EXPERIMENTAL INVESTIGATION OF AIR INJECTION EFFECTS ON ROTATING STALL ALLEVIATION IN AN AXIAL COMPRESSOR

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TAGHAVI ZENOUZ REZA; ABABAF BEHBAHANI MOHAMMAD HOSEIN; KHOSHNEJAD ALI

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:7 Page(s): 267-274

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Title

EXPERIMENTAL INVESTIGATION OF AIR INJECTION EFFECTS ON ROTATING STALL ALLEVIATION IN AN AXIAL COMPRESSOR

Author(s)

TAGHAVI ZENOUZ REZA | ABABAF BEHBAHANI MOHAMMAD HOSEIN | KHOSHNEJAD ALI | Issue Writer Certificate

Keywords

AXIAL COMPRESSORQ2

STALL INCEPTIONQ1

TIP INJECTIONQ1

STALL MARGINQ1

Abstract

Rotating stall alleviation in an AXIAL COMPRESSOR with deployment of air injection at its rotor blade row tip region has been experimentally investigated. Twelve air injectors were mounted evenly spaced around the compressor casing upstream the rotor blade row. Initially, improvement of the compressor overall performance was examined through air injection, especially at stall point condition. Instantaneous flow velocities at various radial and circumferential positions were measured simultaneously utilizing hot wire anemometry. Results obtained from these latter measurements together with signal frequency analyses, provided to describe the STALL INCEPTION process and consequent flow induced fluctuations and also stall alleviation during the air injection process. Results show that a small amount of air injection at the rotor blade tip region can affect the rise in total pressure and more specifically, increase the compressor STALL MARGIN efficiently. Air injection of less than 1% of the compressor main flow rate through the injectors has improved the STALL MARGIN by 9%. Air injection at the blade row tip enables this beneficial effects to extend throughout the blade whole span, especially while working at the near stall conditions.

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APA: Copy

TAGHAVI ZENOUZ, REZA, ABABAF BEHBAHANI, MOHAMMAD HOSEIN, & KHOSHNEJAD, ALI. (2016). EXPERIMENTAL INVESTIGATION OF AIR INJECTION EFFECTS ON ROTATING STALL ALLEVIATION IN AN AXIAL COMPRESSOR. MODARES MECHANICAL ENGINEERING, 16(7), 267-274. SID. https://sid.ir/paper/178335/en

Vancouver: Copy

TAGHAVI ZENOUZ REZA, ABABAF BEHBAHANI MOHAMMAD HOSEIN, KHOSHNEJAD ALI. EXPERIMENTAL INVESTIGATION OF AIR INJECTION EFFECTS ON ROTATING STALL ALLEVIATION IN AN AXIAL COMPRESSOR. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(7):267-274. Available from: https://sid.ir/paper/178335/en

IEEE: Copy

REZA TAGHAVI ZENOUZ, MOHAMMAD HOSEIN ABABAF BEHBAHANI, and ALI KHOSHNEJAD, “EXPERIMENTAL INVESTIGATION OF AIR INJECTION EFFECTS ON ROTATING STALL ALLEVIATION IN AN AXIAL COMPRESSOR,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 7, pp. 267–274, 2016, [Online]. Available: https://sid.ir/paper/178335/en

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