液體平軸封與氣體迷宮式軸封之參數修正

Parameter Modification for Liquid Plain Seals and Gas Labyrinth Seals

葉俊廷(Chun-Ting Yeh)

指導教授 ： 楊大中

元智大學/工程學院/機械工程學系/碩士(2008年)

https://doi.org/10.6838/YZU.2008.00172

摘要

本文利用Childs以bulk flow理論推導的液體平軸封與氣體迷宮式軸封之動態係數方程式為基礎，針對經驗參數m、n進行修正。
以Fluent結果作為基準，利用最小平方法得到m、n為入出口壓差的函數，不再拘束於單一定值。修正後的計算值更加接近Fluent的分析結果，讓使用者僅需具備Matlab的使用能力就能求得更為精準的分析結果，大量節省計算時間與快速應用。

關鍵字

軸封 ； 動態係數 ； 整體流 ； 流體計算動力學

並列摘要

The empirical parameters, (m, n), in the Childs’ equations for the dynamic coefficients of liquid plain seals and gas labyrinth seals, based on bulk flow theory, are modified in this paper. Instead of treating the parameters (m, n) as constant values, optimal functions of pressure difference for the parameters (m, n) are obtained by least square error fitting to approach the target values computed from Fluent. The accuracy of the dynamic coefficients of seals is improved and closer to the results of Fluent, which help the user saving computational time and fast implementation in applications.

並列關鍵字

seal ； dynamic coefficient ； bulk flow ； computational fluid dynamics

參考文獻

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