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

Finance, et C(K) denote a European vanilla Call option with strike price K....

et C(K) denote a European vanilla Call option with strike price K. Assume that all options are identical except for strike price, and strike prices satisfy (K1) What are the no-a

Qualitative risk assessment - fire protection engineering, Qualitative risk...

Qualitative risk assessment - fire protection engineering: NFPA 551 discusses the differences between qualitative risk assessment and quantitative risk assessment. Qualitat

Ticket EM134795S38_1, Do you receive my payment $480 for the Ticket EM13479...

Do you receive my payment $480 for the Ticket EM134795S38_1 today Feb 20/2017? Please inform me to know. My Email is: Thank you

Petroleum Engineering project, I need help About the project I sent and it ...

I need help About the project I sent and it is the third time I am sending so please I really want help

Composite materials - approximate stability equatation, Most vehicles have ...

Most vehicles have the XZ plane as a plane of symmetry which results in D = 0 and F = 0. Further if the disturbance velociies are small then terms proportional to the square and pr

Difference between fin and swell, Difference Between Fin and Swell    ...

Difference Between Fin and Swell          Swell : The unintentional bulges found on the casting surfaces are known as swells. Such enlargements on the casting surface are cau

Basic characteristics of fire safety management, Basic characteristics of f...

Basic characteristics of fire safety management: basic characteristics - sensibility, reactivity, mobility, and susceptibility - comprise a minimum, exhaustive set of mutually

Cascaded, circit diagram and operation

circit diagram and operation

Events and its efffeccts, i need to prepare my aasingment for financial dat...

i need to prepare my aasingment for financial data analysis for that i need 10 business events

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