Summary:

The experiment delved into the impact of propeller geometry and pitch on performance metrics, highlighting a strong correlation between propeller geometry, advance ratio, and performance. Further analysis is warranted to discern the individual effects of diameter and pitch.

1. Propeller Performance Reports: Here

Abstract:

• - Explored the influence of propeller geometry and pitch on propeller capability.
• - Compared the performance metrics of four propellers of varying geometries and pitches in a 3x3 wind tunnel.
• - Found performance metrics are dependent on propeller geometry and advance ratio.

Introduction:

• - Objective: Measure performance of propeller geometries and evaluate influence of pitch on parameters like power, thrust, efficiency, and torque.
• - Equipment: Wind tunnel, electric motor, control module, strain gage balance, differential pressure transducer, thermocouple, data acquisition chassis.
• - Procedure: Testing two propellers, collecting data at different Reynolds numbers, and analyzing results.

Theory:

• - Equations used to calculate power, efficiency, thrust, and torque of propellers.
• - Variables include propeller RPM, indicated pressure, drag, air velocity, density, propeller diameter, and rotation speed.

Methods and Procedure:

• - Conducted in 3x3 wind tunnel using specified equipment and measurements.
• - Data collected at different indicated pressures and propeller RPM values.
• - Data processing done in MATLAB.

Results and Discussion:

• - Measured thrust consistently exceeded tare thrust.
• - Unexpected trends observed in thrust, efficiency, and torque data.
• - Potential sources of error discussed, including data distortion and variation in propeller dimensions.

Conclusion:

• - Experiment objectives outlined, highlighting unexpected results and limitations. Recommendations made for future experiments to address limitations and improve accuracy.