Compressor Stability Enhancement Using Discrete Tip Injection
Author:
Suder Kenneth L.1, Hathaway Michael D.2, Thorp Scott A.3, Strazisar Anthony J.3, Bright Michelle B.3
Affiliation:
1. NASA Glenn Research Center, Cleveland, OH 44135 2. US Army Vehicle Technology Directorate, Cleveland, OH 44135 3. NASA Glenn Research Center, Cleveland, OH 44135
Abstract
Mass injection upstream of the tip of a high-speed axial compressor rotor is a stability enhancement approach known to be effective in suppressing stall in tip-critical rotors. This process is examined in a transonic axial compressor rotor through experiments and time-averaged Navier-Stokes CFD simulations. Measurements and simulations for discrete injection are presented for a range of injection rates and distributions of injectors around the annulus. The simulations indicate that tip injection increases stability by unloading the rotor tip and that increasing injection velocity improves the effectiveness of tip injection. For the tested rotor, experimental results demonstrate that at 70 percent speed the stalling flow coefficient can be reduced by 30 percent using an injected massflow equivalent to 1 percent of the annulus flow. At design speed, the stalling flow coefficient was reduced by 6 percent using an injected massflow equivalent to 2 percent of the annulus flow. The experiments show that stability enhancement is related to the mass-averaged axial velocity at the tip. For a given injected massflow, the mass-averaged axial velocity at the tip is increased by injecting flow over discrete portions of the circumference as opposed to full-annular injection. The implications of these results on the design of recirculating casing treatments and other methods to enhance stability will be discussed.
Publisher
ASME International
Subject
Mechanical Engineering
Reference31 articles.
1. Prince, D. C., Jr., Wisler, D. D., and Hivers, D. E., 1974, “Study of Casing Treatment Stall Margin Improvement,” NASA CR-134552. 2. Takata, H., and Tsukuda, Y., 1977, “Stall Margin Improvement by Casing Treatment—Its Mechanism and Effectiveness,” ASME J. Eng. Power, 99, pp. 121–133. 3. Crook, A. J., Greitzer, E. M., Tan, C. S., and Adamczyk, J. J., 1993, “Numerical Simulation of Compressor Endwall and Casing Treatment Flow Phenomena,” ASME J. Turbomach., 115, pp. 501–512. 4. Paduano, J. D., Epstein, A. H., Valavani, L., Longley, J. P., Greitzer, E. M., and Guenette, G. R., 1993, “Active Control of Rotating Stall in a Low Speed Axial Compressor Rotor,” ASME J. Turbomach., 115, pp. 48–56. 5. van Schalkwyk, C. M., Paduano, J. D., Greitzer, E. M., and Epstein, A. H., 1998, “Active Stabilization of Axial Compressors With Circumferential Inlet Distortion,” ASME J. Turbomach., 120, pp. 431–439.
Cited by
132 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|