Turbine rim seal ingress mitigation in a supercritical CO2 environment via 2D CFD-based parametric design

Q: What does this research mean for the field?

Optimized rim seal geometries can reduce required purge mass flow by 22.3% in supercritical CO2 turbines, and higher 2D rim seal pressure drop serves as a reliable indicator of higher 3D sealing effectiveness. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

A. Rebassa; L. Tuite; G. Paniagua

doi:10.1016/j.ijheatfluidflow.2026.110461

May 27, 2026International Journal of Heat and Fluid FlowOpen Access

Turbine rim seal ingress mitigation in a supercritical CO2 environment via 2D CFD-based parametric design

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Key Points

The aim is to evaluate rim seal geometries to mitigate ingress in supercritical CO2 turbines.
Evaluated 283 rim seal geometries using a parametric 2D RANS framework.
Assessed four rim seals with 3D URANS to quantify sealing effectiveness.
Analyzed the required purge mass flow reduction in selected geometries.
Selected geometries reduced required purge mass flow by 22.3%.
Higher 2D rim seal pressure drop correlated with increased 3D sealing effectiveness.
Identified the blade tip as the highest-risk region for cooling.

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Implication

Evaluates rim seal designs for sCO2 turbines, suggesting effective cooling solutions.

Abstract

• Parametric 2D RANS framework evaluates 283 rim seal geometries for sCO2 turbines. • Four rim seals assessed via 3D URANS to quantify sealing effectiveness. • Selected geometries reduce required purge mass flow by 22.3%. • Higher 2D rim seal pressure drop indicates higher 3D sealing effectiveness. • sCO2 boosts cavity/platform cooling while the blade tip is the highest-risk region.

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Rebassa et al. (2026) studied this question.

synapsesocial.com/papers/6a1a7ecb0307b7850943159f https://doi.org/10.1016/j.ijheatfluidflow.2026.110461

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Turbine rim seal ingress mitigation in a supercritical CO2 environment via 2D CFD-based parametric design

Key Points

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Cite This Study

Turbine rim seal ingress mitigation in a supercritical CO2 environment via 2D CFD-based parametric design

Key Points

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

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