【Abstract】 The characteristics of pressure fluctuation in a sub me rged circulative impinging stream reactor (SCISR) were experimentally studied.Th e instantaneous signals of pressure fluctuation resulting from the turbulence in the SCISR were measured by sensors and recorded by a computer.The pressure sign als at some special positions were sampled at different rotary speeds of propell er.After analyzing the signals with the Power Spectrum method,it was found that there was an inherent frequency in the dynamic pressure signals.The inherent fr equencies of the point on the impinging plane were greater than 1000 Hz,so the pressure fluctuation was called high-frequency fluctuation.The fluctuation velo cities with high inherent frequency resulted in a strong shear force field,whic h enabled the fluid to mix quickly on the micro-scale and the agglomerates of s olid particles to disperse effectively.更多还原