کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7154067 1462496 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal behavior of an isolator with mode transition inducing back-pressure of a dual-mode scramjet
ترجمه فارسی عنوان
رفتار حرارتی یک ایزولاتور با انتقال حالت باعث عقب ماندگی یک اسرارجت دوگانه می شود
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی هوافضا
چکیده انگلیسی
Combustion mode transition is a valuable and challenging research area in dual-mode scramjet engines. The thermal behavior of an isolator with mode transition inducing back-pressure is investigated by direct-connect dual-mode scramjet experiments and theoretical analysis. Combustion experiments are conducted under the incoming airflow conditions of total temperature 1270 K and Mach 2. A small increment of the fuel equivalence ratio is scheduled to trigger mode transition. Correspondingly, the variation of the coolant flow rate is very small. Based on the measured wall pressures, the heat-transfer model can quantify the thermal state variation of the engine with active cooling. Compared with the combustor, mode transition has a greater effect on the isolator thermal behavior, and it significantly changes the isolator heat-flux and wall temperature. To further study the isolator thermal behavior from flight Mach 4 to Mach 7, a theoretical analysis is carried out. Around the critical point of combustion mode transition, sudden changes of the isolator flowfield and thermal state are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Aeronautics - Volume 30, Issue 2, April 2017, Pages 595-601
نویسندگان
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