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Airflow control system principles:
For any given engine there is only one set of conditions, mass flow, pressure ratio and rpm, at which all the compressor components are operating at their optimum effect. Compressors are designed to be most efficient in the higher rpm range of operation. The point at which the compressor reaches its maximum efficiency is known as the DESIGN POINT. Under design conditions the compressor produces a given compression ratio (ie.Volume 2/Volume 1) and the axial velocity (average velocity) of the gas remains approximately constant from the front to the rear of the compressor.
The Angle of Attack of the airflow to the compressor aerofoil blades will be at its optimum. This is the design condition and the compressor is operating at its optimum performance. Although compression ratio varies with rpm it is not proportional to rpm. This fact emerges due to the fixed blade angles, which can only be correct at the design point. To illustrate this fact, refer to the diagram showing rpm and compression ratio. Consider a compressor running at 8,000 rpm and its compression ratio is 10:1. Let us say that the volume of air entering the compressor is 100cm3. The volume of the air passing through the fixed outlet annulus of the compressor will be 10cm3.
Compressor R.P.M = 8,000 Compressor R.P.M. = 4,000 Compression Ratio = 10:1 Compression Ration = 4:1 Volume of gas (V1) = 100cm3 Volume of gas (V1) = 50cm3 Volume of gas (V2) = 10cm3 Volume of gas (V2) = 12.5cm3
Fractional distillation This process is carried out in a fractionating column, which has a series of trays as shown in the figure. The effect of the superheated steam on the h
It consists o a source of x ray, with a number of collimated slits. Crystal under investigation is mounted on a table, and the position of this table can be recorded on vernier sca
how to develop an algorithm that will accept the names of sales staff members and the total sales for the month.the algorithm must calculate the commission of 3% of the total sales
The following is the capital structure of X Ltd. as on 31st Dec 2003 Rs in m
I am a chemical engineering foundation year. I need your help with my homework, its 3D sketch by using Google sketchup program?? I have not use it before. Or any other 3D sketch p
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Nozzle Guide Vane Inspection: Inspection of the NGVs is possible using a strong light source and mirror, it is more probable however that a boroscope inspection will be require
State Vectors In engineering - particularly control engineering - most systems are represented by a state vector. - The state vector contains all of the relevant qua
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