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Pulsing amplitude measurement in air pulsed disc and doughnut column: Experimental and numerical study
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DOI：10.1016/j.pnucene.2026.106402.png)
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Abstract
En 中文
We report a numerical model to predict pulse amplitude in a 76 mm diameter air pulsed disc and doughnut column (PDDC). The model is validated with experimentally measured values of pulse amplitude under no net flow (both aqueous and organic filled), and two-phase counter-current flow conditions. An ultrasonic sensor (air coupled) mounted in top-disengagement section is used to measure the pulse amplitude experimentally. Absolute average relative error in prediction of pulse amplitude is 3.89, 5.53 and 8.54% for static pulsing with aqueous phase, static pulsing with organic phase and for two-phase counter current flow. A discharge coefficient of 0.65 holds for all experimental conditions for disc-doughnut internal. The aqueous (continuous) and organic (dispersed) phases used are 1 M HNO3 and 1.2 M dihydroxyl octylamide (DHOA) in dodecane respectively. The validated numerical model is used to quantify the influence of different operating variables namely pulse frequency, duty cycle, reservoir pressure and dispersed phase holdup on predicted pulse amplitude. Of all parameters, pulse frequency is seen to have the most significant influence on pulse amplitude. The paper also highlights scale-up aspects of PDDC. Critical information on air consumption and reservoir size necessary for larger diameter PDDC to maintain a desired pulse amplitude can be predicted from the numerical model.
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