In this paper, a 2-D staggered tube bank of bristle pack is established to examine the effect of flow on bristle pack, and Gambit is used to generate the mesh. The Resistance of the bristle in the transient condition is analyzed using simulation with Fluent. The resistance of the brush seal includes friction drag, pressure drag, and interference drag. Results show that the pressure drag plays the leading role owing to the shape of the bristle, and pressure drag increases slowly in the axial direction but increases significantly in the end row. The drag grows gradually with increasing pressure. The results also show that when the value of bristles gap decreases, the drags in the front rows increases more slowly but decrease significantly in the end row.
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