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External cooling
Cooling of the external skin of an aero-engine is achieved by suitable design of the aircraft airframe; the layout will depend upon where the engine is fitted and what kind of engine compartment is used. Normally, the cooling and ventilating of an engine bay or pod is achieved by ducting atmospheric air round the engine and spilling it back to atmosphere through suitably placed outlets (see figure). The air is usually taken from a ram inlet but provision is also made to provide a cooling and ventilating airflow during ground running periods. Another function of the cooling airflow is to remove flammable vapours from the engine compartment to reduce the fire risk.
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Exhaust duct arrangement in Aircraft: Exhaust ducts are invariably positioned to ensure that on the ground as the hot gases are directed away from the maintenance crews and air
The Impact and Post-impact Behaviour of Composites Many early studies involved doing Charpy tests on small notched samples. This is a destructive test of impact resistance, co
Which type of financing is appropriate to each firm?
A 50 cm diameter pipeline in the Arctic Carries hot oil at 30 0 C and exposed to a surrounding temperature of -20 0 C. Special powder insulation 5 cm thick surrounds the pipe an
Firm A needs to purchase a new machine. If the machine is purchased, it will replace an old machine purchased 10 years ago for €105,000 and which is being depreciated on a straight
1) An investment project requires a net investment of $100,000. The project is expected to generate annual net cash flows of $28,000 for the next 5 years. The firm''''''''s cost of
In a CDMA system, the signal is spread over a large bandwidth by multiplying the transmitted symbol by a sequence of short pulses, also called chips. The system bandwidth is thus d
Assembly buildings: Assembly buildings are high life risk premises. People often very densely occupy such buildings and they do so in large numbers so they must be given good
Advantages of hot extrusion
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