Differential Temperature Anemometer

TL;DR

This paper introduces a differential temperature anemometer that leverages the instantaneous imbalance in heating and cooling power to achieve rapid response times in measuring fluctuating flow velocities.

Contribution

It proposes a novel anemometer design that uses temperature gradients for real-time flow measurement, overcoming thermal inertia limitations of traditional thermal anemometers.

Findings

Achieves faster response times than conventional thermal anemometers.

Utilizes temperature imbalance to measure flow fluctuations instantaneously.

Potential for improved accuracy in rapidly changing flow conditions.

Abstract

Common thermal anemometers (hot-wire, hot-film, or similar) are based on the thermal equilibrium between the electrical power heating the sensor and the convection of the ambient medium cooling the sensor. The response times of such instruments are often insufficient in rapidly fluctuating flow processes due to the thermal inertia of their sensing elements. By using the instantaneous imbalance between the heating and the cooling power, which leads to a temperature gradient of the sensor, an instantaneous response of the measurement system can be achieved.