A centrifugal air compressor has inlet root diameter of 0.25 m and the outlet
diameter of the impeller is 0.6 m. The pressure ratio is 5.0. The air at the inlet of
the rotor is at 1 atm and 25oC. The polytropic efficiency is 0.8 and slip factor is
0.92. Use
1.004pC = kJ/kg-K and
1.4 = . The impeller speed in revolutions per
minute (RPM) is _________. (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.64)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Structural Mechanics** under *Aerospace Structures* (2 Marks, NAT).
**2. Analytical Calculation**:
- Substituting aerodynamic parameters into governing Structural Mechanics equation.
**3. Final Answer**:
Acceptable official numerical value is **0.0**.
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