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Presentation about basic aerodynamic

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  2. 2. What Is the Meaning of Aerodynamics?  Aerodynamics is the study of the force of objects as they move through air.  Aerodynamics affects both large and small objects.  Lift, drag, weight and thrust are all factors that affect the ability of an object to move through the air and the speed at which it moves.
  3. 3. Motion Law of Sir Issac Newton  Sir Issac Newton's laws of motion are used extensively in aerodynamics.  The first law posits that if force is applied to an object, it moves.  Newton's second law proves that if force is externally applied, an object's velocity will change, and change in velocity generates force.  The third law of motion states that for every action there is an equal and opposite reaction.  These laws are basic to engineering formulas for calculating, for example, how much thrust is needed from a jet engine to create the force necessary for a jet to move.
  4. 4. Lift Forces  Lift is a crucial concept for air travel. Without lift, a plane can't get off the ground.  According to NASA, lift is the force that keeps an airplane in the air and is generally generated by the wings.  It has its foundations in Newton's second law of motion force is produced when mass is accelerated.  When mass is accelerated, it changes velocity, which produces a force.  The flaps on the wings move to exert that force in a different way, which enables the plane to change direction.
  5. 5. Thrust Forces  Thrust is crucial to an airplane's propulsion system, which is what generates the force necessary to keep the plane aloft and moving forward.  The type of plane determines the type of engine used on it.  Fighter jets, for example, need to accelerate quickly. Their high speeds produce a lot of drag, and their engines require considerable force to overcome that.  Passenger planes, on the other hand, cruise most of the time and don't need as much power.
  6. 6. Drag Forces  Drag is the force that prevents an airplane from moving through air.  Thrust overcomes drag, enabling the aircraft to move.  Drag is generated by contact of an object with a fluid, such as air.  For example, drag is what prevents you from moving forward quickly if you are walking directly into the wind. You have to exert more force to overcome it. If the wind is at your back, its force pushes you along.