GATE_AE_2027_MOCK_04_Q54
GATE 2027 Aerospace Engineering All-India Master Mock 04 (Aerospace Structures, Thin-Walled Beams & Aeroelasticity)
MSQ · 2 Marks
Propulsion • Thermodynamic Cycles of Gas Turbines • Turbojet and Turbofan Performance
Which of the following variables increase the thermal efficiency of an open Brayton cycle gas turbine?
(A) Increasing compressor pressure ratio r_p
(B) Increasing turbine inlet temperature T_3 (for fixed component efficiencies)
(C) Utilizing turbine exhaust recuperation/regeneration
(D) Operating with zero compressor efficiency
Answer Key:
A,B,C
Step-by-Step Verified Solution
### Solution: Thermal efficiency improves with higher overall pressure ratio (A), higher peak cycle temperature T_3 (B), and recuperation of waste heat (C). Zero compressor efficiency means no work is produced. Correct: A, B, C.