Computations on the flow characteristics and sealing performance of a stator well cavity for the second stage in gas turbine

To investigate the downstream rim seal gas ingestion characteristics of a 1.5-stage turbine, the URANS equations were solved numerically using the SST turbulence model. The effects of different purge flow rates and the second vane on the ingestion characteristics of the aft cavity and the nonuniform fluctuations of the main gas path pressure are analysed. The results showed that the aft cavity is affected by the combined effects of the blade and the second vane, and the potential field at the leading edge of the second vane greatly influence the airflow variation in the aft cavity, which enhances the ingress of the mainstream into the wheel-space. The front purge flow weakens the egress between the suction side of the blade and the suction side of the second vane. The potential field at the leading edge of the second vane suppresses the nonuniform distribution of airflow in the aft cavity caused by the rotational effect of the blade.

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Computations on the flow characteristics and sealing performance of a stator well cavity for the second stage in gas turbine

Cited by 2 publications

References 25 publications

Numerical investigation on the effect of hot running rim seal clearance on hot gas ingestion into rotor-stator system

Numerical investigation on the effect of hot running rim seal clearance on hot gas ingestion into rotor-stator system

Unsteady numerical investigation on gas ingestion into the rotor-stator disk cavities of a 1.5-stage turbine

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