شبیه‌سازی عددی جریان نا‌پایا و محاسبه ضریب انتقال حرارت در پوسته موتور سوخت جامد

اسفندی, محسن; مؤیدی, محمدکاظم

doi:10.22034/jtae.2024.8.1.3

شبیه‌سازی عددی جریان نا‌پایا و محاسبه ضریب انتقال حرارت در پوسته موتور سوخت جامد

نوع مقاله : علمی پژوهشی

نویسندگان

محسن اسفندی ¹

محمدکاظم مؤیدی ²

¹ کارشناسی‌ارشد، گروه مهندسی مکانیک، دانشگاه قـم، قم، ایران

² دانشیار، گروه مهندسی مکانیک، دانشگاه قـم، قم، ایران

10.22034/jtae.2024.8.1.3

چکیده

در این مطالعه شبیه‌سازی بالستیک داخلی و جریان‌های خروجی از موتور سوخت جامد، بررسی شده است. میدان جریان در نظر گرفته شده در این مسئله شامل گرین استوانه‌ای و دیواره جامد موتور و دامنه جریان در خروجی نازل، مورد ارزیابی و تحلیل قرار گرفته است. معادلات جریان به‌صورت متقارن محوری و با فرض تراکم‌پذیری برای پدیده سوزش سوخت در حالت سوزش غیر فرسایشی، بکار گرفته شده‌است. در مطالعه حاضر، گرین سوخت از نوع استوانه‌ای، که از کاربردترین نوع گرین های سوخت به لحاظ سادگی درتولید می باشد، در نظر گرفته شده‌است. به جهت نزدیکی بیشتر مدل شبیه‌ساز به فرآیند واقعی، از توابع تعریف شده توسط کاربر در نرم افرار فلوئنت، برای توصیف برخی کمیت‌ها و پدیده‌های خاص مسئله مورد بررسی، استفاده شده‌است. در پایان نتایج حاصل از شبیه‌سازی در حالت‌های مختلف سوزش سوخت، مورد بررسی و نشان دهنده دقت مدل شبیه‌ساز با استفاده از وارد کردن پارامترهای تاثیر گذار بر سوزش سوخت می‌باشد.

کلیدواژه‌ها

موتور سوخت جامد

گرین سوخت

سوزش فرسایشی

نرخ سوزش

انتقال حرارت

موضوعات

پیشرانش/ترمودینامیک/انتقال حرارت/سوخت و احتراق/انرژی/...

عنوان مقاله English

Numerical Simulation of Unsteady Flow and Calculation of Heat Transfer Coefficient inside the Solid Propellant Engine Shell

نویسندگان English

Mohsen Esfandi ¹

Mohammad Kazem Moayyedi ²

¹ M.Sc., Department of Mechanical Engineering, University of Qom, Qom, Iran

² Associate Professor, Department of Mechanical Engineering, University of Qom, Qom, Iran

چکیده English

In this study, the simulation of internal ballistics and the exhaust flow of a solid propellant engine have been investigated. The flow field considered in this problem including the cylindrical grain and the solid wall of the engine and the flow at the nozzle outlet have been studied. The governing equations are used in an axisymmetric and compressible form to model the fuel combustion in non-erosive combustion mode. In the present study, cylindrical type of grain fuel is considered, which is one of the most useful types of fuel grains in terms of simplicity in production. To obtain the results from the simulation model which are close to the real data, used UDF modules in the Fluent software to describe some specific quantities and phenomena of the problem. Finally, the results obtained from the simulation in different modes of fuel burning are examined and show the accuracy of the numerical model by entering the parameters affecting the fuel burning.

کلیدواژه‌ها English

Solid Fuel Propellants

Fuel Grain

Erosive Burning

Burning Rate

Heat Transfer

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