哈尔滨工程大学学报2016，Vol.37Issue(4)：592-597,6.DOI:10.11990/jheu.201501026
对旋风机变工况下两级叶轮变转速匹配研究
Speed matching oft wo-stage impeller with counter-rotating fan under variab le operating conditions
摘要
Abstract
A method for speed matching of two-stage impellers was proposed herein to prevent overloading of the second-stage impeller under low flow rates, as well as to solve the low pressure rise or low efficiency problem under high flow rates.The formula for speed-matching of two-stage impellers under different operating conditions was de-rived by using the velocity triangle, and modified through numerical analysis.The numerical simulation results show that the pressure rise and shaft power of two-stage impellers are distributed equally, while the pressure rise of fan is maintained invariant because of the two-stage impeller′s speed matching.Thus, the overload problem of the second-stage impeller is avoided.The operation efficiency under the high flow rate condition is improved, and the high-effi-ciency working range of counter-rotating fan is expanded.关键词
对旋风机/电机过载/转速匹配/功率特性/变工况/性能优化Key words
counter-rotating fan/motor overload/speed matching/power characteristics/variable operating condi-tion/performance optimization分类
机械制造引用本文复制引用
艾子健,秦国良,和文强,陈雪飞..对旋风机变工况下两级叶轮变转速匹配研究[J].哈尔滨工程大学学报,2016,37(4):592-597,6.基金项目
国家重点基础研究发展计划（2012 CB026004）；福建省教育厅科技A类项目（ JA15471）． （）
