Bernoulli's Experiment

What is the differences between fan, compressor and blower? Fan Compressor Blower function Moving large amounts of gas with low increase in pressure Moving volume of gas and raising gas from low pressure to high pressure. Moving volumes of a gas which involves in moderately increasing the pressure.

Types of fluids Incompressible fluid Compressible fluid Incompressible fluid

Specific volume constant change constant

Pressure ratio Low High Moderate

What is the Bernoulli theorem? What are the important parameters to be considered in measuring the air flow?

Bernoulli’s theorem is the principle of energy conservation for ideal fluids in steady, or streamline, flow. Bernoulli’s theorem, in fluid dynamics, relation among the pressure, velocity,

Bernoulli 's equation can be used to approximate these parameters in water, air or any fluid that has very low viscosity. The Bernoulli equation states that for an ideal fluid (that is, zero viscosity, constant density and steady flow), the sum of its kinetic, potential and thermal energy must not change. This constraint gives rise to a predictable relationship between the velocity (speed) of the fluid, its pressure, and its elevation (relative height). Specifically, given two points along a streamline (an imaginary line tangent to the direction of flow, as shown in Figure 1), the Bernoulli equation states that:

1/2 ρv_1^2+ρgh_1+P_1=1/2 ρv_2^2+ρgh_2+P_2 where v is fluid velocity, ρ is fluid density, z is relative height, and P is pressure. Describe the working principles of orifice, venturi and pilot static tube in measuring the flow of

It uses the same principle as a venturi nozzle, namely Bernoulli 's principle which says that there is a relationship between the pressure of the fluid and the velocity of the fluid. When the velocity increases, the pressure decreases and vice versa.An orifice plate installed in a line creates a pressure differential as the fluid flows through it. This differential pressure is measured via impulse lines by a differential pressure transmitter which converts it into an analogue or digital signal which can be processed to provide a display of the instantaneous rate of flow. The relationship between the rate of flow and the differential pressure produced is very well understood and is fully covered by comprehensive national standards. The relevant standards are BS 1042 and the equivalent ISO 5167. One of the principle advantages of orifice plates manufactured and installed following these standards is that they do not require calibration.

Venturi For venturi, it is based on the principle of Bernoulli’s equation. Inside of the venturimeter pressure difference is created by reducing the cross-sectional area of the flow passage. The pressure difference is measured by using a differential U-tube manometer. This pressure difference helps in the determination of rate of flow of fluid or discharge through the pipe line. As the inlet area of the venturi is large than at the throat, the velocity at the throat increases