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Gas Turbine Handbook : Principles and Practices

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222 <strong>Gas</strong> <strong>Turbine</strong> <strong>H<strong>and</strong>book</strong>: <strong>Principles</strong> <strong>and</strong> <strong>Practices</strong><br />

Figure 13-18. Cracked, burnt,<br />

eroded, <strong>and</strong> corroded first<br />

stage turbine nozzle concave<br />

trailing edge surface. This<br />

4,500 horsepower gas turbine-generator<br />

unit operated<br />

for 17,000 hours with undersized<br />

water injection nozzle<br />

orifices in half the distribution<br />

ring.<br />

Figure 13-19. Burnt <strong>and</strong> eroded trailing edges of first stage turbine<br />

nozzles. 4,500 horsepower gas turbine-generator unit after 44,500<br />

hours operation.

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