西安交通大学能源与动力工程学院,西安,710049
网络首发:2010-11-10,
纸质出版:2010
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徐立群, 王志恒, 席光. 迷宫密封泄漏对小流量离心叶轮气动性能影响的研究[J]. 西安交通大学学报, 2010,44(11):23-27.
Numerical Study on Effect of Seal Leakage on Performance of Centrifugal Impeller with Low Flow Coefficient[J]. 2010, 44(11): 23-27.
在考虑密封泄漏损失的情况下
对小流量二氧化碳离心叶轮进行了三维黏性计算流体动力学分析
对比了考虑密封泄漏前后的计算结果.在设计工况下
叶轮等熵效率下降了8.1%
表明对小流量离心压缩机性能及主流流动结构进行准确的数值预测
必须考虑密封泄漏.为了揭示密封泄漏对离心叶轮性能的影响
通过改变迷宫密封的间隙得到了不同的密封结构
并在设计工况、小流量工况和大流量工况下分别进行了数值分析.结果表明
在一定流量工况下
随着密封间隙的增大
密封泄漏损失系数近似线性增大
离心叶轮等熵效率随之近似线性地下降.
The analysis with the three-dimensional viscous computational fluid dynamics(CFD)was carried out for a carbon dioxide centrifugal impeller with a low flow coefficient. The results show that the impeller isentropic efficiency decreases by 8.1 percent at the design mass flow rate with the consideration of the seal leakage compared with that without the consideration of the seal leakage. It is suggested that the seal leakage should be considered in the numerical simulation to predict accurately the performance and the flow in impellers with a low flow coefficient. In order to explore the effect of the seal leakage on the performance of the impeller
the seal clearance was changed and the numerical simulation was performed on the centrifugal impeller with different seal configurations at the low and high mass flow rates as well as the design mass flow rate
respectively. Our results indicate that
at a given mass flow rate
the seal leakage loss coefficient increases and the impeller isentropic efficiency decreases almost linearly with the increase in the seal clearance.
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刷式密封刷丝束与转子接触力的数值研究. 西安交通大学学报,2010,44(7):23-27.
迷宫密封泄漏特性影响因素的研究. 西安交通大学学报,2010,44(3):16-20.
Bulk Flow方法分析孔型密封转子动力特性的有效性. 西安交通大学学报,2009,43(1):24-28.
蜂窝面迷宫密封内流动和总温升特性的研究. 西安交通大学学报, 2008,42(7):823-827.
基于多孔介质模型的刷式密封泄漏流动特性研究. 西安交通大学学报, 2007,41(7):768-771.
采用遗传算法的离心叶轮多目标自动优化设计. 西安交通大学学报,2010,44(1):31-35.
带分流叶片离心叶轮非定常流场的实验研究. 西安交通大学学报, 2009,43(9):14-18.
前向离心风机蜗壳出口结构的数值优化. 西安交通大学学报,2009,43(5):61-65.
轮盖开孔的离心风机流场研究. 西安交通大学学报,2008,42(9):1117-1121.
叶顶形状对动叶顶部流动和传热的影响研究. 西安交通大学学报,2008,42(5):537-541.
CO2滑片膨胀机热力过程的试验研究. 西安交通大学学报,2008,42(3):313-317.
单螺杆压缩机齿型的多圆柱包络原理. 西安交通大学学报,2007,41(11):1271-1274.
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