Abstract
In this paper are presented the blade vibration characteristics at the starting conditions of the low pressure multistage axial compressor of heavy-duty 100 MW gas turbine. Vibration data have been collected through strain gauges during aerodynamic tests of the model compressor. The influences of operating modes at the starting conditions are investigated upon the compressor blade vibrations. The exciting mechanisms and features of blade vibrations are investigated at the surge, rotating stall, and buffeting flutter. The influences of operating modes upon blade dynamic stresses are investigated for the first and second stages. It is shown that a high dynamic stress peak of 120 MPa can occur in the first stage blades due to resonances with stall cell excitations or with inlet strut wake excitations at the stalled conditions.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Abbreviations
- Cz :
-
Mean axial flow speed
- H:
-
Stage work
- U:
-
Blade tip speed
- n :
-
Compressor rotating speed
- \(\bar n\) :
-
Relative compressor speed,n/n des
- \(\dot m\) :
-
Mass flow rate
- \(\dot m_{eq} \) :
-
Equivalent mass flow,\(\dot m\sqrt {T_i } /P_i \)
- P :
-
Total pressure
- P :
-
Pressure ratio,P/P i
- T :
-
Temperature
- ψ:
-
Pressure coefficient,2H u 2
- ϕ:
-
Flow coefficient,C z/u
- \(\bar \varphi \) :
-
Relative flow coefficient,ϕ/ϕ des
- des:
-
At the design point
- eq:
-
Equivalent
- i:
-
Inlet
References
Ishihara, K. and Funakawa, M., 1980, “Experimental Investigations on the Vibration of Blades Due to a Rotating Stall,”Bulletin of the JSME, Vol. 23, No. 177, pp. 353–360.
Ki, J. Y. and Chung, S. C, 2002, “Performance Simulation of a Turboprop Engine for Basic Trainer,”KSME International Journal, Vol. 16, No. 6, pp. 839–850.
Kulagina, V. A., 1976, “Some Features of Blade Oscillations at Conditions of a Rotated Stall,”Problems of Strength, Kiev, No. 3, pp. 45–48.
Rusanova, E. I., 1958, “The Analysis of Mea- surement Results of Dynamic Stresses in Blades of Axial Compressors,”Transactions of Scientifically Engineering Society of Ship Industry, Vol. 8, No. 1, pp. 133–159.
Samoylovict, G. S., 1975, “Excitation of Blade Oscillations of Turbomachines,” Moscow.
Shannon, J. F., 1954, “Vibration Problems in Gas Turbines, Centrifugal and Axial-Flow Com- pressors,” H. M. Stationary Office, London, R. and M. No. 2226.
Vedichtchev, A. F. and Titenskiy, V. I., 1983, “Heightening of Vibrational Reliability of Rotor Blades in Axial Compressors at Starting Conditions,” The theses of the reports 9, All-Union Conference on Aeroelasticity Turbomachines, Novosibirsk.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Lee, A.S., Vedichtchev, A.F. LP compressor blade vibration characteristics at starting conditions of a 100 MW heavy-duty gas turbine. KSME International Journal 18, 895–903 (2004). https://doi.org/10.1007/BF02990861
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02990861