کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7915407 1511019 2018 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Void fraction measurement in cryogenic flows. Part I: Design and validation of a void fraction capacitive sensor
ترجمه فارسی عنوان
اندازه گیری کسری ضخیم در جریانهای فریزر. قسمت 1: طراحی و اعتبارسنجی یک حسگر خازنی قطری خالی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
This manuscript presents the design of a capacitive void fraction sensor for cryogenic LN2 two phase flows and its validation at room conditions. The capacitive void fraction sensor is first designed by means of Electric Field Analysis (EFA) simulations taking into account specific technical constraints coming from the test section in which it should be accommodated. Then it is manufactured and validated using a proper combination of fluids (Polydimethylsiloxane (PDMS) and air) having a dielectric constant ratio similar to the one encountered in LN2/GN2 two phase flows. The validation is performed through comparison with void fraction measured by means of optical visualizations and shows how the capacitive measurement technique robustness allows obtaining reasonable accurate values of void fraction also for the substitute fluid case. The sensor presented in this manuscript was used to evaluate the void fraction during LN2 chilldown of a rectangular cooling channel and the results are presented in the second part of this work.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cryogenics - Volume 94, September 2018, Pages 36-44
نویسندگان
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