Static aeroelasticity, Other Engineering

Assignment Help:

An object, such as an aerofoil, moving through a fluid disturbs the surrounding flow field. The fluid velocity varies along the aerofoil surface creating a variation in pressure as indicated in Fig. 7. The figure shows the pressure coeficient cp(x) where cp = (p-p)/q with q as dynamic pressure and p as undisturbed pressure far away from the aerofoil. Integrating the pressure coeficient along the object's surface gives the aerodynamic loads of lift, drag and moment.

1857_Static Aeroelasticity.png

Pressure coeficient around aerofoil NACA 4412 at Mach 0.3 and αr = 1.0o.

The centre of pressure is defined as the average location of the pressure where the resulting forces act. This is similar to defining the centre of gravity as the average location of the weight. The aerodynamic moment at the centre of pressure is zero. This point varies with the angle of attack, while for an aerofoil at subsonic speeds it is close to the quarter chord point.

Similarly, the aerodynamic centre is defined as the point along the chord where the aero-dynamic moment is independent of the angle of attack. For an aerofoil at subsonic speeds, the aerodynamic centre is close to the quarter chord point, while at supersonic speeds the points shifts to the mid-chord location.

 


Related Discussions:- Static aeroelasticity

When should stock rather than debt to fund its operations?, When should sto...

When should stock rather than debt to fund its operations? There are several reasons for an organization to problem inventory rather than financial obligations. The first is if

Low pressure turbine clearance control valve - aircraft, Low pressure turbi...

Low pressure turbine clearance control valve: At take-off and low altitude the valve is in its normal closed position allowing cooling airflow to the core compartment. When an

Mine engineering, Students are to undertake a tunnel blast design for the f...

Students are to undertake a tunnel blast design for the following conditions: • Tunnel is 5.5m wide by 5.5.m high • Rock is a sandstone with a UCS of 400 MPa • Drill hole diameter

Invalidation of certificate of airworthiness, INVALIDATION OF CERTIFICATE O...

INVALIDATION OF CERTIFICATE OF AIRWORTHINESS Listed below are the four major reasons why a Certificate of Airworthiness could become invalid. There may be other specific reason

Aviation legislation - certificate of design, Aviation legislation - Certif...

Aviation legislation - Certificate of Design: During the construction, the manufacturer has to provide the C.A.A. with a Certificate of Design and also a Type Record for th

What is tact?, What is Tact? Tact is nothing but a situational score ene...

What is Tact? Tact is nothing but a situational score energy. Once I had gone to a Govt workplace for getting documentation. There I was informed to provide unwanted fee more th

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