摘要
离心叶轮轴向力的计算是大型、高速离心压缩机设计的关键技术之一。本文以某0.17流量系数离心压缩机半开式叶轮为研究对象,采用数值模拟的方法对该叶轮在设计工况、变工况和变关键几何尺寸条件下的轴向力展开了计算和模拟分析。结果表明:半开式离心叶轮轴向力一维计算方法与本文所采用的数值模拟方法相比,两者误差为5.8%;轴向力随流量的增加呈现先增加后减小的趋势;当叶轮的转速增加时,叶轮轴向力在全流量范围内增加;当进气温度增加时,轴向力呈现线性下降趋势;当进气压力增加时,轴向力呈现线性增长趋势;当密封齿数增加时,叶轮轴向力线性增大,泄漏量逐渐减小。当密封轴颈增加时,叶轮轴向力先减小至平衡状态后再反向继续增加,泄漏量成倍数增长趋势。
The calculation of axial force of centrifugal impeller is one of the key technology of large-scale and high-speed centrifugal compressor.Taking the semi-open impeller of a 0.17 flow coefficient compressor as the research object,the axial force of the impeller under design conditions,variable conditions and variable key geometric dimensions were calculated and analyzed by numerical simulation.The results show that the error between the one-dimensional calculation method of the axial force of the semi-open centrifugal impeller and the numerical simulation method is 5.8%;The axial force increases first and then decreases with the increase of flow rate;When the rotational speed of the impeller increases,the axial force of the impeller increases in the full flow range;When the inlet temperature increases,the axial force shows a linear downward trend.When the inlet pressure increases,the axial force shows a linear increase trend.When the number of sealing teeth increases,the axial force of the impeller increases linearly and the leakage decreases gradually.When the sealing diameter increases,the axial force of the impeller first decreases to the equilibrium state,and then continues to increase in the opposite direction,and the leakage increases exponentially.
作者
张傲
刁安娜
申迎峰
迟志男
赵程杰
姚彦辰
Ao Zhang;An-na Diao;Ying-feng Shen;Zhi-nan Chi;Cheng-jie Zhao;Yan-chen Yao(Shanghai Marine Diesel Engine Research Institute)
出处
《风机技术》
2024年第5期19-24,共6页
Chinese Journal of Turbomachinery
基金
中国船舶集团有限公司第七一一研究所所发基金。
关键词
离心压缩机
半开式叶轮
泄漏通道
轴向力
CFD数值模拟
Centrifugal Compressor
Semi-open Impeller
Leakage Channel
Axial Force
CFD Numerical Simulation
