<p>Hot gas ingestion into the turbine wheel space of a gas turbine deteriorates mechanical properties and reduces the turbine’s life span, and therefore has to be prevented. Recent studies suggest that decreasing the swirl difference between the main and the rim seal flows can reduce ingress. To achieve this, inner stator swirlers have been used to increase swirl within the wheel space; however, their effectiveness diminishes toward the outer radii. Therefore, this study introduces a swirler mounted on the stator disk of the outer wheel space, designed to directly increase swirl at the outer radii. Compared with the baseline and inner stator swirler configurations, the proposed outer stator swirler not only enhances swirl at the outer radii but also improves sealing effectiveness across all radii.</p>