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  • 1
    Digitale Medien
    Digitale Medien
    Predicting the reliability of runner pits of diagonal-flow and adjustable-blade turbines (1996)
    Springer
    Power technology and engineering 30 (1996), S. 59-68 
    Details
    ISSN: 1570-1468
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02446388
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  • 2
    Digitale Medien
    Digitale Medien
    Optimal vorticity regime in the flow tract of a hydroturbine (1984)
    Springer
    Fluid dynamics 19 (1984), S. 398-404 
    Details
    ISSN: 1573-8507
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract A study is made of the problem of maximizing the power taken from the shaft of the working rotor of a hydroturbine for a fixed available energy difference in the framework of a two-dimensional axisymmetric flow model. Necessary conditions of optimality of first and second order are derived and used to set up an algorithm for numerical solution of the problem. The results of calculations are given, and a comparison is made with optimal solutions obtained using two- and one-dimensional models of axisymmetric flow.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01093903
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  • 3
    Digitale Medien
    Digitale Medien
    Calculation of the flow in the blade passages of pump-turbines on the basis of solutions of the direct axisymmetric problem of the theory of hydrodynamic machinery (1988)
    Springer
    Fluid dynamics 23 (1988), S. 493-499 
    Details
    ISSN: 1573-8507
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The direct axisymmetric problem of the theory of hydrodynamic machinery is considered for flows in the turbine and pump regimes. In formulating and numerically solving the problem the conditions at the edges of the blade systems [7, 8] expressing the principal conservation laws are taken into account. The three-dimensional pressure distribution in the blade systems is calculated using the asymptotic relations [1, 9]. The results of the calculations are presented and the theoretical and experimental data on the flows in the blade passages of high-speed pump-turbines are compared.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01055069
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  • 4
    Digitale Medien
    Digitale Medien
    Quasi-three-dimensional calculation of flow in blade passages of turbines (1991)
    Springer
    Fluid dynamics 26 (1991), S. 213-219 
    Details
    ISSN: 1573-8507
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The flow in turbomachines is currently calculated either on the basis of a single successive solution of an axisymmetric problem (see, for example, [1-A]) and the problem of flow past cascades of blades in a layer of variable thickness [1, 5], or by solution of a quasi-three-dimensional problem [6–8], or on the basis of three-dimensional models of the motion [9–11]. In this paper, we derive equations of a three-dimensional model of the flow of an ideal incompressible fluid for an arbitrary curvilinear system of coordinates based on averaging the equations of motion in the Gromek–Lamb form in the azimuthal direction; the pulsation terms are taken into account in the equations of the quasi-three-dimensional motion. An algorithm for numerical solution of the problem is described. The results of calculations are given and compared with experimental data for flows in the blade passages of an axial pump and a rotating-blade turbine. The obtained results are analyzed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01050142
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  • 5
    Digitale Medien
    Digitale Medien
    Calculation of inviscid secondary flows in hydromachinery blade systems (1993)
    Springer
    Fluid dynamics 28 (1993), S. 600-604 
    Details
    ISSN: 1573-8507
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The equations of the problem of calculating secondary flows in hydromachinery blade systems are obtained for the quasi-three-dimensional flow approximations. The results of calculating these flows for a Francis turbine and the pumping regime of a pumpturbine are presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01050039
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  • 6
    Digitale Medien
    Digitale Medien
    On the optimal design of the form of hydroturbine impeller blades (1997)
    Springer
    Structural and multidisciplinary optimization 13 (1997), S. 29-35 
    Details
    ISSN: 1615-1488
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract When designing a hydraulic turbine, a machine of better performance characteristics and primarily of the highest possible efficiency should be created. In the process, a designer is given a numer of restrictions concerning dam height, impeller diameter, etc. The turbine efficiency can be increased by varying the impeller blade profile or the angular velocity of the impeller rotation and by some other design techniques. The problem of optimization of hydroturbine parameters has been investigated in a number of works (see e.g. Fedorov 1983, 1984; Klimovich and Fedorov 1984; Kazachkov and Provad 1989). This paper presents some optimum decisions obtained for one-and two-dimensional axisymmetrical flow models. The turbine efficiency and local cavitation coefficients are accepted as the goal functionals. Necessary optimizing conditions are described, and calculated optimum characteristics of blade systems are given.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01198373
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  • 7
    Digitale Medien
    Digitale Medien
    Conditions along the boundaries of bladed zones within the flow tracts of turbines (1982)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 2 (1982), S. 299-311 
    Details
    ISSN: 0271-2091
    Schlagwort(e): Turbines ; Compressors ; Optimal Design ; Blade Design ; Engineering ; Engineering General
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Maschinenbau
    Notizen: Hamilton's variational principle is applied to derive a system of conditions which expresses the balance of momentum and energy of an ideal gas across the selvadgesThe reviewer of this paper confesses to be unfamiliar with the term 'selvadge(s)' which appears frequently herein. Clearly, however, it (variously) means 'boundary', 'edge', 'projection of edge line' (meridional or axial), 'locus of leading edges', etc. of bladed zones within the flow tracts of turbines. This system provides the background for a correct formulation of optimal design problems for turbines and compressors. The exposition follows the model of a large number of blades when the basic equations can be averaged over the azimuthal co-ordinate.An analysis is given of the obtained conditions and a computational algorithm described.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/fld.1650020307
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