Measurement of velocity components by 3 holes and 4 holes probes — Lesson 6

This lesson covers the principles and techniques of flow measurements using probes, specifically focusing on the measurement of velocity components. It delves into the use of 4-hole probes, their design, and their application in measuring flow parameters such as static pressure, stagnation pressure, and velocity components. The lesson also explains the process of calculating velocity components using these probes by measuring pressure. It further discusses the concept of pitch and yaw angles, and how they are used in the measurement process. The lesson concludes with a discussion on how to verify the accuracy of these measurements by comparing calculated flow rates with actual flow rates.

Video Highlights

00:44 - Measurement of Velocity Components by Using Probes
07:37 - Measurement of pressure using the 4 hole probe
20:29 - Calculation of the pitch coefficient and the total pressure coefficient
25:00 - Representation of the calibration results in terms of the probe coefficient
42:35 - How to verify the accuracy of measurements

Key Takeaways

- 4-hole probes are used to measure flow parameters such as static pressure, stagnation pressure, and velocity components.
- The measurement process involves calculating velocity components by measuring pressure using these probes.
- The pitch and yaw angles play a crucial role in the measurement process.
- The accuracy of these measurements can be verified by comparing calculated flow rates with actual flow rates.