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

Calculating the thrust of the engine - engine performance, Calculating the ...

Calculating the thrust of the engine: When applying the above method to calculate the individual thrust loads on the various components it is assumed that the engine is static.

Advantages of cold working over hot working, List the advantages of cold wo...

List the advantages of cold working over hot working?

Diffraction of light, what do you mean by diffraction of light? what is the...

what do you mean by diffraction of light? what is the diffrence between interference and diffraction of light?distinuish between Fresnel''s and Fraunhofer''s diffraction.

Finance, Rajender Kumar was a production worker at competent Motors Limited...

Rajender Kumar was a production worker at competent Motors Limited (CML) which made components and accessories for the automotive industry. He had worked at CML for almost seven ye

Actuators , Actuators  The actuator consists of the control surfaces...

Actuators  The actuator consists of the control surfaces and associated servomechanisms, and is used to change the missile attitude and trajectory or flight path.

Semiconductor, Explain electrons and holes in quantum walls.

Explain electrons and holes in quantum walls.

WAVE ANALYZERS, TELL ME THE WORKING OF BASIC WAVE ANALYZER WITH DIAGRAM

TELL ME THE WORKING OF BASIC WAVE ANALYZER WITH DIAGRAM

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