Abstract
This paper presents the experience of the Hydroaerodynamics and hydraulic machinery department of the Technical university of Sofia (Bulgaria) in the research and design of cross flow water turbines. The methods and computer programs used for the synthesis of the elements of the flow part of the cross flow turbines are described. Results of numerical and experimental (model and field) studies of turbines of this type are presented. The peculiarities of the elements of the designed turbines are analyzed and specific examples of their used in small hydropower plants in Bulgaria are shown.
Highlights
Cross flow turbines are used for heads from 2 to 200 m, but their output is usually limited to 1 000 kW, because of comparatively low values of the efficiency
The cross flow turbine has a number of advantages in terms of specific requirements for low power water turbines: it works with relatively high efficiency values in a wide range of modes; it provides good manual and automatic control capabilities; the constructions are characterized by their relative simplicity, manufacturability and a high degree of unification of units and details; low cost
This paper presents the experience of the department of Hydroaerodynamics and hydraulic machinery at the Technical university of Sofia in the research and design of cross flow turbines
Summary
Cross flow turbines are used for heads from 2 to 200 m, but their output is usually limited to 1 000 kW, because of comparatively low values of the efficiency (up to 85 %). The cross flow turbine has a number of advantages in terms of specific requirements for low power water turbines: it works with relatively high efficiency values (for this class of turbines) in a wide range of modes; it provides good manual and automatic control capabilities; the constructions are characterized by their relative simplicity, manufacturability and a high degree of unification of units and details; low cost. This paper presents the experience of the department of Hydroaerodynamics and hydraulic machinery at the Technical university of Sofia in the research and design of cross flow turbines
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