GATE_AE_2027_MOCK_02_Q28
GATE 2027 Aerospace Engineering All-India Master Mock 02 (Compressible Aerodynamics & High-Speed Propulsion)
MCQ · 1 Mark
Propulsion • Inlets, Combustors & Nozzles • Subsonic & Supersonic Inlets
In an internal-compression supersonic inlet operating below its design Mach number, starting the inlet without unstart typically requires:
(A) Variable geometry (expanding the throat area)
(B) Decreasing combustor backpressure to zero
(C) Increasing fuel flow rate instantly
(D) Closing the subsonic diffuser exit completely
Answer Key:
A
Step-by-Step Verified Solution
### Solution: Kantrowitz limit dictates that swallowing a normal shock to establish started supersonic internal flow requires opening (enlarging) the throat area temporarily during acceleration. Correct: A.