skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices

Numerical and experimental investigation of dielectric recovery in supercritical N sub(2)

Zhang, J ; Markosyan, A H ; Seeger, M ; van Veldhuizen, E M ; van Heesch, E J M ; Ebert, U

Plasma sources science & technology, 2015-04, Vol.24 (2), p.1-16 [Periódico revisado por pares]

Texto completo disponível

Citações Citado por
  • Título:
    Numerical and experimental investigation of dielectric recovery in supercritical N sub(2)
  • Autor: Zhang, J ; Markosyan, A H ; Seeger, M ; van Veldhuizen, E M ; van Heesch, E J M ; Ebert, U
  • Assuntos: Breakdown ; Channels ; Decay ; Dielectric strength ; Electric potential ; Mathematical models ; Recovery ; Switches ; Voltage
  • É parte de: Plasma sources science & technology, 2015-04, Vol.24 (2), p.1-16
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    content type line 23
    ObjectType-Feature-2
  • Descrição: A supercritical (SC) nitrogen (N sub(2)) switch is designed and tested. The dielectric strength and recovery rate of the SC switch are investigated by experiments. In order to theoretically study the discharge and recovery process of the SC N sub(2) switch under high repetition rate operation, a numerical model is developed. For SC N sub(2) with initial parameters of p = 80.9 bar and T = 300 K, the simulation results show that within several nanoseconds after the streamer bridges the switch gap, the spark is fully developed and this time depends on the applied electric field between electrodes. During the whole discharge process, the maximum temperature in the channel is about 20 000 K. About 10 mu s after the spark excitation of 200 ns duration, the temperature on the axis decays to T sub(axis) [< or =, slant] 1500 K, mainly contributed by the gas expansion and heat transfer mechanisms. After 100 mu s, the dielectric strength of the gap recovers to above half of the cold breakdown voltage due to the temperature decay in the channel. Both experimental and numerical investigations indicate that supercritical fluid is a good insulating medium that has a proved high breakdown voltage and fast recovery speed.
  • Idioma: Inglês
Voltar para lista de resultados
Ir para página anteriorAnterior Resultado  10 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.