The dry gas seal is a promising sealing technology to control the leakage flow through the clearance between the stationary and rotational components of Supercritical Carbon Dioxide (SCO~2~) turbomachinery. The dry gas seal is firstly designed for the SCO~2~ compressor shaft end of the GE's 450MWe Brighton cycle power generation system. Then the effects of the spiral angle and gas film thickness on the designed dry gas seal performance is numerically investigated using the three-dimensional Reynolds-Averaged Navier-Stokes (RANS) and SST turbulence model. The accuracy of the numerical method is validated by comparison of the experimental data. The leakage flow rate, opening force, stiffness and opening force leakage ratio of the designed dry gas seal for SCO~2~ compressor shaft end at five gas film thicknesses and four spiral angles is analyzed. The obtained results show that the designed dry gas seal meets the requirement of the leakage flow rate of the SCO~2~ compressor shaft end. The dry gas seal with a spiral angle of 15° is the best solution due to its small leakage rate and its’ best comprehensive sealing performance. On some occasions where high stability is required, the dry gas seal with a spiral angle of 30° can be selected for its’ highest film stiffness. The present work provide the reference of the dry gas seal design for the SCO~2~ compressor shaft end leakage flow suppression.


Design and Investigations on Dry Gas Seal of the Shaft End for 450MWe Supercritical Carbon Dioxide Compressor

Division / Sponsor:
International Gas Turbine Institute (IGTI)

Paper Proceedings: https://asmedigitalcollection.asme.org/GT/GT2020/volume/84058

Turbo Expo - Virtual Conference

Supporting the need among researchers worldwide for additional online and multimedia content, ASME now offers the ASME Conference Video Collection. This platform will collect and provide long-term access to conference presentation videos, encompassing all technology areas within ASME's technical conference and events program. About 30,000-40,000 engineers across all mechanical engineering and related disciplines participate in ASME conferences each year. This includes authors of approximately 6,000 to 8,000 technical papers published by ASME, the majority of whom also submit video presentations for our virtual conferences. The video collection will be available as an add-on to existing product packages or as a separate subscription.