气旋转接头缝隙泄漏流动参数敏感性分析  

Sensitivity analysis of flow parameters of air rotary joint gap leakage

作　　者：周婕群 冯高鹏[1] 李锋[1] 梁斌[1] 拜云山 

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621999

出　　处：《现代机械》2017年第2期14-18,共5页Modern Machinery

摘　　要：缝隙泄漏是影响非接触密封型气旋转接头性能的一个重要因素,研究其泄漏流动特性对气旋转接头设计具有重要意义。根据非接触密封型气旋转接头结构原理,将环形缝隙泄漏流动合理简化为二维等截面直管流动,采用正交试验设计原理,通过数值模拟分析了气旋转接头泄漏流动气体参数变化规律;以工程上最为关注的最低气体温度和泄漏流量为评估指标,分析了气体工质压力、泄漏间隙结构参数对缝隙泄漏的影响。研究结果表明,经缝隙泄漏气体产生膨胀,气体压力、马赫数和温度沿流动方向的变化规律因气体工质压力不同而不同。影响最低温度的主要因素是气体工质压力,次要因素是泄漏间隙结构参数;当气体工质压力越大,泄漏间隙越宽、越短时,最低温度越小,泄漏流量越大。Gap leakage is an important factor that affects the performance of non-contact seal air rotary joint. According to the structure and principle of non-contact seal air rotary joint,the annular gap leakage flow was simplified to a two-dimensional uniform straight flow. The flow parameters variation of gas leakage of air rotary joint was analyzed through numerical simulation,using orthogonal test principle. Taking the lowest temperature and the leakage flow of the gas as evaluation indicators,analyze the influence of gas pressure,leakage gap structure parameters on gap leakage. The results showed that the variation of the gas pressure,the Maher number and the temperature along the flow direction is different because of the difference of the gas working pressure. The main factor affecting the lowest temperature is the gas working pressure,the secondary factor is structure parameters of the leakage gap. The bigger gas working pressure and wider and shorter leakage gap,the lower temperature is,the greater the leakage flow is.

关 键 词：气旋转接头 缝隙泄漏 正交设计 评估指标 数值模拟 

分 类 号：TJ05[兵器科学与技术—兵器发射理论与技术]