The large-scale high-pressure combustor ... possible to use optical measurement technology to record the processes and interactions in all zones and areas of the combustion chamber without influencing ...

Measuring air flow in an HVAC duct can be a tricky business. Paddle wheel and turbine flow meters introduce not only resistance but maintenance issue due to accumulated dust and debris.

which previously delved into ultrasonic flow measurement, led him to try mechanical means. That calls for some kind of turbine producing a signal proportional to air flow, but a first attempt at ...