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• 数字化设计 • 上一篇    下一篇

三叶渐开线罗茨风机转子数值分析与优化

摘 要:为了获得三叶渐开线罗茨风机基圆半径变化对风机性能的影响关系,首#br# 先从几何原理角度,分析了渐开线基圆变化对风机转子啮合渐开线的影响,给出了符合啮合#br# 条件的渐开线基圆半径变化范围,及不同基圆半径对转子面积利用率系数的影响情况。在此#br# 基础上利用数值分析方法,对同种叶型不同基圆半径时的风机转子流场进行数值计算,运用#br# 动网格技术分析了风机内部的压力场、涡的强度变化和进气口质量流量变化情况。模拟结果#br# 表明:同种叶型渐开线基圆半径增加,能够削弱涡的强度和速度,增加进气口质量流量,提#br# 高风机效率,因此风机生产企业设计时应选择较大的渐开线基圆半径。#br# 关 键 词:数值分析;三叶罗茨风机;渐开线;动网格;基圆半径   

  • 出版日期:2015-04-30 发布日期:2015-03-30

Numerical Analysis and Optimization for Three-Lobe Involute Roots Blower

Abstract: In order to obtain the relationship between the changes of base circle radius on#br# three-lobe Roots blower and the blower performance, first the influence of blower rotor involutes#br# from the changes of base circle radius is analyzed from the perspective of geometric principles,#br# and the available range of involute base circle radius is given as well as its influence of area#br# utilization factor. Then based on the numerical analysis method, the blower internal pressure field,#br# the vortex intensity variation and the inlet mass flow rate changes under the same rotor type and#br# different base circle radius are calculated by the dynamic mesh technique. Simulation results show#br# that: the increase of the same kind of rotor type involute base circle radius can weaken the vortex#br# strength and speed, increase inlet mass flow, and improve efficiency of the Roots blower. The#br# blower manufacturer should therefore choose a larger involute base circle radius.#br# Key words: numerical analysis; three-lobe Roots blower; involute; dynamic mesh; base#br# circle radius   

  • Online:2015-04-30 Published:2015-03-30

摘要: 为了获得三叶渐开线罗茨风机基圆半径变化对风机性能的影响关系,首
先从几何原理角度,分析了渐开线基圆变化对风机转子啮合渐开线的影响,给出了符合啮合
条件的渐开线基圆半径变化范围,及不同基圆半径对转子面积利用率系数的影响情况。在此
基础上利用数值分析方法,对同种叶型不同基圆半径时的风机转子流场进行数值计算,运用
动网格技术分析了风机内部的压力场、涡的强度变化和进气口质量流量变化情况。模拟结果
表明:同种叶型渐开线基圆半径增加,能够削弱涡的强度和速度,增加进气口质量流量,提
高风机效率,因此风机生产企业设计时应选择较大的渐开线基圆半径。

关键词: 数值分析, 三叶罗茨风机, 渐开线, 动网格, 基圆半径

Abstract: In order to obtain the relationship between the changes of base circle radius on
three-lobe Roots blower and the blower performance, first the influence of blower rotor involutes
from the changes of base circle radius is analyzed from the perspective of geometric principles,
and the available range of involute base circle radius is given as well as its influence of area
utilization factor. Then based on the numerical analysis method, the blower internal pressure field,
the vortex intensity variation and the inlet mass flow rate changes under the same rotor type and
different base circle radius are calculated by the dynamic mesh technique. Simulation results show
that: the increase of the same kind of rotor type involute base circle radius can weaken the vortex
strength and speed, increase inlet mass flow, and improve efficiency of the Roots blower. The
blower manufacturer should therefore choose a larger involute base circle radius.

Key words: numerical analysis, three-lobe Roots blower, involute, dynamic mesh, base
circle radius