The paper describes a study of the charge transfer of a solidhyphen;gas suspension in turbulent pipe flow. Using hollow glass spheres as the particulate phase, nitrogen and saturated air respectively as the gaseous phase, experiments were performed at flow rates of Reynolds number 5000ndash;16000. Experimental results reveal that along a dielectric pipe there is strong electrification of the suspension, with particle electrification per pipehyphen;diameter displacement of the order of hyphen; 10minus;5Csol;kg, while along a conductor pipe the charge decay of the electrified suspension is of an empirical form (qsol;m)0exp(minus;agr;l1sol;2), wherelis the suspension displacement from the pipe entrance and agr; is a constant. In each case the pipe length was approximately 1 m, and the internal diameter approximately 1 cm. The process of charge transfer through particlehyphen;pipe impact is discussed, and an experimental EGD generator setup is described.
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