A novel technique for solid mass loading measurement in dilute gas–solid two‐phase flow by vortex flow meter based on vortex shedding principles

Abstract

Vortex flowmeter has broad applications in industrial single-phase flow problems. There is experimental evidence suggesting that the presence of particles in gas-solid flows may cause a modulation in the turbulence intensity of the carrier phase. Using vortex flowmeter, one may manipulate vortex shedding generated by a bluff body and, therefore, change pressure fluctuation after bluff body and pressure drop between two sides of the vortex shedder. In this research, a vortex flowmeter with a differential pressure sensor was used to experimentally measure solid mass loading in a dilute gas-solid two-phase flow. The results indicated that the average bluff body pressure drop in gas-solid flows is always more than that occurring in gas flows, and the presence of particles can both attenuate and augment vortex shedding frequency. The results also showed that one can obtain the solid mass loading by means of pressure drop signals with a maximum relative error of 5%, which may be advantageous for industrial process measurement.KEYWORDS differential pressure, dilute gas-solid two-phase flow, solid mass loading measurement, vortex flowmeter

An Online Fully-Automatic High Precision Monitoring System of Steam Dryness Based on Spectral Absorption Characteristics

“…However, this method is not suitable for online detection. Thermodynamic method, 5,7,8 the measurement of steam dryness can be realized with parameters such as steam pressure and feed water flow volume, which can realize automatic steam dryness detection. This process depending on too many parameters, affects its precision.…”