东方电气评论
東方電氣評論
동방전기평론
2014年
4期
48-54
,共7页
有效厚度%刷式气封%流量系数%计算方法
有效厚度%刷式氣封%流量繫數%計算方法
유효후도%쇄식기봉%류량계수%계산방법
effective thickness%brush seal%flow factor%method of calculations
刷式气封具有良好的密封特性,被广泛应用在汽轮机和燃气轮机等工业动力装置中。刷式气封密封特性的计算是设计中一项重要工作。本文基于效厚度模型,发展了一种刷式气封流量系数的计算方法。近似认为刷丝呈均匀正方形交错排布,利用交错管束流动阻力系数的计算公式,参考文献中的实验结果建立有效厚度与压比关联式,基于MATLAB软件编写迭代程序,可以方便地计算刷式气封的流量系数。计算结果与试验数据对比,证明该方法预测刷式气封流量系数的可行性,为设计开发提供了一个思路。
刷式氣封具有良好的密封特性,被廣汎應用在汽輪機和燃氣輪機等工業動力裝置中。刷式氣封密封特性的計算是設計中一項重要工作。本文基于效厚度模型,髮展瞭一種刷式氣封流量繫數的計算方法。近似認為刷絲呈均勻正方形交錯排佈,利用交錯管束流動阻力繫數的計算公式,參攷文獻中的實驗結果建立有效厚度與壓比關聯式,基于MATLAB軟件編寫迭代程序,可以方便地計算刷式氣封的流量繫數。計算結果與試驗數據對比,證明該方法預測刷式氣封流量繫數的可行性,為設計開髮提供瞭一箇思路。
쇄식기봉구유량호적밀봉특성,피엄범응용재기륜궤화연기륜궤등공업동력장치중。쇄식기봉밀봉특성적계산시설계중일항중요공작。본문기우효후도모형,발전료일충쇄식기봉류량계수적계산방법。근사인위쇄사정균균정방형교착배포,이용교착관속류동조력계수적계산공식,삼고문헌중적실험결과건립유효후도여압비관련식,기우MATLAB연건편사질대정서,가이방편지계산쇄식기봉적류량계수。계산결과여시험수거대비,증명해방법예측쇄식기봉류량계수적가행성,위설계개발제공료일개사로。
Brush seals are widely applied on industrial steam turbines and gas turbines due to their good performances of sealing. A method of the calculating the flow factors for brush seals is developed based on the effective thickness. The bristles are treated as bundles of uniformly staggered circular tubes, whose leakage characteristics have been obtained by investigators. The effective thicknesses are correlated to the pressure drop referring to the experimental results of investigators, and the flow factors could be calculated by using MATLAB program. Comparisons of the calculation results with the experimental ones have shown the feasibilities of this method on practical design processes.