کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10408921 | 893748 | 2005 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An experimental and numerical study of laser-induced spark in air
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The present work studied the expansion of a laser-induced spark in air. The experiments were carried out using the beam deflection technique. Numerical analysis used a simple one-dimensional spherical model and the governing equations were integrated numerically using the MacCormack predictor-corrector scheme. The present results indicated that the shock radius R is proportional to shock arrival time t0.4 and the shock pressure is proportional to Râ3 as functionally described by the blast wave theory. For the range of the spark energies from 15 to 50Â mJ, the shock front reached a distance of about 2Â mm within a few microseconds or less. During this period the shock-wave energy loss was from about 51% to 70%, the radiation energy losses accounted for were from 22% to 34%, and the energy of the remaining hot gas, was about 7-8% of the absorbed energy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 43, Issue 2, February 2005, Pages 113-129
Journal: Optics and Lasers in Engineering - Volume 43, Issue 2, February 2005, Pages 113-129
نویسندگان
Tran X. Phuoc,