GATE_AE_2027_MOCK_01_Q27 GATE 2027 Aerospace Engineering All-India Master Mock 01 (Foundation & Standard Core Calibration) NAT · 1 Mark
Propulsion • Thermodynamic Cycles of Gas Turbines • Thrust Equations & Specific Fuel Consumption

A turbojet engine ingests air at mass flow rate $\dot{m}_a = 40\text{ kg/s}$ at flight speed $V_0 = 200\text{ m/s}$. The exhaust jet velocity is $V_j = 600\text{ m/s}$. Neglecting fuel mass flow and pressure thrust, what is the net thrust $F_N$ produced in kilonewtons (kN)?

Answer Key:
16

Step-by-Step Verified Solution

### Solution: Net momentum thrust: $F_N = \dot{m}(V_j - V_0) = 40 \times (600 - 200) = 40 \times 400 = 16000\text{ N} = 16\text{ kN}$. Correct: 16.
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