کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4991784 1457116 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A system for accurate measuring of thermal-structure displacement on a high speed rotating turbine disk by using digital image correlation technology
ترجمه فارسی عنوان
یک سیستم برای اندازه گیری دقیق جابجایی حرارتی در دیسک توربین چرخشی با سرعت بالا با استفاده از تکنولوژی همبستگی تصویر دیجیتال
کلمات کلیدی
همبستگی تصویر دیجیتال، جابجایی ساختار حرارتی، دیسک چرخشی، حرکت چرخشی تاری اثر حرارتی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
A non-contact rotational thermal-structure deformation measurement system based on digital image correlation (DIC-2D) technology was proposed and established to measure in-plane thermal-structure deformation on a high speed rotating disk accurately. Digital images can be captured at a constant rotor azimuth by applying a precise synchronisation strategy to coordinate the operating frequency and internal delays of a camera and a stroboscope. The relationship between false radial displacement and rotational motion blur (RMB) was quantified through a series of baseline tests. Firstly, the deformation of a disk was investigated by theoretical analysis considering windage heating and transient thermal loading effects to obtain the baseline for verification. Then, a flat metal disk was tested with windage heating effect to analyse the accuracy at rotational speeds that range from 3000 rpm to 6000 rpm. The model was also tested with three different thermal loading conditions at a fixed rotational speed of 3800 rpm to validate the reliability of the model. The comparison results revealed that the proposed system can accurately and reliably measure in-plane thermal structure deformation of a rotating disk with a tangential velocity of up to 200 m/s, and the maximum deviation was less than 15% at 3800 rpm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 113, 25 February 2017, Pages 36-46
نویسندگان
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