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Perspectives on the Treatment of Secondary Flows in Axial Turbines
Energy Procedia, 2017 A review is presented of the main end-wall treatments for the secondary flows of axial turbines. This encompasses the use of axisymmetric and non-axisymmetric contoured end-walls, the use of fences, and of air injection and blowing. Experimental and numerical results show promise in all these techniques. Interest seems to be drawing towards the use of
Aldo Rona, Hakim T Kadhim
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Axial Turbine Stage Characteristics
NTU "KhPI" Bulletin: Power and heat engineering processes and equipment, 2018 Today the energy consumption structure requires using the turbine units of thermal power plants of a high power to regulate the energy system frequency and power that drop by 35 to 40 % of the rated load during the night time or stop. Nevertheless, turbine stages operate in a wide range of the mode variation ranging from those that exceed the nominal ...
Slabchenko, Oleg, Goloshchapov, Vladimir
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Large multistage axial turbines
Energy Procedia, 2017 Abstract 1. Though multistage axial turbines are being widely used since many decades for water steam expansion or in gas turbines, their use in ORCs has traditionally found limitations as a consequence of the choice of designing turbines with cantilever arrangements. 2. The choice of the cantilever arrangement is mainly related to the advantages of
Roberto Bini, Davide Colombo
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Turbocharger Axial Turbines for High Transient Response, Part 2: Genetic Algorithm Development for Axial Turbine Optimisation [PDF]
Applied Sciences, 2019 In a previous paper, a preliminary design methodology was proposed for the design of an axial turbine, replacing a conventional radial turbine used in automotive turbochargers, to achieve improved transient response, due to the intrinsically lower moment of inertia.
Marco Berchiolli +3 more
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Radial Mixing in an Axial Turbine [PDF]
Volume 1: Turbomachinery, 1994 The objective of this work was to examine radial mixing in an axial turbine from a number of different perspectives. These include: (1) its impact on the spanwise distributions of the force on the airfoils and the change in the fluid momentum as it passed between them, (2) the mixing coefficient distribution based on measured secondary flow velocities,
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Researches on Axial Flow Turbines
Transactions of the Japan Society of Mechanical Engineers, 1958 Ordinary, we research the characteristics of turbine blades with cascade tunnel, but we cannot expect from those researches the characteristics of turbine blades at moving state. Then, it is necessary to carry actual turbine testings to know the dynamical characteristics of turbine blades.
NAKAMURA, Kozo +2 more
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TurboFlow: Meanline Modelling of Axial Turbines
Journal of Open Source SoftwareMeanline modeling is a fundamental approach used in the design and analysis of axial turbines (Dixon, 2014). The method simplifies the analysis by assuming a uniform flow and incorporates semi-empirical correlations to estimate performance. This approach allows for a reasonably accurate approximation at low computational cost.TurboFlow is a Python ...
Lasse B. Anderson +3 more
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Modeling of Turbine Engine Axial-Flow Compressor and Turbine Characteristics
Journal of Propulsion and Power, 2000 The paper describes the concept of modeling the turbine engine axial-flow compressor and turbine characteristics by using the function of two variables. Accuracy of the proposed concept has been verified on the example of the given compressor and turbine characteristics.
M. Orkisz, S. Stawarz
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Multidisciplinary optimization of an axial turbine
IOP Conference Series: Earth and Environmental ScienceAbstract The results of three different optimization setups for an axial propeller turbine consisting of a guide vane, a runner and a draft tube are presented. The first setup only contains the efficiency as objective and the design head as a constraint. In the second setup, the minimization of the cavitation volume is added as a further
S Fraas, A Tismer, S Riedelbauch
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Axial Turbine Cascade Correlation
Applied Sciences, 2016 The performance simulation of an axial turbine is achieved in a simple way from the calculation of velocity diagrams. For this purpose, a reliable loss model is needed for the flow through each stationary or rotating axial blade cascade. A loss coefficient assessment is conducted through the establishment of a correlation between the maximum profile ...
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