مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

شبیه سازی دینامیک سیالات محاسباتی موج انفجار در نرم افزار اپن فوم: بررسی اثر حلگر و معادله حالت بر دقت نتایج

نوع مقاله : پژوهشی اصیل

نویسندگان
زینب نورپور
سعید توانگر روستا
حسین سوری
سید قربان حسینی
دانشگاه صنعتی مالک اشتر
10.52547/mme.22.12.747
چکیده
روش­ های عددی به عنوان یکی از زیر شاخه­ های مدل­ های نظری می­ توانند رفتار مواد پرانرژی را با دقت مناسب و به دور از محدودیت­ های آزمایشات تجربی پیش­ بینی نمایند. در این مطالعه، از ابزار دینامیک سیالات محاسباتی برای پیش­ بینی عملکرد موج انفجار در حضور موانع هندسی استفاده شده است. شبیه ­سازی­ ها با دو حلگر توسعه ­یافته سونیک­ فوم (extendedSonicFoam) و بلست فوم(blastFoam) از ماژول تکنولوژی متن باز اپن ­فوم (OpenFOAM) انجام شده و برای افزایش دقت نتایج، از مدل آشفتگی شبیه­ سازی گردابه­ های بزرگ استفاده شده است. علاوه بر معادله حالت گاز کامل، از معادله حالت نیمه تجربی بی-کا-دبلیو (BKW) که یک معادله حالت کامل است و وابستگی صریح به دما دارد برای ارتباط میان پارامترهای مختلف ترمودینامیکی استفاده شده است. برای ثبت سیگنال­ های فشار- زمان حسگر­های متعددی در بالا دست منفجره قرار گرفته و برای اعتبارسنجی نتایج نیز از داده ­های تجربی گزارش شده در منابع استفاده شده است. میزان خطا در شبیه سازی­ های انجام شده برای پارامترهای مختلف موج انفجار حداکثر 12/29% بدست آمده است. میزان انحراف از استاندارد برای نتایج حل عددی با معادله حالت گاز کامل نسبت به گاز حقیقی بیشتر بوده و حلگر بلست­ فوم پارامترهای مهم ماکزیمم اضافه فشار فاز مثبت، زمان رسیدن موج و ایمپالس فاز مثبت را که از مشخصه ­های تعیین کننده موج انفجار می­ باشند را با خطای کمتری نسبت به حلگر توسعه یافته سونیک­ فوم پیش ­بینی کرده است.
کلیدواژه‌ها
اپن‌ فوم
دینامیک سیالات محاسباتی
معادله حالت
انفجار
حلگر

موضوعات

عنوان مقاله English

Computational Fluid Dynamics Simulation of Blast Wave Using OpenFOAM: the Effect of Solver and Equation of State on the Results Accuracy

نویسندگان English

Zeinab Noorpoor
Saeed Tavangar Roosta
Hosein soury
Seyed Ghorban Hosseini
Malek-Ashtar university of technology
چکیده English

Numerical methods as one of the subcategories of theoretical models can predict the behavior of energetic materials with appropriate accuracy and away of experimental tests limitations. In this investigation, computational fluid dynamics tool has been used to predict the blast wave propagation with Consideration of geometrical obstacles. Two solvers (extendedSonicFoam and blastFoam) from the open source technology module, OpenFOAM have been used for simulations and To enhance confirmation with reality, large eddy simulation method was employed for turbulence modeling. In addition to the ideal gas equation of state (EOS), the BKW EOS, which is a complete EOS with an explicit temperature dependence, have been used to correlate the various thermodynamic parameters. Several gauges were positioned to record the pressure-time signals and the experimental data reported in the resources were used for validation. It should be noted that the maximum error of simulations was 12.29% for different blast wave parameters. deviation from standard for ideal gas numerical results was greater than that of real gas assumption and blastFoam solver has been predicted maximum positive phase overpressure, arrival time and positive phase impulse, which are the important parameters of blast wave, with less error in comparison to extendedSonicFoam solver.


کلیدواژه‌ها English

OpenFoam
Computational Fluid Dynamics
Equation of state
blast
Solver
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مهندسی مکانیک مدرس
دوره 22، شماره 12
آذر 1401
صفحه 747-757