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Analytical Surge Behaviors in Systems of a Single-stage Axial Flow Compressor and Flow-paths
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 Title & Authors
Analytical Surge Behaviors in Systems of a Single-stage Axial Flow Compressor and Flow-paths
Yamaguchi, Nobuyuki;
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 Abstract
Behaviors of surges appearing near the stall stagnation boundaries in various fashions in systems of a single-stage compressor and flow-path systems were studied analytically and were tried to put to order. Deep surges, which enclose the stall point in the pressure-mass flow plane, tend to have either near-resonant surge frequencies or subharmonic ones. The subharmonic surge is a multiple-loop one containing, for example, in a (1/2) subharmonic one, a deep surge loop and a mild surge loop, the latter of which does not enclose the stall point, staying only within the stalled zone. Both loops have nearly equal time periods, respectively, resulting in a (1/2) subharmonic surge frequency as a whole. The subharmonic surges are found to appear in a narrow zone neighboring the stall stagnation boundary. In other words, they tend to appear in the final stage of the stall stagnation process. It should be emphasized further that the stall stagnation initiates fundamentally at the situation where a volume-modified reduced resonant-surge frequency becomes coincident with that for the stagnation boundary conditions, where the reduced frequency is defined by the acoustical resonance frequency in the flow-path system, the delivery flow-path length and the compressor tip speed, modified by the sectional area ratio and the effect of the stalling pressure ratio. The real surge frequency turns from the resonant frequency to either near-resonant one or subharmonic one, and finally to stagnation condition, for the large-amplitude conditions, caused by the non-linear self-excitation mechanism of the surge.
 Keywords
Fluid Machine;Axial Flow Compressor;Surge;Analytical Simulation;Frequency;Fluid Dynamics;
 Language
English
 Cited by
 References
1.
Greitzer, E. M., 1976, "Surge and Rotating Stall in Axial Flow Compressors, Part I and II," ASME, Journal of Engineering for Power, Vol. 98, 1976-4, pp. 190-198 and pp. 199-217 crossref(new window)

2.
Corbett, A. G. and Elder, R. L., Mathematical Modeling of Compressor Stability in Steady and Unsteady Flow Conditions, in "Unsteady Phenomena in Turbomachinery," AGARD-CP-177

3.
Davis, Jr., M. W., and O'Brien, W. F., 1987, A Stage-by-Stage Post-Stall Compression System Modeling Technique, AIAA-87-2088

4.
Boyer, K. M., and O'Brien, W. F., 1989, Model Predictions for Improved Recoverability of a Multi-Stage Axial-Flow Compressor, AIAA-89-2687

5.
Yamaguchi, N., 2013, Analytical Study on Stall Stagnation Boundaries in Axial-Flow Compressor and Duct Systems, International Journal of Fluid Machinery and Systems, Vol. 6, No. 2, pp. 56-74 crossref(new window)

6.
Yamaguchi, N., 2013, Development of a Simulation Method of Surge Transient Flow Phenomena in a Multistage Axial Flow Compressor and Duct System, International Journal of Fluid Machinery and Systems, Vol. 6, No.4, pp. 189-199 crossref(new window)

7.
Yamaguchi, N., 2014, Surge Phenomena Analytically Predicted in a Multi-stage Axial Flow Compressor System in the Reduced-Speed Zone, International Journal of Fluid Machinery and Systems, Vol. 7, No.3, pp. 110-124 crossref(new window)

8.
Yamaguchi, N., 2014, A Study on the Fundamental Surge Frequencies in Multi-Stage Axial Flow Compressor Systems, International Journal of Fluid Machinery and Systems, Vol. 7, No.4, pp. 160-173 crossref(new window)