The Experts below are selected from a list of 2073 Experts worldwide ranked by ideXlab platform

Danmei Xie - One of the best experts on this subject based on the ideXlab platform.

  • The Effect of Suction Side Tubercles on Torque Output of a Steam Turbine Low-Pressure Last Stage Blade
    Energies, 2020
    Co-Authors: Jing Zhang, Chun Wang, Ziyue Mei, An Han, Danmei Xie
    Abstract:

    Flow separation and different kinds of stall flows occur under low load conditions for steam turbine last Stage Blades. In order to delay the flow separation and increase turbine power production, we applied suction side tubercles on steam turbine low-pressure last Stage Blades in the present study. The amplitude, wavelength, position, and thickness were considered as our design variables. We used the orthogonal test method (OTM) to generate modified Blades with different tubercle variables that were then numerically simulated by a three-dimensional computational fluid dynamics (CFD) analysis. The Blade axial torque of the nine modified tests was compared with the original Blade. The results showed that the application of bionic tubercles on the suction side of the steam turbine Blade is a promising solution to improve the Blade axial torque for all modified tests with a maximum increase of 33.32% due to the turbulent vortices generated by bionic tubercles.

Jing Zhang - One of the best experts on this subject based on the ideXlab platform.

  • The Effect of Suction Side Tubercles on Torque Output of a Steam Turbine Low-Pressure Last Stage Blade
    Energies, 2020
    Co-Authors: Jing Zhang, Chun Wang, Ziyue Mei, An Han, Danmei Xie
    Abstract:

    Flow separation and different kinds of stall flows occur under low load conditions for steam turbine last Stage Blades. In order to delay the flow separation and increase turbine power production, we applied suction side tubercles on steam turbine low-pressure last Stage Blades in the present study. The amplitude, wavelength, position, and thickness were considered as our design variables. We used the orthogonal test method (OTM) to generate modified Blades with different tubercle variables that were then numerically simulated by a three-dimensional computational fluid dynamics (CFD) analysis. The Blade axial torque of the nine modified tests was compared with the original Blade. The results showed that the application of bionic tubercles on the suction side of the steam turbine Blade is a promising solution to improve the Blade axial torque for all modified tests with a maximum increase of 33.32% due to the turbulent vortices generated by bionic tubercles.

Ryszard Szczepanik - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of middle bearing failure in rotor jet engine using tip-timing and tip-clearance techniques
    Mechanical Systems and Signal Processing, 2016
    Co-Authors: Romuald Rzadkowski, Edward Rokicki, L. Piechowski, Ryszard Szczepanik
    Abstract:

    Abstract The reported problem is the failure of the middle bearing in an aircraft rotor engine. Tip-timing and tip-clearance and variance analyses are carried out on a compressor rotor Blade in the seventh Stage above the middle bearing. The experimental analyses concern both an aircraft engine with a middle bearing in good working order and an engine with a damaged middle bearing. A numerical analysis of seventh Stage Blade free vibration is conducted to explain the experimental results. This appears to be an effective method of predicting middle bearing failure. The results show that variance first increases in the initial Stages of bearing failure, but then starts to decrease and stabilize, and then again decrease shortly before complete bearing failure.

  • Analysis of Middle Bearing Failure in Rotor Jet Engine Using Tip-Timing and Tip-Clearance Technique
    Volume 7A: Structures and Dynamics, 2014
    Co-Authors: Edward Rokicki, Romuald Rzadkowski, Ryszard Szczepanik, Paweł Majewski, Jarosław Spychała, Marcin Drewczynski
    Abstract:

    The reported problem is the failure of the middle bearing in an aircraft rotor engine. Tip-timing and tip-clearance and variance analyses are carried out on a compressor rotor Blade in the seventh Stage above the middle bearing. The experimental analyses concern both an aircraft engine with a middle bearing in good working order and an engine with a damaged middle bearing. A numerical analysis of the seventh Stage Blade free vibration are conducted to explain the experimental results. This appears to be an effective method of predicting middle bearing failure. The Blade vibration variance increases when there is bearing failure.© 2014 ASME

  • Analysis Of Middle Bearing Failure In So-3 Jet Engine Using Tip-Timing
    2011
    Co-Authors: Ryszard Szczepanik, Edward Rokicki, M. Kowalski
    Abstract:

    Failure of the middle bearing in an SO-3 engine was reported. Tip-timing and pick detector analyses were carried out on a compressor rotor Blade in the seventh Stage above the middle bearing. The experimental analyses concerned both an SO-3 engine with a middle bearing in good working order and an engine with a damaged middle bearing. A numerical analysis of the free vibration of the seventh Stage Blade was conducted to verify the experimental ones. Proposed in this paper is a method to prevent middle bearing failure.

Chun Wang - One of the best experts on this subject based on the ideXlab platform.

  • The Effect of Suction Side Tubercles on Torque Output of a Steam Turbine Low-Pressure Last Stage Blade
    Energies, 2020
    Co-Authors: Jing Zhang, Chun Wang, Ziyue Mei, An Han, Danmei Xie
    Abstract:

    Flow separation and different kinds of stall flows occur under low load conditions for steam turbine last Stage Blades. In order to delay the flow separation and increase turbine power production, we applied suction side tubercles on steam turbine low-pressure last Stage Blades in the present study. The amplitude, wavelength, position, and thickness were considered as our design variables. We used the orthogonal test method (OTM) to generate modified Blades with different tubercle variables that were then numerically simulated by a three-dimensional computational fluid dynamics (CFD) analysis. The Blade axial torque of the nine modified tests was compared with the original Blade. The results showed that the application of bionic tubercles on the suction side of the steam turbine Blade is a promising solution to improve the Blade axial torque for all modified tests with a maximum increase of 33.32% due to the turbulent vortices generated by bionic tubercles.

Ziyue Mei - One of the best experts on this subject based on the ideXlab platform.

  • The Effect of Suction Side Tubercles on Torque Output of a Steam Turbine Low-Pressure Last Stage Blade
    Energies, 2020
    Co-Authors: Jing Zhang, Chun Wang, Ziyue Mei, An Han, Danmei Xie
    Abstract:

    Flow separation and different kinds of stall flows occur under low load conditions for steam turbine last Stage Blades. In order to delay the flow separation and increase turbine power production, we applied suction side tubercles on steam turbine low-pressure last Stage Blades in the present study. The amplitude, wavelength, position, and thickness were considered as our design variables. We used the orthogonal test method (OTM) to generate modified Blades with different tubercle variables that were then numerically simulated by a three-dimensional computational fluid dynamics (CFD) analysis. The Blade axial torque of the nine modified tests was compared with the original Blade. The results showed that the application of bionic tubercles on the suction side of the steam turbine Blade is a promising solution to improve the Blade axial torque for all modified tests with a maximum increase of 33.32% due to the turbulent vortices generated by bionic tubercles.