An ideal ramjet is to operate with exhaust gases optimally expanded to ambient
pressure at an altitude where temperature is 220 K. The exhaust speed at the nozzle
exit is 1200 m/s at a temperature of 1100 K.
Given: 𝛾 = 1.4 at 220 K; R = 287 J/(kg-K) for air
𝛾 = 1.33 at 1100 K; R = 287 J/(kg-K) for exhaust gases.
The cruise speed of this ramjet is ________ m/s (rounded off to nearest integer).
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2022 Q.64)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Air-Breathing & Rocket Propulsion** under *Propulsion* (2 Marks, 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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