FREQUENCY ANALYSIS OF VORTEX SHEDDING IN CASCADE OF AN AXIAL COMPRESSOR IN MODERATE REYNOLDS NUMBERS

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SHOJAEEFARD M.H.; RAJABI ESLAMI M.; ZARE J.

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Journal: JOURNAL OF SOLID AND FLUID MECHANICS Year:2016 | Volume:6 | Issue:1 Page(s): 19-27

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Title

FREQUENCY ANALYSIS OF VORTEX SHEDDING IN CASCADE OF AN AXIAL COMPRESSOR IN MODERATE REYNOLDS NUMBERS

Author(s)

SHOJAEEFARD M.H. | RAJABI ESLAMI M. | ZARE J. | Issue Writer Certificate

Keywords

VORTEX SHEDDING FREQUENCYQ1

AXIAL COMPRESSORQ2

STROUHAL NUMBERQ2

WAKEQ1

Abstract

In this work, measurement and analysis of the dimensionless frequency (Strouhal number) of vortex shedding of an AXIAL COMPRESSOR cascade in moderate Reynolds numbers are carried out. Assessment of these measurements can help a more precise prediction of the WAKE-induced transition on the downstream blades. To measure the flow field in the WAKE, a hot film anemometry is used. The measurements are conducted at three different incidence angles and the Reynolds numbers ranging from 240000 to 530000 based on the blade chord length and flow velocity. Based upon these measurements, there is linear correlation between the vortex shedding and the Reynolds number, and by increasing the Reynolds number, the VORTEX SHEDDING FREQUENCY increases. The results obtained show that the STROUHAL NUMBER for the Reynolds number equal or below 360000 has a lower scattering compared with the Reynolds number above 360000. Also decreasing the attack angle increases the WAKE region. Moreover, the results obtained show that the VORTEX SHEDDING FREQUENCY at moderate and low Reynolds numbers displays different behaviors, which could result in different boundary layer formations at the trailing edge of blades.

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APA: Copy

SHOJAEEFARD, M.H., RAJABI ESLAMI, M., & ZARE, J.. (2016). FREQUENCY ANALYSIS OF VORTEX SHEDDING IN CASCADE OF AN AXIAL COMPRESSOR IN MODERATE REYNOLDS NUMBERS. JOURNAL OF SOLID AND FLUID MECHANICS, 6(1), 19-27. SID. https://sid.ir/paper/212804/en

Vancouver: Copy

SHOJAEEFARD M.H., RAJABI ESLAMI M., ZARE J.. FREQUENCY ANALYSIS OF VORTEX SHEDDING IN CASCADE OF AN AXIAL COMPRESSOR IN MODERATE REYNOLDS NUMBERS. JOURNAL OF SOLID AND FLUID MECHANICS[Internet]. 2016;6(1):19-27. Available from: https://sid.ir/paper/212804/en

IEEE: Copy

M.H. SHOJAEEFARD, M. RAJABI ESLAMI, and J. ZARE, “FREQUENCY ANALYSIS OF VORTEX SHEDDING IN CASCADE OF AN AXIAL COMPRESSOR IN MODERATE REYNOLDS NUMBERS,” JOURNAL OF SOLID AND FLUID MECHANICS, vol. 6, no. 1, pp. 19–27, 2016, [Online]. Available: https://sid.ir/paper/212804/en

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