The dynamics of pre-breakdown cavities in viscous silicone fluids in negative point-plane gaps

Observation of partial discharge in hexane under high magnification

“…These observations are further supported by electro-optic measurements in nitrobenzene that show charge injection prior to streamer initiation [22,23]. We believe the present experimental work lends support to the results reported by Watson and Chadband [7] and suggest that electrostatic forces acting on the liquid are of primary importance in driving the growth of the cavity from its inception.…”

“…(See, for example, Yamashita et al [6] for a discussion of these effects.) A plausible description for this initial stage of growth has been presented by Watson and Chadband [7], who show it to be consistent with the propagation of a cavity within the liquid. Similar results are reported for partial discharges (PD): photographic and optical studies [1,8,9] have established a clear correspondence between the growth of a cavity in the liquid and discrete current pulses emitted from the cathode.…”

Observation of partial discharge in hexane under high magnification

“…These observations are further supported by electro-optic measurements in nitrobenzene that show charge injection prior to streamer initiation [22,23]. We believe the present experimental work lends support to the results reported by Watson and Chadband [7] and suggest that electrostatic forces acting on the liquid are of primary importance in driving the growth of the cavity from its inception.…”

“…(See, for example, Yamashita et al [6] for a discussion of these effects.) A plausible description for this initial stage of growth has been presented by Watson and Chadband [7], who show it to be consistent with the propagation of a cavity within the liquid. Similar results are reported for partial discharges (PD): photographic and optical studies [1,8,9] have established a clear correspondence between the growth of a cavity in the liquid and discrete current pulses emitted from the cathode.…”

Research for Electric Energy Systems

“…that the onset for charge injection precedes that however, suggests that the forces acting on the liquid are highly directional, and thus that the gas dynamic pressure within the cavity is of limited importance. We believe these observations lend support to the results reported by Watson and Chadband [81] I and further suggest that, from its inception, the growth of the cavity may be described by the electrostatic forces acting on the liquid. B…”

Research for electric energy systems - an annual report

“…The form of the cavity, however, suggests that the forces acting on the liquid are highly directional, and thus that the gas dynamic pressure within the cavity is of limited importance. We believe these observations lend support to the results reported by Watson and Chadband [81] and further suggest that, from its inception, the growth of the cavity may be described by the electrostatic forces acting on the liquid.…”

“…The mechanisms responsible for the initial growth of negative streamers appear to be distinct from those during its latter stages. Watson and Chadband [81] show initial growth of negative streamers to be consistent with the propagation of a cavity within the liquid. Similar results are reported for partial discharges (PD's), where photographic and optical studies [78,82,83] have established a clear correspondence between the growth of a cavity in the fiquid and bursts of discrete current pulses emitted from a cathode.…”

Observation of partial discharge in hexane under high magnification

“…These observations are further supported by electro-optic measurements in nitrobenzene that show charge injection prior to streamer initiation [22,23]. We believe the present experimental work lends support to the results reported by Watson and Chadband [7] and suggest that electrostatic forces acting on the liquid are of primary importance in driving the growth of the cavity from its inception.…”

“…(See, for example, Yamashita et al [6] for a discussion of these effects.) A plausible description for this initial stage of growth has been presented by Watson and Chadband [7], who show it to be consistent with the propagation of a cavity within the liquid. Similar results are reported for partial discharges (PD): photographic and optical studies [1,8,9] have established a clear correspondence between the growth of a cavity in the liquid and discrete current pulses emitted from the cathode.…”

Research for Electric Energy Systems

“…that the onset for charge injection precedes that however, suggests that the forces acting on the liquid are highly directional, and thus that the gas dynamic pressure within the cavity is of limited importance. We believe these observations lend support to the results reported by Watson and Chadband [81] I and further suggest that, from its inception, the growth of the cavity may be described by the electrostatic forces acting on the liquid. B…”

Research for electric energy systems - an annual report

“…The form of the cavity, however, suggests that the forces acting on the liquid are highly directional, and thus that the gas dynamic pressure within the cavity is of limited importance. We believe these observations lend support to the results reported by Watson and Chadband [81] and further suggest that, from its inception, the growth of the cavity may be described by the electrostatic forces acting on the liquid.…”

“…The mechanisms responsible for the initial growth of negative streamers appear to be distinct from those during its latter stages. Watson and Chadband [81] show initial growth of negative streamers to be consistent with the propagation of a cavity within the liquid. Similar results are reported for partial discharges (PD's), where photographic and optical studies [78,82,83] have established a clear correspondence between the growth of a cavity in the fiquid and bursts of discrete current pulses emitted from a cathode.…”

Observation of partial discharge in hexane under high magnification

“…These observations are further supported by electro-optic measurements in nitrobenzene that show charge injection prior to streamer initiation [22,23]. We believe the present experimental work lends support to the results reported by Watson and Chadband [7] and suggest that electrostatic forces acting on the liquid are of primary importance in driving the growth of the cavity from its inception.…”

“…(See, for example, Yamashita et al [6] for a discussion of these effects.) A plausible description for this initial stage of growth has been presented by Watson and Chadband [7], who show it to be consistent with the propagation of a cavity within the liquid. Similar results are reported for partial discharges (PD): photographic and optical studies [1,8,9] have established a clear correspondence between the growth of a cavity in the liquid and discrete current pulses emitted from the cathode.…”

Research for Electric Energy Systems

“…that the onset for charge injection precedes that however, suggests that the forces acting on the liquid are highly directional, and thus that the gas dynamic pressure within the cavity is of limited importance. We believe these observations lend support to the results reported by Watson and Chadband [81] I and further suggest that, from its inception, the growth of the cavity may be described by the electrostatic forces acting on the liquid. B…”

Research for electric energy systems - an annual report

“…The form of the cavity, however, suggests that the forces acting on the liquid are highly directional, and thus that the gas dynamic pressure within the cavity is of limited importance. We believe these observations lend support to the results reported by Watson and Chadband [81] and further suggest that, from its inception, the growth of the cavity may be described by the electrostatic forces acting on the liquid.…”

“…The mechanisms responsible for the initial growth of negative streamers appear to be distinct from those during its latter stages. Watson and Chadband [81] show initial growth of negative streamers to be consistent with the propagation of a cavity within the liquid. Similar results are reported for partial discharges (PD's), where photographic and optical studies [78,82,83] have established a clear correspondence between the growth of a cavity in the fiquid and bursts of discrete current pulses emitted from a cathode.…”