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Air flow control system – operation:
The stages of the compressor are matched to give the highest efficiency in the speed range maximum rev/min. To extend the range of smooth operation over lower engine speeds, variable-incidence intake guide vanes and/or an air bleed valve are fitted. In the lower speed range the bleed valve opens to allow some of the air to escape from the rear stages of the compressor, thus restricting the mass air flow through the later stages and preventing an unstable flow pattern.
When the bleed valve is open, the guide vanes if fitted are partially closed; at higher engine speeds, when the bleed valve is closed, the guide vanes if fitted move progressively towards the open position. The vanes are operated by a hydraulic ram which incorporates its own control mechanism and which receives a signal of engine speed in terms of hydraulic pressure from the engine speed governor in the fuel pump.
Convert the following reduced bearings to whole circle bearings: N.36°16’E; (b) S.28° 14’ E. (c) S.47°26’W and (d) N.58°24’W
Means of escape - place of safety: The means of escape in a building are often supplemented by a fire warning system that may or may not include automatic detection, depending
how 3 stage clos networks with an examples
Interior noise is basically airborne or structure-borne. The excitation sources of vibratation and noise from engines can be divided as mechanical, combustion, and flow sources.
A blade cascade is a row of evenly space yp dentical blades. Approximates to a turbomachinery rotor or stator if the radius the annulus is large compared with the bl the annulus is
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
Create resolving questions on comments of couples
Q. There is no end centered tetragonal lattice in the bravis list, but there is an end centered orthorhombic lattice. Explain why this is so? Ans. A tetragonal system is
Working of bootstrap sweep circuit?
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
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