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《Journal of Shenyang Aerospace University》 2016-01
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CFD numerical analysis of influence factors of seal rotordynamic characteristics

SUN Dan;WANG Shuang;AI Yan-ting;WANG Ke-ming;HU Guang-yang;LIU Ning-ning;Faculty of Aerospace Engineering,Shenyang Aerospace University;Liaoning Key Lab of Advanced Test Technology for Aerospace Propulsion System;The 5thResearch Department,AVIC Shenyang Engine Design and Research Institute;  
The Moving Reference Frame technology was studied in the paper by transforming unsteady flowinto steady one using Moving Reference Frame method. The rotordynamic characteristics of labyrinth seal models were set up to evaluate the seal rotordynamic characteristics and flowfield characteristics. The seal rotordynamic characteristics and whirl coefficients under different pressure ratios,rotational speeds,and prerotation conditions were evaluated to study the influence factors of seal rotordynamic characteristics,and the influence factors of exciting force produced by seal air flowwere further analyzed on the basis of numerical calculations. The results,which are unfavorable for the stability of the rotor,showthat with the increase of the inlet pressure and rotational speed,the cross stiffness coefficient k increases,the direct damping C decreases,and the whirl coefficient increases,and the seal fluid circumferential flowis the main cause of the seal airflowexciting force.
【Fund】: 国家自然科学基金(项目编号:11302133);; 航空科学基金(项目编号:20140454003);; 辽宁省自然科学基金(项目编号:2015020113)
【CateGory Index】: V231
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1 SUN Dan;WANG Shuang;AI Yanting;WANG Keming;XIAO Zhonghui;LI Yun;Liaoning Key Laboratory of Advanced Test Technology for Aerospace Propulsion System,Shenyang Aerospace University;Shenyang Blower Works Group Co.,Ltd.;;Numerical and experimental research on performance of swirl brakes for the static and dynamic characteristics of seals[J];Acta Aeronautica Et Astronautica Sinica;2015-09
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