基于空气动力学的土工离心机造型优化设计

Appearance Design of Geotechnical Centrifuge Based on Aerodynamic Analysis

土工离心机的空气动力学性能直接影响其在亚声速运行状态下运行的稳定性。以降低离心机高速运行时的空气阻力为优化目标,对造型进行空气动力学优化设计探索。在使用参数化建模方法建立的离心机简化模型的基础上,根据阻塞效应反求方法定义计算流场域。采用计算流体力学方法对土工离心机以及周围流场进行空气动力学分析,分析结果为优化提供了理论支持,对离心机的空气动力学性能敏感位置进行了造型优化,对设计变量与性能变化进行相关性分析。结果表明空气阻力伴随关键位置造型的变化呈现单调性变化,优化后的土工离心机空气动力学性能提升效果显著。

The aerodynamic performance of geotechnical centrifuge directly affects its stabilization under subsonic operating statue. In order to reduce the aerodynamic drag during the centrifuge running with high speed, exploring the aerodynamic optimization design of the appearance. Based on building simplified centrifuge model method of parametric modeling, defining the calculating flow field according to reverse solving based on blockage effects theory. Aerodynamic analyzing the geotechnical centrifuge and its surrounding flow field by the method of computational fluid dynamics, the results of analysis provide theoretically support to optimization, optimizing aerodynamic performance of the crucial area of the centrifuge by appearance designing, correlation analyzing the size variables and the performance changes. The results prove that aerodynamic drag changes monotonously with the appearance changes on crucial area, and the aerodynamic performance improvement of the optimized geotechnical centrifuge is remarkable.