کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1714171 1519926 2016 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of injection angle and pressure on mixing performance of fuel injection via various geometries for upstream-fuel-injected scramjets
ترجمه فارسی عنوان
اثر زاویه و فشار تزریق بر عملکرد مخلوط کردن تزریق سوخت از طریق هندسه های مختلف برای موتورهای تزریق سوخت بالا
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی هوافضا
چکیده انگلیسی


• Fuel/air mixing for upstream-fuel-injected scramjets is investigated numerically.
• Various injector geometries are considered for fuel mixing into Mach 5 crossflow.
• Effects of the injection angle and pressure on the mixing performance are examined.
• Considerable influence of the injection angle and pressure has been observed.

Effective fuel injection and mixing is of crucial importance for reliable operation of scramjet engines, where fuel must be injected into high-speed crossflow and mixed with air at an extremely short timescale. This paper presents the results of a numerical study that investigates the effects of the injection angle and pressure for various orifice shapes on fuel mixing characteristics into hypersonic airflow at Mach 5, aiming at the application to scramjet operation with upstream fuel injection at Mach 10. The mixing performance has been evaluated with respect to the mixing efficiency, total pressure recovery, fuel penetration, and streamwise circulation. Significant influence of the injection angle and intensity on the mixing has been observed in conjunction with the geometric features of the injector orifice. An additional performance parameter, namely the mixing vorticity effectiveness, has been found to be an effective measure to quantify the contribution of the streamwise vorticity in mixing enhancement.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Astronautica - Volume 128, November–December 2016, Pages 485–498
نویسندگان
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