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Experiment #01:: To Analyze The Change in Enthalpy of Nozzle Section of Wind Turbine at Different Flow. Apparatus

The document outlines an experiment to analyze the change in enthalpy in the nozzle section of a wind turbine at varying flow rates using an aerodynamic wind tunnel. It describes the theory behind wind tunnels, their types, and applications in various industries, along with a detailed procedure for conducting the experiment and observations made during the process. The results indicate that as the speed of sound increases, the Mach number also increases due to the rise in air speed.

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5 views3 pages

Experiment #01:: To Analyze The Change in Enthalpy of Nozzle Section of Wind Turbine at Different Flow. Apparatus

The document outlines an experiment to analyze the change in enthalpy in the nozzle section of a wind turbine at varying flow rates using an aerodynamic wind tunnel. It describes the theory behind wind tunnels, their types, and applications in various industries, along with a detailed procedure for conducting the experiment and observations made during the process. The results indicate that as the speed of sound increases, the Mach number also increases due to the rise in air speed.

Uploaded by

fbise12345sargodha
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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EXPERIMENT #01:

To analyze the change in enthalpy of nozzle section of wind turbine


at different flow.
➢ Apparatus:
• Aerodynamic Wind Tunnel

➢ Theory:
• Wind tunnels:
A wind tunnel is a device used in aerodynamic research to simulate the movement
of air around an object or model. It consists of a closed tunnel, through which air is
blown using a fan or other means, and an object or model is placed inside the
tunnel.
Types of Wind tunnels:
There are several types of wind tunnels, including:
1. Subsonic wind tunnels: These tunnels operate at speeds at Mach no less
than 1 (M<1).
2. Transonic wind tunnels: These tunnels operate at both subsonic and
supersonic speeds, typically between Mach 0.8 and 1.2.
3. Supersonic wind tunnels: These tunnels operate at speeds at Mach no.
greater than 1(M>1).
4. Hypersonic wind tunnels: These tunnels operate at speeds at Mach no.
greater than 5(M>5).
Applications of wind tunnel in industries:
Wind tunnels have numerous applications in various industries, including:
1. Aerospace industry: Wind tunnels are widely used in the aerospace
industry to test and improve the aerodynamic performance of aircraft,
spacecraft, and missiles.
2. Automotive industry: Wind tunnels are commonly used in the automotive
industry to evaluate the aerodynamic performance of cars, trucks, and other
vehicles.
3. Architectural industry: Wind tunnels are used in the architectural industry
to evaluate the wind loads on buildings and other structures.
➢ Procedure:
• First of all, I Connect the first pitot tube to the entry point and last pitot tube
to the exit point of convergent-divergent nozzle. Water is present as the
working fluid inside the pitot tube.
• Then I Turned on the apparatus.
• An induced fan is present at the exit point of convergent-divergent nozzle.
• I Vary the RPM of fan with the help of knob. As long as the knob varies the
water column present in the pitot tube moves upward.
• Then I Measure the reading of water head in the pitot tube and convert it into
pressure.
• Then I calculate the exit velocity by using Bernoulli Theorem and continuity
equation.
➢ Observation and Calculations:
Sr.# N h1 h2 𝜟𝒉 C1 C2 𝜟𝒉 = (𝑪𝟐𝟐 − 𝑪𝟐𝟏 )
rpm mm mm m/s m/s
1 10000 0 10 10 313 37.62 48276
2 11000 0 11 11 328 39.42 53015
3 12000 0 12 12 342 41.10 57637
Graph:

Speed vs Enthalpy
60000
55000

ENTHALPY
50000
45000
40000
313 328 342
SPEED

➢ Results and Discussion:


• As the speed of sound of sound increases the value of Mach
number increases because the speed of air increases.
• Keep the eye at right position for noting readings.

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