GATE_AE_2027_MOCK_03_Q57
GATE 2027 Aerospace Engineering All-India Master Mock 03 (Flight Dynamics, Controls & Space Trajectories)
MCQ · 2 Marks
Propulsion • Inlets, Combustors & Nozzles • Combustion Chambers & Total Pressure Loss
In a gas turbine annular combustor, primary zone equivalence ratio \phi is typically maintained near stoichiometric (\phi pprox 1.0) primarily to:
(A) Promote stable flame anchoring and high reaction rates
(B) Minimize total thrust output
(C) Prevent any NOx formation
(D) Lower the combustion chamber temperature to turbine levels immediately
Answer Key:
A
Step-by-Step Verified Solution
### Solution: The primary combustion zone operates near stoichiometric conditions to ensure rapid chemical kinetics and robust flame stability; dilution air is added downstream to lower temperatures to turbine inlet limits. Correct: A.