فناوری در مهندسی هوافضا

فناوری در مهندسی هوافضا

Analysis Behavior of Partial Admission Hydrodynamic Turbines in Tri-Channelized Systems

نوع مقاله : علمی پژوهشی

نویسندگان
1 دانشکدگان علوم و فناوری های میان رشته ای. دانشگاه تهران. تهران. ایران
2 دانشکدگان علوم و فناوری های میان رشته ای، دانشگاه تهران، تهران، ایران
چکیده
Partial admission turbines typically operate to counteract fluctuations while maintaining high efficiency. However, partial admission itself leads to losses that depend on various parameters, including turbine geometry, which significantly affects flow distribution at the rotor’s inlet and outlet. In this paper, the aerodynamic behavior of a partial admission axial-flow turbine was numerically simulated using Ansys Fluent software under steady-state and incompressible flow conditions. The turbine consisted of three channels, each containing six Eppler 817 blades, carefully designed to optimize aerodynamic performance. This specific blade arrangement ensures enhanced interaction between the flow and the blade surfaces, promoting more accurate prediction of aerodynamic forces. By analyzing the hydrodynamic forces applied to the blades, including detailed pressure and lift distributions along the blade span, it was observed that the pressure difference between the first and third channels increased by 25.19%, while the lift force decreased by 34%. These variations demonstrate consistent and physically reasonable flow behavior across the channels. Therefore, the configuration of three channels with six blades per channel provides acceptable and stable results in terms of hydrodynamic force balance, flow uniformity, and overall aerodynamic efficiency, confirming the suitability of the chosen geometry for partial admission turbine design in practical engineering applications. These findings clearly indicate that the analyzed turbine configuration not only ensures stable and uniform flow but also provides a reliable and efficient solution for practical partial admission turbine applications.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Analysis Behavior of Partial Admission Hydrodynamic Turbines in Tri-Channelized Systems

نویسندگان English

Shahriyar Payvar 1
Shahrokh Shams 2
1 Faculty of New Science and Technology, University of Tehran, TehranT Iran
2 Faculty of New Science and Technology, University of Tehran, TehranT Iran
چکیده English

Partial admission turbines typically operate to counteract fluctuations while maintaining high efficiency. However, partial admission itself leads to losses that depend on various parameters, including turbine geometry, which significantly affects flow distribution at the rotor’s inlet and outlet. In this paper, the aerodynamic behavior of a partial admission axial-flow turbine was numerically simulated using Ansys Fluent software under steady-state and incompressible flow conditions. The turbine consisted of three channels, each containing six Eppler 817 blades, carefully designed to optimize aerodynamic performance. This specific blade arrangement ensures enhanced interaction between the flow and the blade surfaces, promoting more accurate prediction of aerodynamic forces. By analyzing the hydrodynamic forces applied to the blades, including detailed pressure and lift distributions along the blade span, it was observed that the pressure difference between the first and third channels increased by 25.19%, while the lift force decreased by 34%. These variations demonstrate consistent and physically reasonable flow behavior across the channels. Therefore, the configuration of three channels with six blades per channel provides acceptable and stable results in terms of hydrodynamic force balance, flow uniformity, and overall aerodynamic efficiency, confirming the suitability of the chosen geometry for partial admission turbine design in practical engineering applications. These findings clearly indicate that the analyzed turbine configuration not only ensures stable and uniform flow but also provides a reliable and efficient solution for practical partial admission turbine applications.

کلیدواژه‌ها English

Partial Admission Turbine Design
Computational Fluid Dynamics
steady Flow
Turbulence Model
Two-Dimensional Numerical Analysis

مقالات آماده انتشار، پذیرفته شده
انتشار آنلاین از 11 آذر 1404

  • تاریخ دریافت 31 شهریور 1404
  • تاریخ بازنگری 26 آبان 1404
  • تاریخ پذیرش 08 آذر 1404
  • تاریخ اولین انتشار 11 آذر 1404