TY - GEN
T1 - Calculation of air temperature and pressure history During the operation of a flux compression generator
AU - Le, Xiaobin
AU - Rasty, Jahan
AU - Neuber, Andreas
AU - Dickens, Jim
AU - Kristiansen, Magne
N1 - Publisher Copyright:
© 2002 IEEE.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2001
Y1 - 2001
N2 - During the operation of Magnetic Flux Compression Generators (MFCG), the gas-plasma, shocked by the rapidly expanding armature, could lead to electrical arcing across the gas between the armature and the stator at locations where physical contact between the armature and stator has not yet occurred. This will result in a loss of magnetic flux and a decrease in the electrical efficiency of the MFCG. Therefore, knowledge of the ensuing gas temperature and pressure histories is necessary for identification of loss mechanisms in an effort to optimize the efficiency of MFCGs. This paper describes the procedure for estimating the air temperature and pressure histories via Finite Element (FE) simulation of the armature expansion and its ensuing contact with the stator in an MFCG. First, the validity of the FE model was verified by comparing deformation contours obtained from the simulations to those obtained experimentally via high-speed photography. Utilizing the pressure history data obtained from the FE results, the air temperature was theoretically calculated. The results indicate that the air pressure and temperature in an MFCG, having a compression ratio of 1.8, could be as high as 30 MPa and 4000° Kelvin, respectively.
AB - During the operation of Magnetic Flux Compression Generators (MFCG), the gas-plasma, shocked by the rapidly expanding armature, could lead to electrical arcing across the gas between the armature and the stator at locations where physical contact between the armature and stator has not yet occurred. This will result in a loss of magnetic flux and a decrease in the electrical efficiency of the MFCG. Therefore, knowledge of the ensuing gas temperature and pressure histories is necessary for identification of loss mechanisms in an effort to optimize the efficiency of MFCGs. This paper describes the procedure for estimating the air temperature and pressure histories via Finite Element (FE) simulation of the armature expansion and its ensuing contact with the stator in an MFCG. First, the validity of the FE model was verified by comparing deformation contours obtained from the simulations to those obtained experimentally via high-speed photography. Utilizing the pressure history data obtained from the FE results, the air temperature was theoretically calculated. The results indicate that the air pressure and temperature in an MFCG, having a compression ratio of 1.8, could be as high as 30 MPa and 4000° Kelvin, respectively.
UR - http://www.scopus.com/inward/record.url?scp=84952061765&partnerID=8YFLogxK
U2 - 10.1109/PPPS.2001.1001693
DO - 10.1109/PPPS.2001.1001693
M3 - Conference contribution
AN - SCOPUS:84952061765
T3 - PPPS 2001 - Pulsed Power Plasma Science 2001
SP - 939
EP - 942
BT - PPPS 2001 - Pulsed Power Plasma Science 2001
A2 - Reinovsky, Robert
A2 - Newton, Mark
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 17 June 2001 through 22 June 2001
ER -