Download PTU B.Tech 2020 March Aero 5th Sem ANE 312 Aerodynamics ? Ii Question Paper

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B.Tech.(ANE) (Sem.=5)
AERODYNAMICS - 1I
Subject Code : ANE-312
M.Code : 60521

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INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

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SECTION-A

Q1. Attempt the following :

1. Define Kutta condition.
2. Draw lift curves for symmetrical and cambered airfoil sections.
3. What do you mean by formation flying?

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4. Distinguish between upwash and downwash.
5. Define induced drag.
6. Define Critical Mach number.
7. Define supersonic and subsonic leading edges.
8. Define supercritical airfoils.

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9. What do you mean by HAA aerodynamics?
10. Define Conformal transformations.

SECTION-B

Q2. Explain the complete vortex system.

Q3. Consider a finite wing with an aspect ratio of 8 and a taper ratio of 0.8. The airfoil section is thin and symmetric. Assume that 8 = © = 0.055. Calculate the lift coefficient and induced drag coefficients for this wing at a geometric angle of attack of 5°.

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Q4. Explain Prandtl’s classical lifting line theory.

Q5. Explain the Helmholtz’s theorems of vortex motion.

Q6. Write a note on : ‘Vortex Panel Method’.

SECTION-C

Q7. Consider an NACA airfoil whose mean camber line is given by :

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7/c =2.6595 [(x/c)’ — 0.6075 (x/c)*+ 0.1147 (x/c)] for 0 < (x/c) <£0.2025
z/c =0.02208 [1 — (x/c)] for 0.2025 < (x/c) <1

Calculate :

1. The angle of attack at zero lift
2. The lift coefficient when a'= 6°

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Q8. Write notes on the following :

1. Prandtl - Glauert compressibility correction.
2. Leading edge suction analogy.

Q9. Define Kutta-Juokowaski transformation and use it to transform a circle into a cambered airfoil. Calculate the theoretical lift coefficient of a Zhukovsky airfoil having thickness ratio of 0.2 and camber of 3%, set at 3° incidence in a two dimensional irrotational flow. (2,5,3)

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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