A low speed wind tunnel has a contraction ratio of 14:1 and the cross-sectional area of the test
section is 1
m2. The static pressure difference between th e settling chamber and the test section is
40 cm of water column. Assume , and . The
speed of air in the test section (in m/s) is
2m/s 81 . 9g 3kg/m 2 . 1air 3kg/m 1000water
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2011 Q.29)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Structural Mechanics** under *Aerospace Structures* (1 Mark, 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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