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

Assignment help, need help with energy engineering assignment,environment t...

need help with energy engineering assignment,environment technology assignment,mechanical assignment

Robotics, how to become robotics engneer

how to become robotics engneer

C programming fork() dub2(), develop a C program for Linux called pipes.c t...

develop a C program for Linux called pipes.c that does the following: In the main() function, it creates a pipe using the pipe() function, then creates two child processes with for

Cash Conversion Cycle, The need for working capital to run the day-to-day b...

The need for working capital to run the day-to-day business activities cannot be overemphasized. We will hardly find a business firm which does not require any amount of working ca

Subtraction of two 16-bit numbers, write a programme of subtraction of two ...

write a programme of subtraction of two 16 bit numbers

Water haedness, hardness of bore well water is less than sea water

hardness of bore well water is less than sea water

thermodynamics, Steam enters in the turbine at 6 MPa and 450 deg C and exp...

Steam enters in the turbine at 6 MPa and 450 deg C and expands at some intermediate pressure 60 % of steam is extracted and remainder expands to 10 kPa at this Investigate the effe

Payback period method, Non-discounted cash flow method, Payback period met...

Non-discounted cash flow method, Payback period method In this method, time value of money is not considered. It takes into account the number of years required to recover the in

Company Acquisition and Takeover vs acquisition , Company Acquisition, Take...

Company Acquisition, Takeover vs acquisition and holding copany A fundamental characteristic of merger (either through absorption or consolidation) is that the acquiring or amalg

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