Research on Laval Nozzle and Overall Simulation Analysis Based on High Speed Precision Air Bearing Spindle Pneumatic Turbine System

Proceedings of the 2019 International Conference on Precision Machining, Non-Traditional Machining and Intelligent Manufacturing (PNTIM 2019) Pub Date : 2019-11-01 DOI:10.2991/pntim-19.2019.43

Du Xi, Fang-Ming Zhou, L. Bo, Zhang Jun-an

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Abstract

Laval nozzles for important component in highspeed precision air-floating spindle gas drive systems, to establish a cross-sectional ratio is calculated by analysis of their simplified model of the two stages. Use of computational fluid dynamics (CFD) to simulate the Structural parameters of Laval nozzle-pneumatic turbine and analyzed the gas flow and flow rate. The simulation results show that the airflow impinges on the turbine blades and then flows out to the surroundings. The gas flow is accelerated in the Laval nozzle, reaching a maximum at the outlet, and the dynamic pressure in the Laval nozzle is high, reaching a maximum at the nozzle outlet. The simplified Laval nozzle model meets the design requirements. Then the article analyzes the problems in the model simplification and lays the foundation for the subsequent engineering experiments Keywords-Laval Nozzle; Cross Section Ratio; CFD

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基于高速精密气轴承主轴气动涡轮系统的拉瓦尔喷嘴研究及整体仿真分析

拉瓦尔喷嘴作为高速精密气浮主轴气驱系统中的重要部件，通过对其两级的简化模型进行分析计算，建立了其截面比。采用计算流体力学(CFD)方法对拉瓦尔喷嘴-气动透平的结构参数进行了数值模拟，分析了燃气流量和流量。仿真结果表明，气流撞击涡轮叶片后向周围流动。气体在拉瓦尔喷嘴内流动加速，在出口处达到最大值，拉瓦尔喷嘴内动压力高，在喷嘴出口处达到最大值。简化后的拉瓦尔喷嘴模型满足设计要求。然后分析了模型简化中存在的问题，为后续的工程实验奠定了基础。关键词:拉瓦尔喷嘴;截面比;计算流体动力学

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Proceedings of the 2019 International Conference on Precision Machining, Non-Traditional Machining and Intelligent Manufacturing (PNTIM 2019)

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