WHAT IS AERODYNAMICS? (Part-01)

Introduction to AERODYNAMICS

Let's break the term first.  Aero= Air & Dynamics= Study of forces and motion of an object. Hence, Aerodynamics refers to study of forces and motion of a solid body flowing through air and also the behavior of air interacting with the solid body. These solid bodies can be Aircrafts, Automobiles, Trains, Marine vehicles, Buildings and structures etc. 

Aerodynamic Forces

Due to relative motion between air and body as well as for Engine of vehicle, Four main forces arrive on, (1) Drag Force (2) Lift Force (3) Weight (4) Thrust. At first wee need to know about airfoil to realize these forces. 

AIRFOIL: An airfoil or aerofoil is a streamlined body that is capable of generating significantly more Lift than Drag [1]. Mainly airfoil is the cross-section of wings, sails or propeller blade.

                                                                      

                                                               Fig-01:  Displaying  Airfoil in a wing     (Collected Figure)

Drag Force:  Drag force is the resistive force that oppose the motion of the airfoil. It's one of the rectangular components of resultant force of the airfoil. Normally, Drag force should be minimized for better ourput of an aerodynamic body.

Lift Force:  Lift force is the another component of the resultant force of the aerofoil that helps the aerofoil to gain upward motion or support the weight of the airfoil. Lift force is generally perpendicular to the relative airflow/wind. 

Thrust: This force is given by the engine of the aircraft/ vehicle to overcome the drag force and move toward.