شبیه‌سازی و تحلیل عددی یک موتور اسکرمجت نمونه (دی ال ار) در شرایط احتراقی و غیر احتراقی

نوع مقاله : مقاله پژوهشی

نویسندگان

عضو هیات علمی / دانشگاه صنعتی مالک اشتر

چکیده

در این مقاله، فرایند احتراق در یک موتور اسکرم جت نمونه (DLR) از دیدگاه عددی شبیه­ سازی و تحلیل شده است. برای انجام این مدل­ سازی ابتدا این موتور برای حالت غیراحتراقی شبیه‌سازی و اعتبارسنجی شده است. نتایج این بخش نشان می­ دهد که روش استفاده­ شده توانایی پیش­‌بینی میدان‌های سرعت و فشار را با دقت مناسبی دارد. در ادامه مسئله با درنظرگرفتن فرایند احتراق و با درنظرگرفتن یک واکنش شیمیایی شبیه‌سازی شده است. نتایج حاصل از دو تحلیل انجام­ شده نشان می­دهد که در حالت احتراقی ناحیه فروصوت تا فاصله 141 میلی­متری از پشت مانع ادامه دارد، این در حالی است که برای حالت غیراحتراقی این فاصله تنها 22 میلی­ متر است. در حالت غیراحتراقی موج­ ها پس از برخورد با جت با اندکی انحراف از آن عبور می­ کنند، در حالی که در حالت احتراقی موج­ ها بعد از برخورد با جت بازتاب داده می­ شوند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The numerical simulation and analysis of a prototype scramjet (DLR) in reacting and non-reacting conditions

نویسندگان [English]

  • jamasb pirkandi
  • Mostafa Mahmoodi
Faculty of Aerospace, Malek Ashtar University of Technology
چکیده [English]

In this paper, the combustion process in a prototype scramjet (DLR) is numerically simulated and studied. To that end, the scramjet is initially simulated and validated in the non-reacting condition. The results show that the method used has the ability to predict the fields of velocity and pressure with appropriate accuracy. Then, the same scramjet is simulated and validated for the reacting case by considering one-reaction model. The results of these two simulations illustrates that the maximum distance of subsonic area from the strut is 141 mm in the reacting case while this distance is only 22 mm in the non-reacting case. the waves pass through the jet region with a slight deviation in the non-reacting case while they are reflected after hitting the jet region in the reacting case.the waves pass through the jet region with a slight deviation in the non-reacting case while they are reflected after hitting the jet region in the reacting case.

کلیدواژه‌ها [English]

  • Supersonic combustion
  • Scramjet
  • Numerical Simulation
  • Turbulent flow
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