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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.
Compressor characteristics: When a compressor is designed it is essential to establish the points at which it is likely to surge. Tests are carried out to determine the relati
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To achieve successful results in powder metallurgy the metallic powder must be thoroughly homogenized. The term blending and mixing are both used in this content. Blending refers t
Cash dividend Companies mostly pay dividends in cash. A company should have enough cash in its bank account when cash dividends are declared. If it does most have enough bank bal
Thrust augmentation: There are occasions when the maximum thrust from a basic gas turbine engine is inadequate and some method of increasing the available thrust is required wi
A project has a first cost of $2000. There is another cost at the end of year 1 of $500 and the income for year 3 until 6 year is $1000 per year. If the compounding is quarterly, c
Interference fringes are produced by fresnel''s biprism in the focal plane of an eyepiece 200 cm away from the slit.Two images of the slit that formed each of the two positions of
draw diagonal scale of rf 1/500 and show 57.5m on it
Circuit that is able to convert an AC voltage signal into DC voltage signal
The closed form solutions for ?max and Mmax are given on page 16.1-276 for several axial loads. Figure C-C2.2 summarizes the results for the first benchmark problem and Figure C-C2
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