Blade twist - aircraft engine, Other Engineering

Assignment Help:

BLADE TWIST:

Rotational velocity and its effect on the Angle of Attack depends on the radius of the blade element in question. A blade element near the blade root (hub) will have a much lower rotational velocity than a blade element near the blade tip. Rotational velocity is usually expressed as NR where R is the position of the element from hub centre and N is the propeller R.P.M.

It will be seen that in order to maintain an efficient angle of attack along the length of the blade, a reducing blade angle is necessary from root to tip. This progressive change in blade angle is called blade twist. It is best understood by considering the requirement for each section of the blade to produce an equal amount of thrust and to advance the same distance in one revolution. Ensuring that the angle of attack remains constant along the total length of the blade is a major factor in achieving this.

For a single revolution of the propeller, the amount of air handled depends on the bit of air a propeller takes. Therefore the blade angle is a means of adjusting the load on the propeller to control the engine R.P.M.

1560_blade twist.png


Related Discussions:- Blade twist - aircraft engine

#title.project, what type of projects are take place in the chemical engin...

what type of projects are take place in the chemical engineering

Propeller balance, PROPELLER BALANCE There are two types of balance of ...

PROPELLER BALANCE There are two types of balance of importance when working with propellers: • Static Balance • Dynamic Balance Static balance is checked and corrected

Physical significance of wave function , Wave function is a complex quantit...

Wave function is a complex quantity, which itself has no physical significance. But square of its magnitude gives the probability of finding a particle in a given volume of space a

Assembly buildings - common fault, Assembly buildings - fire risk assessmen...

Assembly buildings - fire risk assessment: Common faults found in assembly buildings are: Combustible items left in protected routes or bedroom corridors Locked exi

Quality assurance and accreditation, how can i link quality assurance and a...

how can i link quality assurance and accreditation with a valid applicaion of my own work?

Compton''s effect, When a beam of monochromatic x ray is incident on a grap...

When a beam of monochromatic x ray is incident on a graphite block, it get scattered and scattered wavelength is larger than that of the incident radiation wavelength. This scatter

Propeller pitch control, Propeller pitch control: Before looking at pro...

Propeller pitch control: Before looking at propeller pitch control an understanding of the relationship between the 'Power Lever' and the 'RPM (condition / speed) Lever' with r

Aeroengine - degree of reaction, Degree of reaction measures the way compre...

Degree of reaction measures the way compression or expansion (for turbines) is shared between rotor and stator shared between rotor and stator of a stage (stage ≡ rotor + stator)

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