1. MODERN FLUID FLOW MEASURING INSTRUMENT
Prepared by:
Koladiya Milan R ( )
Koladia Alpesh ( )
Kukadia Chirag ( )
Mandavwala Harsh ( )
Veerayatan Droup of Institutions, FOE & FOM, Mandvi

2. Hot wire anemometer
Laser Doppler anemometer
Particle image velocimetry

3. 1 Hot wire anemometer Classification Single sensor probe
Dual sensor probe
Triple sensor probe

4. Advantages:
Good frequency response
Wide velocity range
Output is continuous
Limitations:
Probe blockage
Used for only clean gas
Needs to be recalibrated frequently

5. 2. Laser Doppler anemometer
Measures velocity using laser light
The objects may be microscopic particle in a fluid, solid surface
Velocity of object is obtained by measuring the change in wavelength of the reflected light

6. Advantages and limitations:
Non contact flow measurement technique
Direct way of measuring local velocity
Very high frequency response
Ideal for real time flow measurement

7. 3. Particle image velocimetry
Non intrusive full field optical measuring technique for fluid motion velocity
The fluid of interest is seeded with tracer particle illuminated by a sheet of bright light
The positions of these particles at different times are recorded on a camera
Then, by measuring the particle displacement, the motion of fluid can be measured

8. Applications:
Aerodynamics
Hydrodynamics
Internal combustion engines
Reactive flow
Mixing flow
Spray formation

9. Advantages and limitations
Non intrusive
Negligible distortion of the fluid flow
Avoids the need for intrusive flow measurement probe
Capable of measuring an entire two dimensional cross section