]>
The repository administrator has not yet configured an RDF license.
INVE_MEM_2012_153150.pdf
indexcodes.txt
lightbox.jpg
preview.jpg
medium.jpg
small.jpg
text/html
HTML Summary of #22668
Analytical Calculation of Stall-inception and Surge Points for an Axial-flow Compresor Rotor
Analytical Calculation of Stall-inception and Surge Points for an Axial-flow Compresor Rotor (PDF)
Analytical Calculation of Stall-inception and Surge Points for an Axial-flow Compresor Rotor (Other)
Analytical Calculation of Stall-inception and Surge Points for an Axial-flow Compresor Rotor (Other)
Analytical Calculation of Stall-inception and Surge Points for an Axial-flow Compresor Rotor (Other)
Analytical Calculation of Stall-inception and Surge Points for an Axial-flow Compresor Rotor (Other)
Analytical Calculation of Stall-inception and Surge Points for an Axial-flow Compresor Rotor (Other)
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
4
29
2012
Analytical Calculation of Stall-inception and Surge Points for an Axial-flow Compresor Rotor
Aeronautics
Aeronáutica
López Juste
Gregorio
Gregorio López Juste
Moreno Benavides
Efren
Efren Moreno Benavides
03340082
International Journal of Turbo And Jet Engines