Numerical simulation of wind field error of ultrasonic wind speed sensor

Abstract

In order to study the influence of the wind field error on the measurement results of the mine ultrasonic time difference wind speed sensor, the computational fluid dynamics method was used to analyze the flow field and acoustic channel velocity distribution of sensors with different structure types under different wind directions and wind speeds. The research results indicate that the measured wind speed of the opposite-type structure is significantly affected by the wind direction angle than the reflection-type structure. The corrected relative error of the opposite-type structure at a 45 ° wind direction angle is the smallest and better than the reflection-type structure. Among three reflection-type structures, the concave transducers has the smallest impact on wind speed measurement, followed by raised transducers, and semi-raised transducers has the greatest impact. The measurement of concave transducers is least affected by the wind direction angle, while the raised and semi-raised transducers have similar effects. Among the three installation methods, the semi-raised installation has better flow field consistency at different flow velocity, and the corrected measurement error is the smallest. Choosing an appropriate structural layout for ultrasonic wind speed sensors can improve measurement accuracy.

Keywords

• mine wind speed sensor
• wind speed measurement
• ultrasonic time difference method
• numerical simulation
• wind measurement error