为了研究靴部结构对气动性能的影响，分别建立了光滑、局部开槽、轴向收敛三种指尖密封模型，并对其进行双向流固耦合数值模拟。通过计算，获得了指尖密封的变形规律、泄漏量变化以及指尖靴间隙内流场的运动特性。与普通指尖密封结构相比，对密封靴部进行改进可较大程度地提高密封的性能。根据对泄漏及流场运动特性的分析，初步揭示了指尖密封的泄漏机理，同时阐述了开槽结构影响密封性能的根本原因。
For research the effect of aerodynamic performance by pad structure, the smooth, partial grooving and axial convergence structures are used in this paper as finger seal model for two-way fluid-solid interaction. By computation, the deformation law, leakage change and flow characteristics are obtained. Compare with common structure of finger seal, the grooving structure can improve sealing performance greatly. According to the analysis of leakage and flow characteristics, the authors reveal the leak mechanisms of finger seal. Meanwhile, the basic reason of sealing performance improvement causing by groove structure is described in this paper.
参考文献
| [1] | 李国见,李建华,陈国定,苏华.动压型指尖密封泄漏特性的分析[J].科学技术与工程,2007(13):3157-3159. |
| [2] | 雷艳妮,陈国定.基于动力学模型的指尖密封迟滞特性[J].机械工程学报,2007(05):122-126. |
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