| Citation: | LI Genhong, MA Yingqun, WANG Xinggao, et al. Brush seal porous media model based on test corrections of differential pressure-brush wire thickness[J]. Journal of Aerospace Power, 2024, 39（12）：20220989 doi: 10.13224/j.cnki.jasp.20220989
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A steady-state clip type three-dimensional solid model of the three-stage brush seal and a porous media model of the single-stage brush seal and three-stage brush seal based on the test data modification were established, a brush seal leakage medium-speed durable characteristic experiment device was designed and built, the influence of pressure drop on leakage characteristics of single-stage and three-stage brush seals was studied, and the advantages and disadvantages of the two numerical methods were analyzed and compared. The modified porous media model was used to study the flow field characteristics of the three-stage brush seal, and the axial and radial pressure distribution characteristics inside the brush bundle were analyzed. The results showed that the porous media model modified based on experimental data had higher solution accuracy than the steady-state three-dimensional forked tube bundle model and was closer to the experimental results, the error between the corrected values and the test results of single-stage and three-stage porous media models was less than 5% and 20%, respectively, which was in good agreement with the experimental results. There were large axial and radial pressure gradients in the height and surrounding area of the brush wire bundle fence, and good sealing effect was achieved through the flow resistance effect.
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