The Experts below are selected from a list of 5763 Experts worldwide ranked by ideXlab platform

Vincent Lemort - One of the best experts on this subject based on the ideXlab platform.

  • comprehensive analytic solutions for the geometry of symmetric Constant Wall Thickness scroll machines
    International Journal of Refrigeration-revue Internationale Du Froid, 2014
    Co-Authors: Ian H Bell, Eckhard A Groll, James E Braun, Travis W Horton, Vincent Lemort
    Abstract:

    Abstract In this work, a comprehensive framework and geometric solutions are presented for the most common type of scroll machine, the symmetric Constant-Wall-Thickness scroll compressor based on the involute of a circle. This analytic treatment comprises solutions for the volume, derivative of volume, centroid, normalized force and moment parameters, and leakage areas for all chambers in the machine. The representations for the centroid and area are based on Green's Theorem analysis which allows for general solutions that can then also be applied to other machines. Analytic solutions are also presented for the discharge geometry corresponding to arc-line-arc, perfect-meshing-profile, one-arc, and two-arc discharge geometries. Each of the derived parameters is validated against numerical solutions based on polygons. Source code in the Python programming language is provided for the analytic derivations as well as the implementation of each of the analytic outputs.

Ian H Bell - One of the best experts on this subject based on the ideXlab platform.

  • comprehensive analytic solutions for the geometry of symmetric Constant Wall Thickness scroll machines
    International Journal of Refrigeration-revue Internationale Du Froid, 2014
    Co-Authors: Ian H Bell, Eckhard A Groll, James E Braun, Travis W Horton, Vincent Lemort
    Abstract:

    Abstract In this work, a comprehensive framework and geometric solutions are presented for the most common type of scroll machine, the symmetric Constant-Wall-Thickness scroll compressor based on the involute of a circle. This analytic treatment comprises solutions for the volume, derivative of volume, centroid, normalized force and moment parameters, and leakage areas for all chambers in the machine. The representations for the centroid and area are based on Green's Theorem analysis which allows for general solutions that can then also be applied to other machines. Analytic solutions are also presented for the discharge geometry corresponding to arc-line-arc, perfect-meshing-profile, one-arc, and two-arc discharge geometries. Each of the derived parameters is validated against numerical solutions based on polygons. Source code in the Python programming language is provided for the analytic derivations as well as the implementation of each of the analytic outputs.

Peter R. Sahm - One of the best experts on this subject based on the ideXlab platform.

  • porosity formation in axi symmetric castings produced by counter pressure casting method
    International Journal of Heat and Mass Transfer, 2001
    Co-Authors: Ivaylo H Katzarov, Y B Arsov, A Buehrigpolaczek, Pantcho Stoyanov, T. Zeuner, Peter R. Sahm
    Abstract:

    We propose a method for simultaneous treatment of heat and mass transfer processes and porosity formation of castings produced by Counter Pressure Casting (CPC) method. The method enables us to account for the influence of the CPC parameters on the mechanical properties of the casting. Numerical results and comparison with experimental data are given for an axis-symmetric casting (hemisphere with Constant Wall Thickness).

S. Fiebig - One of the best experts on this subject based on the ideXlab platform.

  • Topology optimization for finding shell structures manufactured by deep drawing
    Structural and Multidisciplinary Optimization, 2017
    Co-Authors: R. Dienemann, A. Schumacher, S. Fiebig
    Abstract:

    This paper presents a new approach for optimizing shell structures considering their mid surface design including cut-outs. Therefore we introduced a manufacturing constraint to the 3D topology optimization based on the density method in order to receive an optimized structure without undercuts and with a Constant Wall Thickness, so that these structures can be manufactured by deep drawing in one step. It is shown that introducing cut-outs while increasing the shell Thickness can improve the performance of shell structures considering their stiffness at a Constant mass.

Eckhard A Groll - One of the best experts on this subject based on the ideXlab platform.

  • comprehensive analytic solutions for the geometry of symmetric Constant Wall Thickness scroll machines
    International Journal of Refrigeration-revue Internationale Du Froid, 2014
    Co-Authors: Ian H Bell, Eckhard A Groll, James E Braun, Travis W Horton, Vincent Lemort
    Abstract:

    Abstract In this work, a comprehensive framework and geometric solutions are presented for the most common type of scroll machine, the symmetric Constant-Wall-Thickness scroll compressor based on the involute of a circle. This analytic treatment comprises solutions for the volume, derivative of volume, centroid, normalized force and moment parameters, and leakage areas for all chambers in the machine. The representations for the centroid and area are based on Green's Theorem analysis which allows for general solutions that can then also be applied to other machines. Analytic solutions are also presented for the discharge geometry corresponding to arc-line-arc, perfect-meshing-profile, one-arc, and two-arc discharge geometries. Each of the derived parameters is validated against numerical solutions based on polygons. Source code in the Python programming language is provided for the analytic derivations as well as the implementation of each of the analytic outputs.