کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6475131 1424968 2017 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Liquid lens-based optical sectioning tomography for three-dimensional flame temperature measurement
ترجمه فارسی عنوان
توموگرافی مقیاس نوری بر اساس لنز مایع برای اندازه گیری دمای سه بعدی شعله
کلمات کلیدی
توموگرافی بخش بندی نوری، دمای شعله، اندازه گیری، کالیبراسیون، لنز مایع
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

Measurement of three-dimensional temperature field of a flame plays a significant role in in-depth insight into combustion process. This paper proposes a novel optical sectioning tomography for the measurement of three-dimensional temperature of flame through a single camera in combination with an ionic electrowetting-based variable focus liquid lens. Firstly, the optical sectioning imaging principle is introduced based on a variable focus liquid lens. Secondly, the calibration works are carried out on a liquid lens-based optical sectioning tomography system for three-dimensional flame temperature measurement to determine the relationship between the working voltages of the liquid lens and its focal planes in combination with entropy function. Further Gaussian model is taken as the defocused model to calibrate the point spread function of the system through edge method, and the CCD sensor is calibrated by a black body furnace to find out the relationship between the image gray and the received radiation energy. The reconstruction algorithms for three-dimensional flame luminosity distribution of the combustion flame are also developed. Finally experimental works are undertaken to evaluate the optical sectioning tomography system. Preliminary experimental results on an ethylene-air co-flow burner verified the feasibility of the optical sectioning tomography for the three-dimensional temperature distribution of a diffusion flame. The developed optical sectioning tomography system is capable of characterizing the structure and combustion characteristics of the diffusion flame.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 196, 15 May 2017, Pages 550-563
نویسندگان
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