Essay On Wind Tunnel

A wind tunnel is a device used in aerodynamic research to observe the effects of moving air past solid objects. A wind tunnel has of a tubular tunnel. It has the object under test mounted. High speed air is made to move around the object by a suitable fan. The test object is attached with proper sensors to measure pressure distribution, aerodynamic forces or other aerodynamic-related characteristics.

During this project we read about Reynolds no. , boundary layer, drag, lift and many types of wind tunnel but due to small budget, limited resources and limited time we stuck to make a traditional wind tunnel which could measure the drag and lift on the object under test.

Our main aim of building this wind tunnel is to show the effect of air around

of motion.

If turbulence force is negligible than the resulting force is called Navier Stokes eq.

And if the flow is assumed to be ideal as in the case of air , and viscous force is negligible than the eq. of motion is called as Euler’s eq. of motion. In Euler’s motion of eq. on;y gravitational force and force due to pressure is considered.

Mathematically it is given as δp/ρ+gdz+vdv=0, where p is pressure, ρ is density, g has its usual meaning of gravitational force and v is velocity in the particular direction.

Bernoulli’s eq. of motion is derived from Euler’s eq. only by integration. On integration we get the Bernoulli’s eq. which is represented as, p/ρg+v^2/2g+z=constant, here z is height. Therefore, Bernoulli’s eq. of motion is defined as,

In an ideal, steady flow of a fluid, the total energy at any random point of the fluid is constant. The total energy consists of kinetic energy, potential energy, and pressure