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Table 4.6 shows the minimum-loss deviation angles for Rotor 35. Table 4.6 Rotor 35 Evaluation of Minimum-Loss Deviation Angle Prediction % Experimental Speed (deg) 100 3.8 90 3.3 70 3.6 Hearsey Carter f(B2′) Modified by (deg) (deg) Cetin (deg) Carter f(stagger) (deg) Modified by Cetin (deg) 0.74 4.20 8.07 3.26 6.63 0.81 4.20 8.07 3.26 6.63 0.80 4.20 8.07 3.26 6.63 Mean Error 2.78 0.63 4.50 0.31 3.06 The Carter models, one a function of blade metal angle and the other a function of blade stagger angle, displayed the least error when compared to the experimental results, with only 0.31° and 0.63° error in minimum-loss deviation angle predictions. When the Carter models were modified by Cetin, they predicted deviation angles that were far above experimental results. Conversely, the Hearsey model severely under-predicted the minimum-loss deviation angles. The same methodology used to evaluate minimum-loss correlations for Rotor 1-B was used to evaluate minimum-loss correlations for Rotor 35. As Rotor 35 did not have a mid-span damper, the damper loss correlations were unnecessary. Therefore, the total predicted loss for Rotor 35 consisted of the sum of the blade profile and shock losses. 49PDF Image | Gas Turbine Design Axial Flow Compressors
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