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dc.creatorWeeks, D.A.en
dc.creatorWeldon, W.Fen
dc.creatorZowarka, Jr, R.C.en
dc.date.accessioned2016-02-09T22:04:28Zen
dc.date.available2016-02-09T22:04:28Zen
dc.date.issued1987-12en
dc.identifierPN_121en
dc.identifierdoi:10.15781/T21D41en
dc.identifier.citationD.A. Weeks, W.F. Weldon, and R.C. Zowarka, Jr., “Plasma armature railgun launcher simulations,” IEEE Transactions on Plasma Science, vol. 17, no. 3, June 1989, pp. 403-408.en
dc.identifier.urihttp://hdl.handle.net/2152/32958en
dc.description.abstractThe Center for Electromechanics at the University of Texas (CEM- UT) at Austin has developed a velocity dependent friction model which accurately predicts the losses associated with a plasma armature railgun while performing research associated with several Defense Advanced Research Projects Agency (DARPA) contracts. Test results from CEM-UT's 1 m long, 1.27 cm square bore, plasma-armature railgun have been used to determine the validity of the model. Deviation between calculated and measured performance is typically less than 5% at railgun currents below 500 kA, however, at currents greater than 500 kA, the deviation increases. Experimental evidence suggests that the rail gun' s lack of stiffness and subsequent venting of driving pressure rather than the electromechanical model is primarily responsible for the divergence between predicted and measured results. To test this theory a railgun was built using external preloading rings (Ringfeder®) to increase its stiffness. On the first test of the Ringfeder® railgun, 700 kA was discharged into the gun and the projectile was accelerated to 5.9 km/s. Test data indicates that the projectile accelerated through the entire length of the railgun and that a minimum amount of plasma leakage had occurred during the test. An analysis of the 700-kA test was done to compare the results of CEM-UT's frictional loss model to ablation and viscous drag loss models.en
dc.language.isoenen
dc.relation.ispartofCEM Publicationsen
dc.subjectRotating Machine EM Launchen
dc.subjectarmatureen
dc.subjectem gunen
dc.subjectem railgunen
dc.titlePlasma Armature Railgun Launcher Simulationsen
dc.typeconference paperen
dc.description.departmentCenter for Electromechanicsen
dc.rights.restrictionopenen


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