Analytical Calculation of Stall-inception and Surge Points for an Axial-flow Compresor Rotor

Moreno Benavides, Efren and López Juste, Gregorio (2012). Analytical Calculation of Stall-inception and Surge Points for an Axial-flow Compresor Rotor. "International Journal of Turbo And Jet Engines", v. 29 (n. 4); pp. 243-257. ISSN 0334-0082. https://doi.org/10.1515/tjj-2012-0010.

Description

Title: Analytical Calculation of Stall-inception and Surge Points for an Axial-flow Compresor Rotor
Author/s:
  • Moreno Benavides, Efren
  • López Juste, Gregorio
Item Type: Article
Título de Revista/Publicación: International Journal of Turbo And Jet Engines
Date: 2012
ISSN: 0334-0082
Volume: 29
Subjects:
Freetext Keywords: axial compressor, stability, surge, stall, performance, compressor map, stability line, inception
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Motopropulsión y Termofluidodinámica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Recently, a theoretical criterion to calculate the stability of an axial-flow compressor rotor has been presented in the scientific literature. This theoretical criterion was used for determining the locus of the stability line over the rotor map and for predicting the post-stall evolution of the constant-speed line of a rotor. The main objective of this paper is to improve the predictions of such a model. To do that, the paper proposes a different characterization of the characteristic azimuthal length and a calculation of the ratio of specific heats based on a polytropic exponent. Thanks to these new values, the model predicts two bifurcation points in the behaviour of the flow: the inception point of the instability and the surge point. Experimental data from a pure axial compressor are used to validate the model showing that the prediction of the flow coefficient at the surge point has an error inferior to 5%. For the rotor studied, the paper provides a quantitative and qualitative description of the inception of the instability and of the mechanism involved in the instable region of the compressor map. The paper also discusses the role of rotor efficiency in the position of the bifurcations and gives a sensitivity analysis of its position. Finally, it presents a discussion about how the model can explain the different behaviours exhibited by the same rotor when the flow coefficient is reduced

More information

Item ID: 22668
DC Identifier: http://oa.upm.es/22668/
OAI Identifier: oai:oa.upm.es:22668
DOI: 10.1515/tjj-2012-0010
Official URL: http://www.degruyter.com/view/j/tjj.2012.29.issue-4/tjj-2012-0010/tjj-2012-0010.xml
Deposited by: Memoria Investigacion
Deposited on: 12 Nov 2014 17:43
Last Modified: 12 Nov 2014 17:43
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