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Which outcome increases in gas turbine efficiency when pre-combustion air is heated above the threshold for radical initiation during homogenous autoignition?

A)Reduced overall fuel consumption rate
B)Enhanced formation of unwanted NOx
C)Decreased turbine blade fatigue rate
D)Increased compressor stall margin present

💡 Explanation

Enhanced formation of NOx occurs because *thermal NOx formation* exponentially rises with temperature; therefore heated air increases NOx rather than decreasing fuel use; this effect emerges because nitrogen dissociation constants increase at operating conditions.

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