Two Wire Sensor for Measuring the Velocity of Non-Isothermal Flows

Area of Science:

• Fluid dynamics
• Thermodynamics
• Measurement science

Background:

• Hot-wire anemometry is sensitive to temperature fluctuations, leading to measurement errors.
• High medium temperatures risk damaging anemometry sensors through burnout.
• Accurate flow velocity measurement is crucial in many industrial and research applications.

Purpose of the Study:

• To develop a robust method for measuring flow velocity in non-stationary temperature environments.
• To mitigate errors caused by temperature variations in flow measurements.
• To prevent damage to measurement sensors in high-temperature conditions.

Main Methods:

• Utilizing the cross-correlation technique with signals from two-wire resistance thermometers.
• Developing a theoretical framework for the proposed measurement approach.
• Conducting experimental verification of the method's efficacy.

Main Results:

• The cross-correlation method effectively compensates for temperature variations.
• Accurate flow velocity measurements were achieved even under fluctuating thermal conditions.
• The proposed technique avoids the need for excessive sensor heating, reducing burnout risk.

Conclusions:

• The cross-correlation method offers a reliable solution for flow velocity measurement in dynamic temperature environments.
• This approach enhances the accuracy and durability of anemometry systems.
• The experimental validation confirms the practical applicability of the proposed technique.