شبیه‌سازی موتور پیشرانه جامد شامل گرین پیچیده با در نظر گرفتن پس‌روی سه‌بعدی و میدان جریان شبه‌ یک‌بعدی

شبیه‌سازی عددی سه‌بعدی پسروی گرین در موتور موشک سوخت جامد براساس روش مجموعه سطوح

مدل‌سازی شبه یک‌بعدی بالستیک داخلی راکت سوخت جامد با در نظر گرفتن مدل سوزش فرسایشی سادرهلم

In this study, different flow analysis models in solid rocket motor are introduced. Amongst these models, some are not capable of predicting the effects of significant phenomena such as erosive burning and longitudinal acceleration. In order to consider these effects on the internal ballistic, a quasi-one-dimensional model was developed which employs generalized flow equations. A non-viscous an...

شبیه‌سازی عددی پسروی گرین‌های پیچیده سه‌بعدی در موتورهای سوخت جامد با روش سطوح هم‌تراز(علمی-پژوهشی)

In this research and according to level set method, 3D complex grains burn-back analysis is numerically simulated. The complicated grains that we have considered in this research, are included four types of difficulties that are insulated regions, different burning rates, non-uniform burning rates and oriented burning rates. To this end, the classical algorithm that is developed by authors, wil...

تحلیل عددی پسروی گرین موتورهای سوخت جامد با روش منحنی‌های تراز بهبودیافته (علمی-پژوهشی)

In this research the two dimensional grain burn-back, based on improved level set method is studied. In the first step, the distance function is evaluated according to creation of an unstructured grid in the inner surface and Cartesian structured grid in the outer surface of the grain. Then, with derivation of final form of the level set equations, the solid propellant burning area and port are...

اثر بربرین در تنظیم آستروسیتهای Gfap+ ناحیه هیپوکمپ موشهای صحرایی دیابتی شده با استرپتوزوتوسین

Background: Diabetes mellitus increases the risk of central nervous system (CNS) disorders such as stroke, seizures, dementia, and cognitive impairment. Berberine, a natural isoquinolne alkaloid, is reported to exhibit beneficial effect in various neurodegenerative and neuropsychiatric disorders. Moreover astrocytes are proving critical for normal CNS function, and alterations in their activity...

اثر بربرین در تنظیم آستروسیتهای Gfap+ ناحیه هیپوکمپ موشهای صحرایی دیابتی شده با استرپتوزوتوسین

Background: Diabetes mellitus increases the risk of central nervous system (CNS) disorders such as stroke, seizures, dementia, and cognitive impairment. Berberine, a natural isoquinolne alkaloid, is reported to exhibit beneficial effect in various neurodegenerative and neuropsychiatric disorders. Moreover astrocytes are proving critical for normal CNS function, and alterations in their activity...