It is desired to estimate the aerodynamic drag, D, on a car traveling at a speed of
30 m/s. A one-third scale model of the car is tested in a wind -tunnel following the
principles of dynamic similarity. The drag on the scaled model is measured to be
Dm. The ratio D/Dm is _________ (rounded off to 1 decimal place).
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2024 Q.65)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Incompressible & Compressible Aerodynamics** under *Aerodynamics & Fluid Mechanics* (2 Marks, NAT).
**2. Analytical Calculation**:
- Substituting aerodynamic parameters into governing Incompressible & Compressible Aerodynamics equation.
**3. Final Answer**:
Acceptable official numerical value is **0.0**.
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