کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7052301 | 1457415 | 2015 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Phase-detection probe measurements in high-velocity free-surface flows including a discussion of key sampling parameters
ترجمه فارسی عنوان
اندازه گیری پروب تشخیص فاز در جریانهای آزاد با سرعت بالا شامل بحث در مورد پارامترهای نمونه برداری کلیدی است
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Air-water high-velocity flows are characterised by strong interactions of air bubbles and water droplets. The void fraction ranges from a few percent in bubbly flows to up to 100% at the free-surface and a reliable measurement instrumentation is the phase-detection intrusive probe. Herein new experiments were conducted on a stepped spillway (θ = 26.6°) in transition and skimming flow sub-regimes yielding new insights into the turbulent air-water flow properties including the turbulence intensities and integral turbulent time and length scales. The integral turbulent scales showed self-similarity independently of the flow regime. A sensitivity analysis was conducted on the phase-detection probe signals to investigate the optimum sampling duration and frequency as well as the data analysis parameters threshold, sub-sampling duration, histogram bin sizes and cut-off effects. The results provide recommendations in terms of optimum sampling and processing parameters for high-velocity air-water flows.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 61, February 2015, Pages 66-78
Journal: Experimental Thermal and Fluid Science - Volume 61, February 2015, Pages 66-78
نویسندگان
Stefan Felder, Hubert Chanson,