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Abradable Linings:
Abradable Linings are usually made of a composite material which will be abraded away should the tip of a rotating blade touch the material. In flight the casings of an engine are subject to large changes in ambient temperature, so they will expand or contract. As we know the air temperature at 30,000ft is close to -50°C this would cause the casings to contract onto the rotor and the blades will then rub. To overcome this problem abrasive materials where used on early engines to wear down the tip of the blades, but this may cause balance problems. So most engines now use abradable linings that maintain minimum tip clearance but do not affect balance. They are usually found on the fan as this is the cold area of the rotating assemblies.
Heat conduction problem in hollow cylinder There are a lot of researches for calculating the temperature field in various shapes using different boundary and initial cond
With the help of circuit diagram and the waveforms,explain the working of a negative clipper with positive biasing voltage.also explain the Same concept in series clipper circuit
Estimators for control: Applying control by the state itself needs transducers measuring each componentof x. If instead we apply control using the estimate of state (as prov
The atmosphere in the room was tense. Ted Kimoski, Financial Director for Global Mining, had justfinished his presentation. John Campbell, Managing Director, sat quietly making not
process / description.. if I put A=1000 and B=0100 A>B gate will show output 1 and dose A
Compressibility Fluid: Compressible fluid flow refers to the air flow through a gas turbine engine and, because the air is compressible, flow at subsonic speeds causes a change
require help in making pov display
explain processor
Question: a) Assume that you are the director of the Solid Waste Unit of the Ministry of Local Government. Explain how you would undertake a waste audit at the level of a munic
small signal operation in bjt
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