基于CFX计算的离心压缩机整级全流道流场分析-王维民基于CFX计算的离心压缩机整级全流道流场分析-王维民.pdf

基于 CFX 计算的离心压缩机整级全流道流场分析 1 1* 1 2 [刘宾宾 王维民 张娅 吴炯 ] [1-北京化工大学 高端机械装备健康监控与自愈化北京市重点实验室，北京 100029 2-华陆工程科技有限责任公司，西安 710065] [ 摘摘 要要 ] 离心式压缩机是压缩和输送能源和化工生产中各种气体的关键设备，在整套装 摘摘 要要 置中占有极其重要的地位。近年来，叶轮两侧间隙内流体流动对转子的激励作用成为影响压 缩机性能进一步提升的重要因素。本文充分考虑了离心压缩机设计过程中的多个影响因素， 建立离心压缩机整级全流道流体动力学分析模型，包括密封间隙和轮盘轮盖两侧间隙内的流 场区域，计算分析离心压缩机内部一次流及二次流流场分布。通过该模型，分析二次流对一 次流的干扰作用，并且根据叶轮两侧间隙内的流场，分析间隙内的压力分布，更准确的计算 叶轮的气动推力。本文成果可为改进离心压缩机设计和优化压缩机性能，提高运行效率及稳 定性提供技术基础。 [ 关键词关键词 ] 离心压缩机 整级 数值模拟 二次流 关键词关键词 Investigation on the Flow Field in All Channel of a Centrifugal Compressor Stage Based on CFX [Binbin Liu 1 Weimin Wang 1* Ya Zhang 1 Jiong Wu 2] [ Abstract ] Centrifugal compressor is key equipment for energy and chemical production to compress and transport process gas. In recent years, it is found that the influence of flow within the two sides of impeller clearance to be an more important factor to prevent improving the performance of centrifugal compressor. This paper has fully considered multiple factors affecting centrifugal compressor performance and established fluid dynamics analysis model of all channel for whole stage of centrifugal compressor ，including seal clearance and cavities for two sides of impeller. Then the field distribution of primary and secondary flow was analyzed. By this model， we can analysis the exciting effect of secondary flow. Also, we can get the pressure distribution inside the space of both impeller sides clearance. This will help to calculate impeller pneumatic thrust more accurately. The results of this paper may contribute to improve centrifugal compressor design and optimization of compressor performance. It also provided technical basis for improving the operation efficiency and stabi