Static aeroelasticity, Other Engineering

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.

 

Posted Date: 8/28/2012 12:51:22 AM | Location : United States







Related Discussions:- Static aeroelasticity, Assignment Help, Ask Question on Static aeroelasticity, Get Answer, Expert's Help, Static aeroelasticity Discussions

Write discussion on Static aeroelasticity
Your posts are moderated
Related Questions
If all states are measured by appropriate sensors and interfaced to the flight control computer then allthe states may be fed back and there is no restriction on the choice of K. S


all about pepsi company symbol PEP 1. What is the name of the company? What is the industry sector? 2. What are the operating risks of the company? 3. What is the financial risk

Noise Suppression in Aircraft Design: It has been seen that the first step towards noise suppression is at the design stage of the rotating and static parts of the engine. The

procedure to assemble the spindle in the cnc mzachine.........

Q.   Explain Bragg's law. A monochromatic X-ray is incident on a crystal. By rotation the crystal, two successive reflections are obtained at angles of 10.0° and 23.0°. the inter p

Expertsmind.com brings you unique solution in physics -          What is light? -            -          Light is an electromagnetic wave that also comes in "photons"

Essentially, the strategy of CFD is to replace the continuous problem domain with a discrete domain using a grid domain with a discrete domain using a grid. In a continuous doma

Q. Describe the various characteristics of metal powders to be considered before their selection for any process. Ans. Metal Powder Characteristics          Both t