Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2023 - September 06, 2023
Hydrogen is expected to leak in a variety of situations, from production to consumption. In order to realize a hydrogen sensing system that is more flexible and quicker than conventional systems, we have proposed a new drone-based system for hydrogen sensing with a small thermal conductivity type hydrogen sensor. Initially, quad-rotor drones were thought to be unsuitable for hydrogen leak detection because hydrogen is pushed away from the drone by propeller downwash. However, recent CFD (Computational Fluid Dynamics) analysis and smoke experiments have shown that hydrogen leak detection is possible even under the propeller downwash. It became clear that the actual hydrogen was also pushed down by the descending airflow once, and then passed outside on the circulating airflow to reach the drone. In order to study the path of hydrogen transport around the drone, we propose a simple model of a stochastic partial differential equation on the basis of potential flows and random disturbance.
