摘要
分析了分瓣式浮环密封流固热耦合理论,建立了有槽和无槽这3种结构分瓣式浮环密封流固热耦合数值求解模型,在验证数值方法准确性的基础上,研究了无浅槽、矩形槽和三角槽这3种结构的分瓣式浮环密封在高温高压气体耦合作用下随不同入口压力、温度和转速下的流场特性、力学特性以及泄漏特性。结果表明:3种浅槽结构的分瓣式浮环密封流固热耦合数值求解模型,可准确求解流场特性、力学特性和泄漏特性。流体在高速剪切力的作用下沿周向运动,由于挤压使浅槽结构产生局部高压区,形成动压效应;同一入口压力工况下,具有三角槽结构的分瓣式浮环密封开启力最大,入口压力为600 kPa时相比于无浅槽结构增加9.6%,且泄漏量保持相对较小;温度对浮环开启力影响很小,且温度越高泄漏量越小,最大减小6%;转速对矩形槽和三角槽结构浮环开启力影响较大,且最大增加3.2%,对闭合力和泄漏量影响很小。
The fluid-solid-thermal coupling theory of the split floating ring seal was analyzed,and a numerical solution model of fluid-solid-thermal coupling of split floating ring seals with/without grooves was established.On the basis of verifying the accuracy of the numerical method,the flow field characteristics,mechanical characteristics and leakage characteristics of the segmented floating ring seal without shallow groove,rectangular groove and triangular groove under the coupling effect of high temperature and high pressure with different inlet pressure,temperature and speed were studied.The results showed that the fluid-solid-thermal coupling numerical solution model of three kinds of shallow-groove structure floating ring seal can accurately solve the flow field characteristics,mechanical characteristics and leakage characteristics.The fluid moved along the circumferential direction under the action of high-speed shear force,and the local high-pressure zone was generated in the shallow groove structure due to extrusion,which formed the dynamic pressure effect.Under the same inlet pressure condition,the split floating ring seal with triangular groove structure had the largest opening force.When the inlet pressure was 600 kPa,it increased by 9.6%compared with the structure without shallow groove,and the leakage amount was kept relatively small.The temperature had little effect on the opening force of the floating ring,and the higher temperature indicated the smaller leakage amount,the maximum reduction was 6%.The rotating speed had a great influence on the opening force of the floating ring of rectangular groove and triangular groove structure,and the maximum increase was 3.2%,but had little influence on the closing force and leakage.
作者
任国哲
李延鹏
孙丹
赵欢
温帅方
王鑫宇
REN Guozhe;LI Yanpeng;SUN Dan;ZHAO Huan;WEN Shuaifang;WANG Xinyu(Liaoning Key Lab of Advanced Test Technology for Aerospace Propulsion System,School of Aero-engine,Shenyang Aerospace University,Shenyang 110136,China;Key Laboratory of Turbomachinery Advanced Seal Technology,Shenyang Aerospace University,Shenyang 110136,China)
出处
《航空动力学报》
北大核心
2025年第3期21-30,共10页
Journal of Aerospace Power
基金
国家自然科学基金(52075346)
中国航空发动机集团产学研合作项目(HFZL2021CXY012)
辽宁省自然科学基金(2022-MS-301)。
关键词
动压型分瓣式浮环密封
流固热耦合
泄漏特性
开启力
闭合力
dynamic pressure split floating ring seal
fluid-solid-thermal coupling
leakage characteristics
open force
closing force
