مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

بررسی آزمایشگاهی اثر عوامل مختلف در عملکرد دستگاه تفنگ‌گازی و بررسی عددی تخمین فشار پارگی در دیسک فداشونده

نوع مقاله : پژوهشی اصیل

نویسندگان
سامان جعفری 1
علی علوی نیا 2
1 دانشجوی دکتری دانشکده مهندسی دانشگاه بوعلی سینا همدان
2 استاد گروه مکانیک دانشگاه بوعلی سینا همدان
10.52547/mme.22.9.579
چکیده
هدف این پژوهش، بررسی عوامل موثر بر افزایش سرعت خروجی پرتابه در دستگاه تفنگ­ گازی می­باشد. در بخش اول، اثر عوامل مختلف مانند شکل سابوت، ابعاد سابوت، عمق شیار دیسک و هندسه قطعه نگهدارنده­ دیسک فداشونده، مسیر حرکت پرتابه از لحظه شروع حرکت تا خروج از دهانه­ لوله و نوع گاز مورد استفاده برای شلیک، بر سرعت خروجی پرتابه مورد بررسی قرار گرفته­است. در هر مرحله از آزمایش­ها یک عامل مورد توجه بوده و تاثیر آن در بهبود عملکرد دستگاه تفنگ گازی بررسی شده است. بر اساس نتایج حاصل از بررسی عوامل موثر بر سرعت خروجی پرتابه، هندسه جدید سابوت و صاف و بدون انحنا بودن لوله دستگاه (مسیر حرکت پرتابه) به ­ترتیب، با 12/24 و 81/20 درصد افزایش در سرعت پرتابه بیشترین و نوع گاز مورد استفاده برای شلیک با 99/2 درصد افزایش در سرعت پرتابه کمترین اثر را در عملکرد دستگاه تفنگ ­گازی داشتند. در بخش دوم پژوهش حاضر با استفاده از نرم افزار LS-Dyna فشار مورد نیاز و نحوه پارگی دیسک فداشونده در عمق شیارهای مختلف بررسی و با نتایج تجربی مقایسه شدند. شکل پارگی و فشار لازم برای پارگی دیسک فداشونده حاصل از روش عددی با نتایج آزمایشگاهی مطابقت خوبی دارد.

کلیدواژه‌ها
روش اجزاء محدود
تفنگ‌گازی
دیسک فداشونده
سابوت
فشار پارگی

موضوعات

عنوان مقاله English

Experimental Study of the Effect of Different Factors on the Performance of the Gas Gun Device and Numerical Study of the Rupture Pressure Estimate in the Rupture Disk

نویسندگان English

saman jafari 1
َََAli Alavi Nia 2
1 PhD student, Faculty of Engineering, Bu Ali Sina University, Hamadan
2 Professor, Department of Mechanics, Bu Ali Sina University, Hamadan
چکیده English

In this study, the purpose is to evaluate the effective factors in the increase of projectile velocity in the gas-gun device. At first, the effect of various factors such as the shape and dimensions of the sabot, groove depth and the shape of the Rupture Disk holder, the path of the projectile from the moment of movement to the exit from the tube, and the type of gas used for launching are investigated. In each step of the experiments, a factor is evaluated and its effect on improving the performance of the gas-gun device is investigated. Based on the results of the study of effective factors the velocity of the projectile the shape of the sabot, and the projectile movement path with a 24.12 and 20.81% increase in projectile velocity respectively, the maximum and the type of gas used with 2.99% increase in projectile velocity had the minimum effect on the performance of the gas-gun device. In the second part of the present study, using the finite element method by LS-Dyna, the required pressure and rupture shape of the Rupture Disk in different grooves were investigated and compared with the experimental results. The shape of the rupture and the pressure required to rupture the Rupture Disk from the numerical method are in good agreement with the experimental results.

کلیدواژه‌ها English

finite element method
Gas gun
Rupture Disk
Sabot
Rupture Pressure
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مهندسی مکانیک مدرس
دوره 22، شماره 9
شهریور 1401
صفحه 579-590