A supersonic vehicle powered by a ramjet engine is cruising at a speed of
1000 m/s. The ramjet engine burns hydrogen in a subsonic combustor to produce
thrust. The heat of combustion for hydrogen is 120 MJ/kg. The overall efficiency
of the engine
o , defined as the ratio of propulsive power to the total heat release
in the combustor, is 40%. Taking acceleration due to gravity
0 10g = m/s2, the
specific impulse of the engine is _____________ seconds.
(round off to the nearest integer).
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2023 Q.35)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Air-Breathing & Rocket Propulsion** under *Propulsion* (1 Mark, NAT).
**2. Analytical Calculation**:
- Substituting aerodynamic parameters into governing Air-Breathing & Rocket Propulsion equation.
**3. Final Answer**:
Acceptable official numerical value is **0.0**.
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