Blade twist - aircraft engine, Other Engineering

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

Posted Date: 9/14/2012 2:38:08 AM | Location : United States







Related Discussions:- Blade twist - aircraft engine, Assignment Help, Ask Question on Blade twist - aircraft engine, Get Answer, Expert's Help, Blade twist - aircraft engine Discussions

Write discussion on Blade twist - aircraft engine
Your posts are moderated
Related Questions
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

Balanced Investment Strategy Portfolio management strategy where all assets are owed with the aim of avoiding excessive risk by diversifying investment athwart different asset clas

#question.do you write financial econometrics assignment?.

How to design heat exchanger project from aromatics from shale gas transport phenomena, CHE 306

Capacitive transducers Consider a capacitor consisting of two parallel conducting plates with an insulator in between. Its capictance is C = ε 0 ε r  A/d where ε

Q. Describe the advantages and disadvantages of hot working and cold working processes. Explain the extrusion process. Ans. Advantages of hot working process

compute IDFT using DIT and DFT X(K)={20,-5.828-j2.414,0,-0.172-j0.412,0,-0.172+j0.414,0,-5.828+j2.414}

Process of fire risk assessment: In the UK, the process for  the FRA came out of the process for a general risk assessment. In a general risk assessment hazards are identif

Hi there, I''ve sent an email to you guys about Telecommunication Networks assignment and I haven''t yet received any reply. Pleases let me know if you have received it. Thank yo

why aryton shunt called universal shunt?