Gas Turbine Health State Determination: Methodology Approach and Field Application

Figure 6

Normalized values of HIs in case of (a) three problem variables (𝜂_C, 𝜇_C, and 𝜂_GGT), and (b) five problem variables (𝜂_C, 𝜇_C, 𝜂_GGT, 𝜇_GGT, 𝜂_PT, and 𝜇_PT) (multiple operating point analysis).

(a)

(b)