Airflow control system principles-aircraft engine, Other Engineering

Assignment Help:

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.

710_airflow control system principles.png

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


Related Discussions:- Airflow control system principles-aircraft engine

[email protected], First page rankings on Google We can put...

First page rankings on Google We can put your website on 1st page of Google to drive relevant traffic to your site. Let us know if you would be interested in getting detailed prop

Low pressure turbine clearance control valve - aircraft, Low pressure turbi...

Low pressure turbine clearance control valve: At take-off and low altitude the valve is in its normal closed position allowing cooling airflow to the core compartment. When an

Sprinkler system - fire protection engineering, Sprinkler system - fire pro...

Sprinkler system - fire protection engineering Sprinkler systems may be installed in a building to achieve a number of different objectives.  Very often the primary reason for

Control surface effectiveness and reversal, Control Surface Effectiveness a...

Control Surface Effectiveness and Reversal To discuss the effectiveness and loss of a control surface, we allow a rigid rotation δ of the flap set by a flight control system (o

Banking and finance, identify the role of the regulators and problems assoc...

identify the role of the regulators and problems associated with regulation

Budget and determining, In Corporate finance, Experts engaged in this occup...

In Corporate finance, Experts engaged in this occupation have the liability to increase the organization's revenue, shareholder's money, investment spending budget and determining

Engineering physics(find wavelenth of light), Interference fringes are prod...

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

Heisenberg''s uncertainty principle , According to this it is impossible to...

According to this it is impossible to specify precisely and simultaneously two physical quantities those are canonically conjugate to each other and the product of the uncertainty

Dischage rate, stuck on a project that requires 5 outputs with 6 inputs and...

stuck on a project that requires 5 outputs with 6 inputs and all formulas

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd