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← ScienceWhich 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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