کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8942040 | 1645051 | 2018 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Length to diameter ratio effect on heat transfer performance of simple and compound angle holes in thin-wall airfoil cooling
ترجمه فارسی عنوان
تأثیر نسبت طول به قطر بر عملکرد انتقال حرارت از سوراخ زاویه ساده و مرکب در خنک کننده هوافول نازک دیوار
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Heat transfer coefficients on a flat plate surface downstream a row of simple and compound angle cylindrical holes are investigated using high-resolution thermographic liquid crystal technique. A variation of flow parameters including blowing ratio, and geometry parameters including compound angle and length-to-diameter ratio are examined. Blowing ratios (M) ranging from 0.3 to 2, length to diameter ratios (L/D) from 0.5 to 5, and two compound angle (β: 0°, 45°) are employed composing a test matrix of 70 test cases. Detailed local, spanwise averaged, and area averaged heat transfer coefficients hf/h0 are presented to illustrate the effect of length-to-diameter ratio and compound angle. The film cooling performance is also evaluated using NHFR method and ÎÏ method by combining adiabatic film effectiveness and heat transfer coefficient data. Results indicate that ÎÏ method has superiority in evaluating film cooling performance due to its direct reflection of temperature reduction by film protection.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 127, Part C, December 2018, Pages 867-879
Journal: International Journal of Heat and Mass Transfer - Volume 127, Part C, December 2018, Pages 867-879
نویسندگان
Weihong Li, Xueying Li, Jing Ren, Hongde Jiang,