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Passive clearance control system :
Compressor discharge air and HP compressor air provide cooling airflow to protect the turbine casing against rapid temperature changes. The stationary parts in the high-pressure turbine section expand and contract more rapidly than the rotor due to pressure and temperature changes. The rotor also has a radial expansion due to rotational speed.
The turbine casing incorporates temperature controlled casing flanges with cooling air passages for the passive case clearance control system. The cooling air controls the expansion and contraction of the case to match the rotor and thus maintain desired clearances throughout all temperature ranges and operating conditions.
Figure shows (highlighted) air tubes (Bird Cage) that cools the HP and LP turbines. The air is taken from just aft of the fan and ducted through the cowls (not shown).
Control Surfaces As with a flight control system, a guidance algorithm uses control surfaces to control the behaviour of an airframe. - Rudder, ailerons, elev
Integrated circuits: Integrated circuits, or IC's, have changed the entire electronics industry. Before IC's were developed, all electronic circuits consisted of individual (d
Q. What kind of defects are likely to result in castings due to the following? (i) Core prints on the core are undersigned. (ii) Core prints on the core
definition of net income approach
How base case NPV analysis is applied in financial risk management
Extended input facilities Another instance where multiple inputs to a single gate operation can occur is with certain types of gate elements that have an 'EXTENDED INPUT' facil
a note on tracing a closed loop. What are the characteristic features of a closed loop?(
Explain the meaning of numbering and addressing in ISDN network.
x(n)={1, 2+j,j,0,2-j,0,1,-3}
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