The Experts below are selected from a list of 2055 Experts worldwide ranked by ideXlab platform

P A S Reed - One of the best experts on this subject based on the ideXlab platform.

  • fatigue crack growth behaviour in the lcf regime in a shot peened Steam Turbine Blade material
    International Journal of Fatigue, 2016
    Co-Authors: K A Soady, B G Mellor, Gary Harrison, P A S Reed
    Abstract:

    In this study, short fatigue crack initiation and early growth behaviour under low cycle fatigue conditions was investigated in a shot peened low pressure Steam Turbine Blade material. Four different surface conditions of notched samples have been considered: polished, ground, T0 (industry applied shot peened process) and T1 (a less intense shot peened process). Fatigue crack aspect ratio (a/c) evolution in the early stages of crack growth in polished and shot peened cases was found to be quite different: the former was more microstructure dependent (e.g. stringer initiation) while the crack morphology in the shot peened cases was more related to the shot peening process (i.e. surface roughness, position with respect to the compressive stress and strain hardening profiles). Under similar strain range conditions, the beneficial effect of shot peening (in the T0 condition) was retained even at a high strain level (??11=0.68%), Nf, ground< Nf, T1 < Nf, polished < Nf, T0. The a/c evolution effects were incorporated in K-evaluations and used in calculating da/dN from surface replica data. Apparent residual stress (based on crack driving force ?K difference) was applied to describe the benefit of shot peening and was seen to extend significantly below the measured residual stress profile, indicating the importance of the strain hardening layer and stress redistribution effects during crack growth.

K A Soady - One of the best experts on this subject based on the ideXlab platform.

  • fatigue crack growth behaviour in the lcf regime in a shot peened Steam Turbine Blade material
    International Journal of Fatigue, 2016
    Co-Authors: K A Soady, B G Mellor, Gary Harrison, P A S Reed
    Abstract:

    In this study, short fatigue crack initiation and early growth behaviour under low cycle fatigue conditions was investigated in a shot peened low pressure Steam Turbine Blade material. Four different surface conditions of notched samples have been considered: polished, ground, T0 (industry applied shot peened process) and T1 (a less intense shot peened process). Fatigue crack aspect ratio (a/c) evolution in the early stages of crack growth in polished and shot peened cases was found to be quite different: the former was more microstructure dependent (e.g. stringer initiation) while the crack morphology in the shot peened cases was more related to the shot peening process (i.e. surface roughness, position with respect to the compressive stress and strain hardening profiles). Under similar strain range conditions, the beneficial effect of shot peening (in the T0 condition) was retained even at a high strain level (??11=0.68%), Nf, ground< Nf, T1 < Nf, polished < Nf, T0. The a/c evolution effects were incorporated in K-evaluations and used in calculating da/dN from surface replica data. Apparent residual stress (based on crack driving force ?K difference) was applied to describe the benefit of shot peening and was seen to extend significantly below the measured residual stress profile, indicating the importance of the strain hardening layer and stress redistribution effects during crack growth.

Kolamala Sreenivasulu - One of the best experts on this subject based on the ideXlab platform.

  • Thermal Analysis of a Steam Turbine Blade
    International Journal of Research, 2017
    Co-Authors: Challa Murali, Kolamala Sreenivasulu
    Abstract:

    Steam Turbine is an excellent prime mover to convert heat energy of Steam to mechanical energy. Of all heat engines and prime movers the Steam Turbine is best and it is widely used in power plants and in all industries where power is needed for process. In power generation mostly Steam Turbine is used because of its greater thermal efficiency and higher power-to-weight ratio. Because the Turbine generates rotary motion, it is particularly suited to be used to drive an electrical generator–about 80% of all electricity generation in the world is by use of Steam Turbines. In this project we are going to design a Turbine Blade assembly in Catia V5 R21 and thermal analysis is done in Ansys. In order to evaluate the effectiveness of Steam Turbine Blade by using FEA (ANSYS).software Thermal analysis is performed on both Aluminum and composite materials to find out the heat flux and thermal error.

V.m. Lakshmaiah - One of the best experts on this subject based on the ideXlab platform.

  • Thermal Analysis of a Steam Turbine Blade
    International Journal of Research, 2017
    Co-Authors: V.m. Lakshmaiah
    Abstract:

    Steam Turbine is an excellent prime mover to convert heat energy of Steam to mechanical energy. Of all heat engines and prime movers the Steam Turbine is nearest to the best and it is widely used in power plants and in all industries where power is needed for process. In power generation mostly Steam Turbine is used because of its greater thermal efficiency and higher power-to-weight ratio. Because the Turbine generates rotary motion, it is particularly suited to be used to drive an electrical generator–about 80% of all electricity generation in the world is by use of Steam Turbines. In this project we are going to design a propeller Blade assembly in Catia V5 R21 and thermal analysis is done in Ansys. In order to evaluate the effectiveness of composites and metal propeller using FEA packaged (ANSYS). Thermal analysis is performed on both Aluminum and composite propeller to find out the heat flux and thermal error.

N. Sunil - One of the best experts on this subject based on the ideXlab platform.

  • Thermal Analysis of a Three Dimensional Model for Low- Pressure Steam Turbine
    International Journal of Research, 2018
    Co-Authors: S Suhas, Ch. Anvesh, Javid Pasha, N. Sunil
    Abstract:

    A Steam Turbine is a device that extracts thermal energy from pressurized Steam and uses it to do mechanical work on a rotating output shaft. The LP Turbine is a pressure compounded, either single or dual axial flow, condensing reaction Turbine. which  receives  the  impulse  directly  from  the Steam  jet  and  converts  this  force  into  the  driving  force. Statistics  has  shown  that  LP  Blades  are  usually  more predisposed  to  failure  compared  to  Blades  in  HP  or  IP Turbines. To efficiently extract work out of this lower pressure Steam, reaction balding is used on the LP Turbine. In this project work analyses the effects of thermal and structural load on a low Steam Turbine Blade under the operating conditions.  Stresses due to thermal of low Pressure Steam Turbine Blade of power stations analyzed in working conditions. In first stage a three dimensional model of Turbine Blade was prepared in mechanical catia software. In this model using material is low steel alloys.