A Consideration for Design of Ammonium Perchlorate/Hydroxyl Terminated Polybutadiene Composite Propellant

investigating the feasibility of a proposed model for geometric design of deployable arch structures

deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...

تاثیر استفاده از آمونیوم پرکلرات با دو اندازه (درشت و ریز) بر ویسکوزیته پیشرانه جامد مرکب‌(علمی-پژوهشی)

Concentrated suspension of binders in composite propellant causes a complex phenomena so that controlling of rheology properties is difficult due to high percentage of fillers. Composite solid propellant contains paste suspension of mixtures of different components, e.g. oxidizer, fuel and binder. Increasing the percentage of solid phase without increment of viscosity is an important subject in...

CONSIDERATION OF DESIGN FOR PRODUCTION PRINCIPLES IN SHIP HULL DESIGN

In designing for ship production, the production method should be considered and it’s possible to reduce the manufacturing cost in designing procedure. A review of background of ship design that had minimized production costs, shows the principles and problems of these methods. Modern designing methods for manufacturing, considers hydrodynamic efficiency and less manufacturing cost. Quant...

HTPB-Polyurethane: A Versatile Fuel Binder for Composite Solid Propellant

مروری بر رفتار تجزیه حرارتی آمونیوم پرکلرات در حضور نانوکاتالیزورهای اسپینلی(علمی-ترویجی)

Composite solid propellants are the major source of chemical energy in space vehicles and missiles. Composite propellants are composed of crystalline oxidizer particles dispersed in polymeric fuel binder. Ammonium perchlorate (AP) is used as the most common oxidizer and hydroxyl terminated polybutadiene (HTPB) as the fuel binder. The ballistics of a composite propellant can be improved by addin...