کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5472214 | 1519923 | 2017 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A study of performance parameters on drag and heat flux reduction efficiency of combinational novel cavity and opposing jet concept in hypersonic flows
ترجمه فارسی عنوان
مطالعه پارامترهای عملکرد در کارآیی کاهش کشش و کاهش جریان شار حرارت حفره ریشه ترکیبی و مفهوم مخالف جت در جریان های هیپرسیونیکی
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کلمات کلیدی
جریان هوای فشرده، کشیدن و کاهش حرارت، حفره رو به جلو، مخالف جت، شرایط عملیات جت، زاویه حمل و نقل آزاد ابعاد فیزیکی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی هوافضا
چکیده انگلیسی
The drag reduction and thermal protection system applied to hypersonic re-entry vehicles have attracted an increasing attention, and several novel concepts have been proposed by researchers. In the current study, the influences of performance parameters on drag and heat reduction efficiency of combinational novel cavity and opposing jet concept has been investigated numerically. The Reynolds-average Navier-Stokes (RANS) equations coupled with the SST k-Ï turbulence model have been employed to calculate its surrounding flowfields, and the first-order spatially accurate upwind scheme appears to be more suitable for three-dimensional flowfields after grid independent analysis. Different cases of performance parameters, namely jet operating conditions, freestream angle of attack and physical dimensions, are simulated based on the verification of numerical method, and the effects on shock stand-off distance, drag force coefficient, surface pressure and heat flux distributions have been analyzed. This is the basic study for drag reduction and thermal protection by multi-objective optimization of the combinational novel cavity and opposing jet concept in hypersonic flows in the future.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Astronautica - Volume 131, February 2017, Pages 204-225
Journal: Acta Astronautica - Volume 131, February 2017, Pages 204-225
نویسندگان
Xi-wan Sun, Zhen-yun Guo, Wei Huang, Shi-bin Li, Li Yan,