Aerospace Laboratory I: Finite Wing Analysis in the Kirsten Wind Tunnel (KWT)

Summary:

The experiment investigates propeller geometry and pitch influence on performance metrics. It compares four propellers in a 3x3 wind tunnel and discusses limitations.

1. Finite Wings Report: Here

Abstract:

• - Explored propeller geometry and pitch influence on performance metrics.
• - Found performance metrics depend on propeller geometry and advance ratio.
• - Highlighted the need for further analysis on propeller design optimization.

Introduction:

• - Objective: Measure propeller performance and evaluate pitch influence.
• - Utilized advanced equipment and a 3’x3’ wind tunnel for controlled airflow.
• - Experiment involved testing two propeller models at different pressure values.

Theory:

• - Propeller power, efficiency, thrust, and torque equations were explored.
• - Discussed propeller advance ratio and its impact on efficiency and thrust.
• - Formulas for thrust and torque coefficients were provided.

Methods and Procedure:

• - Experiment conducted in a 3x3 wind tunnel using various equipment.
• - Data collected included RPM, indicated pressure, drag, torque, and temperature.
• - Propellers tested at different indicated pressures and RPM ranges.

Results and Discussion:

• - Thrust trends deviated from expectations, possibly due to data inaccuracies.
• - Efficiency and torque data showed unexpected patterns, requiring further investigation.
• - Limitations of the experiment, including potentiometer and propeller dimensions, were discussed.

Conclusion:

• - Results were unexpected, possibly due to limitations in experimental setup.
• - Suggested improvements include digital motor speed control and consistent propeller dimensions.
• - Highlighted the need for future experiments to isolate propeller geometry and pitch effects.