Characteristic curves of centrifugal pumps are their head, kW (bhp), NPSHR and iso-efficiency curves plotted against capacity for a given rpm. They are extremely important in the pump selection process. Head/capacity curves come in several forms: a single curve that might represent the maximum ...
athen are discussing the pollution problem of the cities. 然后谈论城市的污染问题。 [translate] aThe pump performance and characteristics as given on this performance curve will be a part of the supplier’s contractual obligation within the tolerances agreed upon. 正在翻译,请等待... [translate] ...
B-Spline Surface Construction for the Complete Characteristics of Pump-Turbine Based on the modeling technique of B-spline curve and surface, a B-spline space curved surface in coordinate system is constructed for the representation o... J Yang,J Yang - IEEE 被引量: 29发表: 2012年 Efficient...
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curve of a small axial flow pump in reverse power generation operation and noted that the axial flow pump can be used as a turbine to reverse power generation in a low-head Pico hydropower plant. Qian et al.10studied two pump and turbine modes for a small axial flow pump and found that...
Pumps have been clustered on the basis of specific characteristics of their 'environment', including pump age, operating time, pump capacity and degree of pollution of the sewage. The analysis shows that the well known 'bathtub' type failure rate curve can describe failures of sewage pumps. The...
Despite the considerable efforts that have been devoted to the study of head-flow curve instability in single-stage centrifugal pumps with volute casing, the cause of such phenomenon is not sufficiently understood. In this study, we investigated the variation of hydraulic losses based on the......
Compaction creep characteristic curve of gangue with different particle sizes (2 MPa). Full size image It can be seen from Fig. 5 that, samples with different particle sizes of gangue experienced two stages: stress compaction and stable creep. When the confining pressure is constant at 2 MPa....
The energy input, E, produced by the bearing coefficients is calculated by integrating the multiplication product of force and displacement around the closed curve of the ellipse. For the cross coupled stiffness coefficients, Zeidan et al.27 has shown that:...