Torsional divergence, Other Engineering

Assignment Help:

 Torsional Divergence

Lets first try to explain and interpret torsional divergence for the aerofoil structural model physically. An additional figure describing the mechanical system to discuss torsional divergence is given In steady flight the aerodynamic forces and moments, acting on the wing and trying to deform it, are balanced by the elastic restoring forces and moments. The wing does not deform from its steady position. A disturbance of the steady flight conditions introduces an additional aerodynamic moment trying to twist the wing which is resisted by the elastic moment.
While the elastic moment is independent of the flight velocity, the aerodynamic moment is not. Basically, the aerodynamic moment linearly increases with the dynamic pressure. An incremental increase in twist may cause an incremental increase of the aerodynamic moment, which in turn incrementally increases the twist. Then, there may exist a critical dynamic pressure (flight velocity), when the elastic stifiness can not resist the aerodynamic moment, and the wing becomes torsionally divergent. 

Lets add some mathematical expressions. The flap deflection is locked and set to zero when discussing torsional divergence. In steady flight there is assumed to be a "rigid" angle of attack αr. The angle from zero lift line is then the sum of αr and an elastic twist αe in the torsion spring due to aerodynamic loading:

                                                  a=ar+ae

 

 


Related Discussions:- Torsional divergence

International finance, What will be the effects of an increase in the money...

What will be the effects of an increase in the money supply on the interest rate? What will be the effects of an increase in real output on the interest rate?

Explain derivatives in terms of capital markets, Explain derivatives in ter...

Explain derivatives in terms of capital markets The term mixture indicates that it has no separate value that is its value is entirely resulting from the of the actual resources

Aircraft maintance, Explain different types of intakes of aircraft

Explain different types of intakes of aircraft

Fuel system inhibiting, Fuel system inhibiting. The fuel used in turbi...

Fuel system inhibiting. The fuel used in turbine engines usually contains a small quantity of water which, if left in the system, could cause corrosion. All the fuel should th

Procedure of producing self lubricated bearings, The self lubricating beari...

The self lubricating bearing is a typical application of metal powder parts or powder metallurgy process. The self lubricating bearings made from brass, iron, aluminium bronze etc,

Why would an investor buy preferred stock?, Why would an investor buy prefe...

Why would an investor buy preferred stock? A buyer that wants the benefit potential of value but wants to reduce possibility would buy recommended inventory. The buyer would rec

Automatic interior car lights control, hi there, i need to know if its poss...

hi there, i need to know if its possible to create a circuit of automatic interior car lights control

Assignment, 1. Indicate one method for alleviating each of the following pr...

1. Indicate one method for alleviating each of the following problems associate incineration of municipal solid wastes (MSW). (a) Odors from the burning organics (b) Particulate

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