Experimental and Numerical Investigation of High Load Turbine Blade Tip Cavity Structures

Chen, Ying‐Jie; Jiang, Dengyu; Du, Zhengshuai; Wang, Songtao

doi:10.1115/1.4056512

Cited by 10 publications

(1 citation statement)

References 21 publications

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“…Chen [12] investigated the aerodynamic performance of three different cavity tip configurations through wind tunnel experiments, including inline squealer, cavity winglet tip and dual−cavity combined winglet tip configurations. Finally, it was found that the dual−cavity combined winglet tip had the best aerodynamic performance, optimizing the aerodynamic performance by 4% compared to the inline squealer structure, while the cavity winglet tip carried out an optimization of 1%.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigations for Dual−Cavity Tip Aerodynamic Performance in the Linear Turbine Cascade

et al. 2023

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Experimental and numerical studies of a linear high-loaded turbine cascade with a dual−cavity tip structure are presented in this paper. The experimental conditions contained an increase in the outlet Mach number from 0.42 to 0.92, a change in the incidence angle from −15° to 15° and an increase in the relative clearance size from 0.36% to 1.4%. The ability of the dual−cavity tip to control leakage losses and vortices is assessed using the total pressure coefficient and the Q-criterion. This research indicates that the leakage vortex interacts strongly with the passage vortex, and the change in working conditions affects the balance between the two vortices and thus the flow field structure. The experimental and numerical results prove that the dual−cavity tip can reduce losses in all operating conditions, with the best control effect reduced by 0.025 in a large clearance size condition. In addition, the leakage control effect of the blade tip structure is more influenced by the incoming flow angle and clearance size than the Mach number.

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Section: Introductionmentioning

confidence: 99%