【摘要】 将平行异向双螺杆的加料段、塑化段和均化段分别建立物理模型和数学模型，并通过EDEM、Fluent和Poly??flow软件对平行异向双螺杆成型改性双基推进剂过程进行模拟仿真，分别研究螺杆啮合间隙和螺杆机筒间隙的改变对挤出加工过程温度、压力等参数的影响规律，所得结果有助于双螺杆挤出螺杆间隙的设计，以提高改性双基推进剂的成型过程的安全性。更多还原

【Abstract】 In this study, physical and mathematical models were developed for the feeding, plasticizing, and homogeniz??ing sections of a parallel counter??rotating twin??screw extruder. The extrusion process of modified double??base propellant was simulated using a combination of EDEM, ANSYS Fluent, and Polyflow software. The influence of key geometric parameters??specifically, the screw intermeshing clearance and the screw??barrel clearance??on critical extrusion variables such as temperature and pressure was systematically investigated. The simulation results provide valuable insights into the relationship between screw clearance design and process stability, offering practical guidance for optimizing twin ??screw extruder configurations. This work contributes to enhancing the safety and reliability of the modified double??base propellant molding process by enabling more precise control over thermal and mechanical conditions during extrusion.更多还原