SBIR Phase I: Optimization of Screw Geometry and Processing Conditions using Three-Dimensional Simulation of Melting and Melt Flow in Twin-Screw Extruders

SBIR 第一阶段：利用双螺杆挤出机中熔融和熔体流动的三维模拟来优化螺杆几何形状和加工条件

• 批准号: 0637451
• 负责人: Mahesh Gupta
• 金额: --
• 依托单位: Plastic Flow, LLC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-01-01 至 2007-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0637451&HistoricalAwards=false
• 关键词: SBIR; Phase; Optimization; Screw; Geometry

This Small Business Innovation Research (SBIR) Phase I project will develop software for three-dimensional simulation of the two-phase flow in a twin-screw extruder. Currently available analytical tools for design of twin-screw extruders are based upon simplified one-dimensional or two-dimensional analysis. However, the two-phase flow in twin-screw extruders is complex; and predictions from these simplified analyses cannot reliably predict the velocity, pressure and temperature distribution. The proposed software for three-dimensional simulation of the two-phase flow will incorporate a proprietary constitute theory that takes into account both the shear viscosity and the elongational viscosity of the polymer. Since the flow in intermeshing region of a twin-screw extruder is highly elongation dominated, the predictions from the proposed software will be more accurate than those from currently available tools that ignore the effect of elongational viscosity. The proposed technology will enhance the understanding of polymer flow in twin-screw extruders and will lead to developing innovative screw profiles. The use of this software will also enable various companies including plastic material suppliers, twin-screw extruder manufacturers and plastic compounders to cut costs.

这个小企业创新研究（SBIR）第一阶段项目将开发软件，用于双螺杆挤出机中两相流的三维模拟。目前可用于双螺杆挤出机设计的分析工具是基于简化的一维或二维分析。 然而，双螺杆挤出机中的两相流是复杂的;并且从这些简化分析的预测不能可靠地预测速度、压力和温度分布。所提出的用于两相流的三维模拟的软件将结合考虑聚合物的剪切粘度和拉伸粘度的专有构成理论。由于在双螺杆挤出机的啮合区域的流动是高度伸长主导，从建议的软件的预测将是更准确的比那些从目前可用的工具，忽略了拉伸粘度的影响。该技术将增强对双螺杆挤出机中聚合物流动的理解，并将导致开发创新的螺杆轮廓。 该软件的使用还将使包括塑料材料供应商，双螺杆挤出机制造商和塑料复合机在内的各种公司降低成本。