Streamer Mechanism and Main Stroke in the Filamentary Spark Breakdown in Air as Revealed by Photomultipliers and Fast Oscilloscopic Techniques

Hudson, Gilbert Glover; Loeb, Leonard B.

doi:10.1103/physrev.123.29

Cited by 60 publications

(22 citation statements)

References 28 publications

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“…The former propagates along the PPS channel at a considerably slower speed than that of the PPS and makes the corona channel expand and its luminosity durable. We will call this the secondary positive streamer (SPS) [13]. Another wave propagates along the projected part mentioned above toward the anode, enhancing its luminosity and is reflected from the anode and then propagates toward the cathode to catch up with and accelerate the SPS.…”

Section: /50=26+52 D (Kv)mentioning

confidence: 99%

Flashover phenomena in positive rod‐to‐plane air gaps under impulse and DC voltages

Tsuneyasu

Nisijima

Izawa

1992

Electrical Engineering Japan

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Discharge phenomena in positive rod‐to‐plane air gaps under lightning impulse and dc voltages were investigated. Under impulse voltages, the 50 percent flashover voltages agree with the 50 percent corona inception voltages only in a gap shorter than a certain value dc which increases with the rod diameter φ. The 50 percent flashover voltage at dc rises at a rate of about 14 kV/cm with dc in the range of dc < 2.8 cm (φ ⩽ 1.5 cm), and then it rises at a rate of about 5 kV/cm. Experimental results show that the flashover process in the former region (termed the Gp process) is different from that in the latter region (the Lp process). Under dc voltages, the critical gap length, at which the first corona may lead to flashover without any succeeding streamer corona, corresponds to dc under impulse voltage. In a gap shorter than dc flashover occurs through the Gp process (φ ⩽ 1 cm) or Lp process (φ ≥ 2 cm), but in gap longer than dc flashover may occur through another process which cannot be seen under impulse voltages. In this paper, those flashover characteristics and processes are described on the basis of experimental results and photographic observations with an image converter camera.

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Section: /50=26+52 D (Kv)mentioning

confidence: 99%

Flashover phenomena in positive rod‐to‐plane air gaps under impulse and DC voltages

Tsuneyasu

Nisijima

Izawa

1992

Electrical Engineering Japan

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“…However, the bridging of the electrodes by a streamer does not necessarily produce electrical breakdown [4,6]. Many streamers may arrive at the plane electrode before a sufficiently energetic one is followed by the breakdown discharge.…”

Section: Introductionmentioning

confidence: 98%

“…In particular the radial field, which builds up while space charge accumulates, can cause successive streamers to deviate further from the axis as they propagate toward the plane electrode [6] so that the final streamer together with the breakdown discharge often follow a path which is far from the axis of symmetry This paper describes an experimental investigation of the impulse voltage flashover trajectory in air between a hemispherically-ended rod and a plane electrode. The influence of voltage polarity and of varying the applied voltage over a short range about the 100% breakdown probability level were investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Streamers initiated in the vicinity of the rod electrode can travel far into the air gap before being quenched due to space-charge buildup ahead [lo, 111 while some may have enough energy to completely bridge the two electrodes [4,6]. However, the bridging of the electrodes by a streamer does not necessarily produce electrical breakdown [4,6].…”

Section: Introductionmentioning

confidence: 99%

“…Electrical breakdown of air in a rod-plane electrode system in certain respects is similar to that between point and plane since in many situations it is preceded by corona and streamer formation [4,6,9].…”

Section: Introductionmentioning

confidence: 99%

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