摘要
考虑温度的影响,建立浮环密封力学特性流固热耦合数值求解模型,在验证计算方法准确性的基础上,研究浮环密封的流场特性,以及石墨烯、石墨、铝合金以及碳化硅4种材料的浮环密封在不同进口压力、温度时的力学特性。结果表明:浮环密封在偏心时,由于楔形间隙的存在,气流经过这种结构产生流体动压效应,在较薄的流体域一侧形成局部高压区,较厚的一侧压力无明显变化,而温度沿轴向方向逐级升高,且偏心率越大,偏心位置的温度越大;浮环密封流体域温度随着进口压力的升高而降低,因温度影响材料的属性,使得不同材料的浮环密封结构对温度会很敏感;不同材料浮环密封的变形量随进口压力的增加而减小,应变也随着进口压力的增加而减小;4种材料浮环密封的变形量与应力均随着进口温度的增加而增大。
Considering the influence of temperature,the fluid-solid thermal coupling numerical solution model of mechanical characteristics of floating ring seal was established,and the accuracy of the calculation method was verified.The flow field characteristics of the floating ring seal,and the mechanical properties of four floating ring seals made of graphene,graphite,aluminum and silicon carbide under different inlet pressure and temperature were studied.The results show that when the floating ring seal is eccentric,due to the existence of wedge clearance,the flow through the structure produces fluid dynamic pressure effect,forming a local high pressure area on the thin side of the fluid domain,the pressure on the thick side of the fluid domain does not change significantly.However,the temperature increases along the axial direction,and the greater the eccentricity,the greater the temperature at the eccentric position.The temperature of floating ring seal fluid domain decreases with the increase of inlet pressure.Because temperature affects the properties of materials,the floating ring seal structures of different materials are very sensitive to temperature.The deformation of floating ring seal of different materials decreases with the increase of inlet pressure,and the strain also decreases with the increase of inlet pressure.The deformation and stress of the four floating ring seals increase with the increase of inlet temperature.
作者
姜金裕
孙丹
赵欢
王双
胡海涛
常城
JIANG Jinyu;SUN Dan;ZHAO Huan;WANG Shuang;HU Haitao;CHANG Cheng(Liaoning Key Lab of Advanced Test Technology for Aerospace Propulsion System,School of Aero-engine,Shenyang Aerospace University,Shenyang Liaoning 110136,China;AECC Sichuan Gas Turbine Research Institute,Chengdu Sichuan 610599,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2023年第4期30-39,共10页
Lubrication Engineering
基金
国家自然科学基金项目(52075346)
辽宁省“兴辽英才计划”项目(XLYC2007077)
先进航空动力创新工作站(依托中国航空发动机研究院设立)项目(HKC2020-02-030)。
关键词
浮环密封
流固热耦合
密封材料
泄漏特性
力学特性
floating ring seal
fluid-solid thermal coupling
sealing material
leakage characteristics
mechanical properties
