GATE 2017-2018 :: GATE Aeronautical Engineering
- A rocket motor has a chamber pressure of 100 bar and chamber temperature of 3000 K. The ambient pressure is 1 bar. Assume that the specific heat at constant pressure is 1 kJ/kg-K. Also assume that the flow in the nozzle is isentropic and optimally expanded. The exit static temperature in K is
- Given that the Laplace transform, L(eat) = 1/(s - a) then L(e5t sinh 5t)
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Values of a, b and c, which render the matrix
orthonormal are, respectively - A glider is launched from a 500m high hilltop. Following data is available for the glider: Zero lift drag coefficient CD0 = 0.02 , aspect ratio AR = 10 and Oswald efficiency factor e = 0.95. The maximum range of the glider in km is _________
- Which one of the following criteria leads to maximum turn rate and minimum radius in a level turn flight?
- Consider an airplane with rectangular straight wing at dihedral angle T = 100 . Lift curve slope of wing airfoil section (constant over the whole span of the wing) is cla = 5.4/rad. The roll stability derivative, Clb in per radian is __________
- Consider one-dimensional isentropic flow at a Mach number of 0.5. If the area of cross-section of a streamtube increases by 3% somewhere along the flow, the corresponding percentage change in density is ________
- The potential flow model for a storm is represented by the superposition of a sink and a vortex. The stream function can be written in the (r, q) system as u= -A/2∠q + T/2∠ln r, where A = T = 100 m2/s. Assume a constant air density of 1.2 kg/m3. The gauge pressure at a distance of 100 m from the storm eye is
- Three identical eagles of wing span s are flying side by side in a straight line with no gap between their wing tips. Assume a single horse shoe vortex model (of equal strength Γ) for each bird. The net downwash experienced by the middle bird is
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Streamline pattern of flow past a cylinder is shown in the figure below. The oncoming flow is steady, irrotational and incompressible. The flow is from left to right. Bernoulli's equation CANNOT be applied between the points
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