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An investigation of the generation of Acoustic Emission from the flow of particulate solids in pipelines

Being able to monitor and control the pulverised fuel flow will result in higher combustion efficiency and lower pollutant emissions. There is no non-intrusive instrument that can achieve this due to the level of dilution. Consequently, this paper investigated the feasibility of detecting high frequency “stress waves”, generated as a result of particle impingement on inner pipe surface, as a mean of quantifying solid mass flow rates. This method offers several advantages; that it is non-intrusive and less susceptible to air-born noise.