کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9692813 1458845 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical simulation of capillary plasma flow generated by high-current pulsed power
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Numerical simulation of capillary plasma flow generated by high-current pulsed power
چکیده انگلیسی
Pulsed plasma discharge in the interior region of electrothermal-chemical gun is numerically investigated with the one-dimensional time-dependent mathematical modeling that includes the Joule heating of plasma column and the mass ablation of bore wall. Sonic boundary condition is utilized because flow is expected to be choked at the bore exit. In the evaluation of thermodynamic and transport properties, plasma state is assumed to be in local thermal equilibrium due to high pressure and is found to be weakly nonideal. The computational results show that capillary plasma flow at the bore exit is partially ionized high temperature and high pressure discharge. Many predicted data including arc resistance, energy deposition, and bore wall mass ablation are favorably compared with the measurements on total 8 shots of gun firings with different levels of energy deposition ranging from 5.3 to 47 kJ. Temporal evolution of pressure shows transient effect in the calculations but the effect is minimal compared to the significant transient effect in the pressure measurements. However, maximum pressure is in good agreement with measured data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Thermal Sciences - Volume 44, Issue 11, November 2005, Pages 1039-1046
نویسندگان
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