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

Abstract

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.

Axial compressor blades tip leakage flow control using natural aspiration

“…Rotational speed of this model is 2000 rpm and its geometric specifications is introduced in Table 1 . This rotor blades row has already been tested by some researchers like Inoue et al 10 and Taghavi Zenouz et al 11 , experimentally.

Figure 1 Different views of rotor blades row.

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