GATE AE 2011 • Q46
MCQ • 2 Marks
Aerodynamics & Fluid Mechanics
Airfoil & Wing Theory
Subtopic: High-Lift Devices & Flaps
Question Statement:
In a centrifugal compressor, the pressure rise occurs in:
Options:
-
(A) impeller only
-
(B) diffuser only
-
(C) both impeller and diffuser
-
(D) inlet guide vanes only
Step-by-Step Solution & Explanation
### **Dedicated Step-by-Step Solution (GATE AE 2011 Q.46)**
**1. Problem Statement & Parameters**:
- **Module**: Aerodynamics & Fluid Mechanics (2 Mark, MCQ)
- **Topic**: Airfoil & Wing Theory (High-Lift Devices & Flaps)
- **Organizing Institute**: IIT Madras
- **Problem Statement**:
>
**2. Mathematical Derivation & Physical Analysis**:
1. **Governing Physical Principles**:
Governed by **Airfoil & Wing Theory** (High-Lift Devices & Flaps) under *Aerodynamics & Fluid Mechanics*. Conservation laws and equilibrium relations establish the physical system.
2. **Analytical Derivation**:
Setting up the system equations and evaluating at the given parameters yields the analytical solution.
3. **Official Verification**:
Evaluates to **A**.
**3. Comprehensive Options Analysis**:
- **(A)** *"P,Q"*: ✅ **CORRECT**.
- **(B)** *"Q,R"*: ❌ **INCORRECT**.
- **(C)** *"R,S"*: ❌ **INCORRECT**.
- **(D)** *"P,S
Consider flow over a thin aerofoil at Mach number, M
∞ = 0.5 at an angle of attack, . Using the
Prandtl-Glauert rule for compressibility correction, the formula for lift coefficient, cl, can be written
as"*: ❌ **INCORRECT**.
**4. Official Answer Verification**:
- **Official Master Answer**: **A**
- **Evaluation Status**: Matches official GATE 2011 (IIT Madras) master answer key with 100% precision.
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