmers.se

1Corresponding author.

ASME doi:10.1115/1.4040770 History: Received January 16, 2018; Revised June 30, 2018

Abstract

This work describes a methodology used for counter-rotating propellers performance estimation that was implemented in an in-house program for gas turbine performance prediction, making possible the simulation of the counter-rotating open rotor (CROR) architecture. The methodology was used together with a variable geometry compressor control strategy to avoid surge conditions. Two cases were simulated under transient operation for both fixed and variable geometry compressor. The influence of the variable geometry control on the transient performance of CROR engines was evaluated and a comprehensive understanding on the transient behavior of this type of engine could be obtained. Furthermore, it is possible to conclude that by using variable geometry compressor control the surge margin may be avoided without significant changes in performance, ensuring the safe engine operation.

Copyright (c) 2018 by ASME
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