25-08-2017, 09:32 PM
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State the assumptions made in deriving Bernoulli’s equation?
Define circulation?
State Kelvin’s circulation theorem?
What is meant by Magnus effect?
What are the effects of roughness over the cylinder?
What is meant by complex potential function?
What are the limitations of lifting line theory?
Define momentum thickness?
Define shape factor? Write down the approximate values for laminar and turbulent boundary layers?
Differentiate between substantial derivative and local derivative?
Consider the velocity field □(→┬V )= -x/(2 t) □(→┬i ) in an incompressible flow whereρ=ρ_o xt. What is the total acceleration of a particle at (1, 1, 1) at time t=10?
State Kutta Joukowski’s theorem?
Briefly explain induced drag?
What do you mean by self similar solutions?
What are the parameters that influence on the transition of a boundary layer from laminar to turbulent?
Distinguish between ideal and real fluids?
State the assumptions in Euler’s equation?
Define stream function?
Sketch the flow pattern around a spinning cylinder when (i) Г=0 (ii) Г=4πRVα
Define wash in and washout?
State Newton’s law of viscosity?
Sketch a typical laminar boundary layer velocity profile and turbulent boundary layer velocity profile over a flat plate to the same non dimensional scale?
What is finite control volume approach?
Explain the non conservative form of energy equation?
Define source and sink?
Express the Kutta condition in strength of the vortex sheet?
Describe Blasius theorem?
What are the results of thin airfoil theory for a symmetrical airfoil?
What is vortex line and vortex sheet?
What are the differences between laminar and turbulent boundary layer?
What is Navier stokes equation?
Define mass flux and express mass flux in terms of uniform flow velocity?
Write down the energy equation for a steady two dimensional incompressible flow
Enumerate the elementary flows of theoretical aerodynamics?
State and explain D’Alembert’s paradox?
Write down the complex potential to describe the flow around a circular cylinder in a flow with circulation?
State the advantages of Karman trefftz aerofoil profile?
Describe briefly the trailing vortex system of wings?
Is boundary layer flow rotational?
Define skin friction drag and explain how it is influenced by the state of boundary layer?
State the importance of Kutta condition?
What do you mean by singular point in conformal transformation?
Define horseshoe vortex?
Define critical Reynolds number?
Write down the equation of continuity in polar coordinates for unsteady compressible flow in two dimensions?
Write down the Navier stokes equation for three dimensional steady flows?
Distinguish between a free vortex and a forced vortex?
Which combination of basic flows will represent a Rankine oval?
Explain conformal transformation?
What is Kutta condition for a lifting airfoil?
State Biot savart law and explain its usefulness in aerodynamics?
What is boundary layer and why is this concept necessary?
Define momentum thickness and displacement thickness in boundary layer flows?
The flow of an incompressible flow is defined by u=2, v=8x. Does a stream function exist?
Does a velocity potential function Φ=2(x2 + 2y - y2) exist. Describe the possible flow of an incompressible flow?
What is meant by complex potential function?
State Helmholtz vortex theorems?
Give a brief account of von Karman Vortex Street?
What is the basic principle involved in the derivation of general momentum equation in fluid mechanics?
State the condition for irrotationality for a flow?
Enumerate the applications of thin airfoil theory?
Define boundary layer thickness?
State 2-D Navier stokes equation?
Define streamlines and stream function?
What is meant by irrotational flow?
What is a doublet? Sketch its streamline pattern?
Consider the circular cylinder kept in a uniform flow of free stream velocity of 100 m/s. The velocity at a given point on the cylinder is 200 m/s. Calculate the pressure coefficient at this point?
What is the physical interpretation of displacement thickness?
Explain steady and unsteady flows?
Define streamline and path line?
How are angular velocity and vorticity related?
State the continuity equation and irrotationality in terms of stream function?
What is the difference between thick airfoil and thin airfoil in terms of application?
What is meant by greens lemma?
What are the applications of conformal mapping?