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
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
نویسندگان
, ,