Abstract
The exhaust diffuser of a gas turbine is an important element affecting the aerodynamic efficiency of both the turbine itself and the entire turbine plant. This article presents the results of work on designing and commissioning an experimental static stand, which is an air subsonic wind tunnel of constant action, 700 mm in diameter, having an open connection to the atmosphere. The plant is designed for a comprehensive study of affecting the geometric parameters of annular diffusers, the regime parameters of the working fluid, the initial unevenness of the incoming flow (flow swirl, leakage through the radial clearance) the aerodynamic efficiency of the diffusers. The experimental stand is equipped with a modern set of measuring and recording equipment, which allows obtaining the maximum information content of research. The first stage of the work was devoted to develo** and presenting the influence of geometric and regime parameters on the static stand. The second stage of the work was dedicated to carrying out experimental studies of the leakage effect in the radial clearance above the impeller on the diffuser aerodynamic efficiency. The presented studies were fulfilled on the models of equivalent diffusers, which are the most common in modern turbine machine building. The designed and manufactured stand, the conducted experimental studies meet the modelling requirements.
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Tikhonovskiy, V.I., Gorbachev, V.V., Osipov, A.V. (2023). Multifunctional Aerodynamic Plant for Experimental Static Studies of Turbomachine Annular Diffusers. In: Radionov, A.A., Gasiyarov, V.R. (eds) Proceedings of the 8th International Conference on Industrial Engineering. ICIE 2022. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-031-14125-6_10
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