Abstract
Non-contacting seal is used to prevent leakage flow for turbomachineries, such as gas turbines and compressors. Since these turbomachineries tend to be operated under high pressure and power, the fluid forces induced at the seal is one of the causes of instability. One way to reduce this instability is to use inlet swirl injection against rotation. In this research, we found the distribution of circumferential velocity and pressure at the inlet of the seal and the effect of injection of inlet swirl on the static and dynamic characteristics.
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