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Numerical predictions of the flow and temperature distributions in a three-dimensional brush seal model
Shouqing HUANG,Shuangfu SUO,Yongjian LI,Xinmin GU,Yuming WANG
Journal of Tsinghua University(Science and Technology) ›› 2014, Vol. 54 ›› Issue (6) : 805-810.
PDF(2322 KB)
PDF(2322 KB)
Numerical predictions of the flow and temperature distributions in a three-dimensional brush seal model
The flow and temperature distributions in a brush seal are predicted using a three-dimensional computational fluid dynamics (CFD) model with software ANSYS. The results show the effect of the number of bristles rows on the leakage and the flow and temperature distributions in the brush seal (14 rows, 0.93 mm thick). The results relate the characteristics of the flow and temperature distributions around the bristles to the clearances between bristles and the influence of various operating parameters (pressure differential, interference, linear speed) on the maximum temperature. Results show that as the bristle row number increases, the leakage first decreases exponentially, then decreases linearly and slowly, and tends to a stable value in the end. The effects of interference and linear speed on the maximum temperature are more obvious.
brush seal / flow distribution / temperature distribution / three-dimensional model / operation-parameter
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