کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
709750 892086 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Wire-mesh sensors for high-resolving two-phase flow studies at high pressures and temperatures
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
پیش نمایش صفحه اول مقاله
Wire-mesh sensors for high-resolving two-phase flow studies at high pressures and temperatures
چکیده انگلیسی

Wire-mesh sensors are used for a high-speed visualization of a gas–liquid flow as well as for the measurement of void fraction profiles, bubble size distributions and gas velocity distributions. Recent progress was made in designing and constructing such sensors for an application in a hot steam–water mixture. Two types are presented: (1) a sensor with an inner diameter of 52.3 mm with a measuring matrix of 16×16 and (2) a sensor of 195 mm inner diameter with 64×64 measuring points. Both devices can be operated at 7 MPa and a temperature of max. 286 ∘C. The spatial and temporal resolutions are equal to earlier used sensors for air–water flow at ambient conditions (3 mm, 2500 fps). In the paper, the function of the sensors is illustrated by presenting flow visualizations obtained at two vertical test sections of the Rossendorf TOPFLOW facility. The pipes are approximately 9 m long and have inner diameters equal to the diameters of the measuring cross sections mentioned above. The results show how the flow structure depends on the thermodynamic parameters by comparing measurements performed at 1, 2, 4 and 6.5 MPa and 180, 212, 250 and 280 ∘C, correspondingly, under adiabatic conditions with earlier air–water tests.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Flow Measurement and Instrumentation - Volume 18, Issue 2, April 2007, Pages 87–94
نویسندگان
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