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Mechanical Sciences An open-access journal for theoretical and applied mechanics
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Volume 8, issue 1
Mech. Sci., 8, 127-136, 2017
https://doi.org/10.5194/ms-8-127-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Mech. Sci., 8, 127-136, 2017
https://doi.org/10.5194/ms-8-127-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 31 May 2017

Research article | 31 May 2017

Performance of a Low Speed Axial Compressor Rotor Blade Row under Different Inlet Distortions

Reza Taghavi Zenouz, Mehran Eshaghi Sir, and Mohammad Hosein Ababaf Behbahani Reza Taghavi Zenouz et al.
  • School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran

Abstract. Responses of an axial compressor isolated rotor blade row to various inlet distortions have been investigated utilizing computational fluid dynamic technique. Distortions have been imposed by five screens of different geometries, but with the same blockage ratio. These screens were embedded upstream of the rotor blade row. Flow fields are simulated in detail for compressor design point and near stall conditions. Performance curves for distorted cases are extracted and compared to the undisturbed case. Flow simulations and consequent performance characteristics show that the worst cases belong to non-symmetric blockages, i.e., those of partial circumferential configurations. These cases produce the largest wakes which can disturb the flow, considerably. Superior performances correspond to the inner and outer continuous circumferential distortion screens. Since, they produce no significant disturbances to the main flow in comparison to the non-symmetric screens.

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Performance of gas turbine engines are strongly dependent on entrance air flow conditions. In the current work, responses of an axial compressor isolated rotor blade row to various inlet distortions are investigated utilizing computational fluid dynamic technique. Distortions are imposed by five screens of different geometries but with the same blockage ratio. Results showed that the worst cases belong to non-symmetric blockages, i.e., those of partial circumferential configurations.
Performance of gas turbine engines are strongly dependent on entrance air flow conditions. In...
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