Added Mass Effects on a Francis Turbine Runner with Attached Blade Cavitation
نویسندگان
چکیده
منابع مشابه
Added mass effects of attached cavitation on the blades of a Francis runner
Hydropower, a clean and renewable energy resource, has been developed worldwide for the economic development and improvement of people's living standards. It has also been used to improve the stability of the smart power grid. Depending on the water head of hydropower plants, various types of hydraulic turbines such as Francis, Kaplan and Pelton have been designed to maximize efficiency. Franci...
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The mechanical design of hydraulic turbines is conditioned by the dynamic response of the runner that is usually estimated by a computational model. Nevertheless, the runner has complex boundary conditions that are difficult to include in the computational model. One of these boundary conditions is the water in which the runner is submerged. The effect of the added mass and damping of water can...
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In this paper, a numerical simulation to analyze the influence of the surrounding water in a turbine runner has been carried out using finite element method (FEM). First, the sensitivity of the FEM model on the element shape and mesh density has been analysed. Secondly, with the optimized FEM model, the modal behaviour with the runner vibrating in air and in water has been calculated. The added...
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Nowadays, the challenge in hydraulic turbine design is the multi-objective design of turbine runner to reach higher efficiency. The hydraulic performance of a turbine is strictly depends on runner blades shape. The present paper focuses on the application of the multi-objective optimization algorithm to the design of a small Francis turbine runner. The optimization exercise focuses on the effic...
متن کاملA Fatigue Analysis of a Hydraulic Francis Turbine Runner
In this work, the estimation of crack initiation life of a hydraulic Francis turbine runner is presented. The life prediction is based on the local strain approach to predict the initiation life. First, the analysis is carried out in air and in water condition and the runner’s natural frequencies were calculated using the finite element (FE) method. The analysis in air is compared with experime...
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ژورنال
عنوان ژورنال: Fluids
سال: 2019
ISSN: 2311-5521
DOI: 10.3390/fluids4020107