Aramid fiber brush seals are ultra-low leakage, compliant sealing elements for turbomachinery applications. Such seals are applicable in the Aviation, Energy, and Oil and Gas markets as either air-air seals or air-oil seals. In the present study, the influence of friction present between the front plate and upstream side of the bristle pack of an aramid fiber brush seal is experimentally investigated. With the bristle pack fully exposed on the upstream side of the seal, the bristles are shown to blow down and create a better seal compared to the same brush seal with a front plate installed.
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