2008
DOI: 10.2514/1.34817
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Parametric Study of Injection Angle Effects on Stability Enhancement of Transonic Axial Compressors

Abstract: An effective approach in suppressing stall is mass injection upstream of the tip of an axial flow compressor. Developing reliable injection systems for high pressure ratio compressors requires an understanding of the effects of injection parameters, for example, injection angle, on the compressor stability and performance. This paper reports on a numerical investigation of injection angle on the operability of a high-speed compressor rotor. The injection port is set to be choked for all of the injection cases.… Show more

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Cited by 41 publications
(23 citation statements)
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“…The experimental data reported by Dunham [9] are 92.50% of the choking mass flow rate for the near-stall condition and 13.65% for the stall margin. Khaleghi et al [10] described the effects of the injection angle of tip injection combined with a casing groove on the stability enhancement of an axial compressor. Kim et al [11] performed a parametric study of the aerodynamic performance of a transonic axial compressor with a casing groove combined with tip injection using three design parameters: the leading edge length, the trailing edge length, and the height of the casing groove.…”
Section: Introductionmentioning
confidence: 99%
“…The experimental data reported by Dunham [9] are 92.50% of the choking mass flow rate for the near-stall condition and 13.65% for the stall margin. Khaleghi et al [10] described the effects of the injection angle of tip injection combined with a casing groove on the stability enhancement of an axial compressor. Kim et al [11] performed a parametric study of the aerodynamic performance of a transonic axial compressor with a casing groove combined with tip injection using three design parameters: the leading edge length, the trailing edge length, and the height of the casing groove.…”
Section: Introductionmentioning
confidence: 99%
“…The improvement of stability was attributed to the decline in incidence and blade loading at the rotor tip. The unloading effect of tip injection was confirmed by Kefalakis et al 8 in their experimental study and by Cassina et al 9 and Khaleghi et al 10,11 in their independent parametric studies.…”
Section: Introductionmentioning
confidence: 68%
“…Tangential and radial velocities of the modeling boundary were approximately zero, but the axial velocity was close to the injection velocity. The axial distribution of the axial velocity is shown in Figure 2(b) [7].…”
Section: Methodsmentioning
confidence: 99%
“…In addition, the numerical results of steady injection, which was annual uniform injection [7] upstream the rotor, were also given in the content in contrast with unsteady injection results.…”
Section: Rotor Design Parameters and Form Of Injectionmentioning
confidence: 99%
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