The Effect of Blade Angle Deviation on Mixed Inflow Turbine Performances
The choice of blades for mixed turbines is to achieve the required deflection with minimal losses. In addition, it is necessary that the blade functions without a detachment in a wide area outside the nominal operating point of the machine. In the blade profile study, it is required to satisfy the c...
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| Format: | Article |
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MDPI AG
2022-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/8/3781 |
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| author | Mohammed Amine Chelabi Milan Saga Ivan Kuric Yevheniia Basova Sergey Dobrotvorskiy Vitalii Ivanov Ivan Pavlenko |
| author_facet | Mohammed Amine Chelabi Milan Saga Ivan Kuric Yevheniia Basova Sergey Dobrotvorskiy Vitalii Ivanov Ivan Pavlenko |
| author_sort | Mohammed Amine Chelabi |
| collection | DOAJ |
| description | The choice of blades for mixed turbines is to achieve the required deflection with minimal losses. In addition, it is necessary that the blade functions without a detachment in a wide area outside the nominal operating point of the machine. In the blade profile study, it is required to satisfy the conditions relating to fluid mechanics and those relating to the possibility of realization of construction. The work carried out presents the effect of the blade deviation angle on the geometric blade shape and the performance of the mixed inflow turbine on keeping the same rotor casing in order to improve its performances. It was remarked that the efficiency is proportional to the deviation angle’s increase, but the rotor became heavy. It has been determined that the effect of the blade deviation angle on mixed inflow performances decreases dramatically starting from the angle −20° for a 100% of machine load. It was urged to avoid relying on angles greater than −20 as values for blade deviation angles. The study noted that the maximum obtained in the output work and power is related to the highest the efficiency for a specific optimum design case (−35° of deviation blade angle) due to the increase in the contact surface between the blade and the fluid, but the problem is that the rotor gets a little heavy (4.37% weight gain). Among recommendations, attention was given to the more significant absolute exit kinetic energies, for values of deviation blade angle between -10° and −20°, where an exhaust diffuser is recommended to use to recover a part of it into a greater expansion ratio. These simulation results were obtained using a CFD calculation code-named CFX.15. This code allowed for the resolution of the averaged dynamic equations governing the stationary, compressible, and viscous internal flow. |
| first_indexed | 2024-03-09T11:12:43Z |
| format | Article |
| id | doaj.art-25b7d34473ee49ccbc99665c4f43e22c |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T11:12:43Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-25b7d34473ee49ccbc99665c4f43e22c2023-12-01T00:38:35ZengMDPI AGApplied Sciences2076-34172022-04-01128378110.3390/app12083781The Effect of Blade Angle Deviation on Mixed Inflow Turbine PerformancesMohammed Amine Chelabi0Milan Saga1Ivan Kuric2Yevheniia Basova3Sergey Dobrotvorskiy4Vitalii Ivanov5Ivan Pavlenko6FERTIAL SPA Company, Industrial Zone SPA BP 40, Arzew 31200, AlgeriaDepartment of Applied Mechanics, University of Zilina, 8215/1, Univerzitna Str., 010 26 Zilina, SlovakiaDepartment of Automation and Production Systems, University of Zilina, 8215/1, Univerzitna Str., 010 26 Zilina, SlovakiaDepartment of Mechanical Engineering Technology and Metal-Cutting Machines, National Technical University “Kharkiv Polytechnic Institute”, 2, Kyrpychova Str., 61002 Kharkiv, UkraineDepartment of Mechanical Engineering Technology and Metal-Cutting Machines, National Technical University “Kharkiv Polytechnic Institute”, 2, Kyrpychova Str., 61002 Kharkiv, UkraineDepartment of Manufacturing Engineering, Machines and Tools, Sumy State University, 2, Rymskogo-Korsakova Str., 40007 Sumy, UkraineDepartment of Computational Mechanics Named after Volodymyr Martsynkovskyy, Sumy State University, 2, Rymskogo-Korsakova Str., 40007 Sumy, UkraineThe choice of blades for mixed turbines is to achieve the required deflection with minimal losses. In addition, it is necessary that the blade functions without a detachment in a wide area outside the nominal operating point of the machine. In the blade profile study, it is required to satisfy the conditions relating to fluid mechanics and those relating to the possibility of realization of construction. The work carried out presents the effect of the blade deviation angle on the geometric blade shape and the performance of the mixed inflow turbine on keeping the same rotor casing in order to improve its performances. It was remarked that the efficiency is proportional to the deviation angle’s increase, but the rotor became heavy. It has been determined that the effect of the blade deviation angle on mixed inflow performances decreases dramatically starting from the angle −20° for a 100% of machine load. It was urged to avoid relying on angles greater than −20 as values for blade deviation angles. The study noted that the maximum obtained in the output work and power is related to the highest the efficiency for a specific optimum design case (−35° of deviation blade angle) due to the increase in the contact surface between the blade and the fluid, but the problem is that the rotor gets a little heavy (4.37% weight gain). Among recommendations, attention was given to the more significant absolute exit kinetic energies, for values of deviation blade angle between -10° and −20°, where an exhaust diffuser is recommended to use to recover a part of it into a greater expansion ratio. These simulation results were obtained using a CFD calculation code-named CFX.15. This code allowed for the resolution of the averaged dynamic equations governing the stationary, compressible, and viscous internal flow.https://www.mdpi.com/2076-3417/12/8/3781energy efficiencyindustrial growthmixed turbinebladehubshroud |
| spellingShingle | Mohammed Amine Chelabi Milan Saga Ivan Kuric Yevheniia Basova Sergey Dobrotvorskiy Vitalii Ivanov Ivan Pavlenko The Effect of Blade Angle Deviation on Mixed Inflow Turbine Performances Applied Sciences energy efficiency industrial growth mixed turbine blade hub shroud |
| title | The Effect of Blade Angle Deviation on Mixed Inflow Turbine Performances |
| title_full | The Effect of Blade Angle Deviation on Mixed Inflow Turbine Performances |
| title_fullStr | The Effect of Blade Angle Deviation on Mixed Inflow Turbine Performances |
| title_full_unstemmed | The Effect of Blade Angle Deviation on Mixed Inflow Turbine Performances |
| title_short | The Effect of Blade Angle Deviation on Mixed Inflow Turbine Performances |
| title_sort | effect of blade angle deviation on mixed inflow turbine performances |
| topic | energy efficiency industrial growth mixed turbine blade hub shroud |
| url | https://www.mdpi.com/2076-3417/12/8/3781 |
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