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196 Gas Turbine Handbook: Principles and Practices
Figure 12-7. Single spool gas turbine estimated parameter changes
with compressor efficiency changes.
Usually the low pressure compressor experiences most of the
compressor fouling. However, ineffective compressor washing will
move much of the debris from the low pressure compressor and redeposit
it in the high pressure compressor. This degrades the high
pressure compressor efficiency. When this occurs the decrease in
compressor efficiency (at constant power) results in a decrease in both
rotor speeds and airflow and an increase in low pressure compressor