On the basis of many tests and designs, an improved method for the hydraulic design of double-channel pumps was provided, and some main parameters of the impeller and volute by statistics and analysis were concluded.
According to the hydraulics theorem, the effect of pump effciency and passage effi-ciency on system effcency in dual-direction pumping stations have been analyzed.
The design of the pump suction sump will influence the running efficiency and security performance. In this new pump suction sump, there are three special design characters:closed structure,double inlet and double track structure, and transition plane structure.
The methods for calculating radius R_1 of front cover board and radius R_2 of back cover board were presented. The midline equation of impeller plan channel was suggested in this paper for the first time.
Elaboration and use of a double channel detection ion chromatographic method for determination of ions in aqueous samples
Because in some cases it can be important to gather more detailed information on the composition of a sample, we present a way to meet this demand by using double channel detection.
Comparison of single and double channel I/O-configurations
It can be carried out in a double channel manifold, using a magnetically well stirred dilution chamber for the emulsification of the samples, previous to their analysis by flame atomic absorption spectrophotometry.
The resonance frequency in the small-signal modulation response of devices depends on the etching depth of the U-shaped double channel; it increases from 0.4?GHz without channel etching to 4.3?GHz with 7-μm-thick etching.
This suggests a double-channel transport mechanism: one related to porous-silicon "volume" properties and the other more connected to the "surface" itself.
Sample ashes, obtained in the muffle, are diluted with nitric acid and the obtained slurry is introduced directly into an air-C2H2 flame for the analysis of Fe, Mn, and Zn, or injected into a double-channel FIA manifold to determine Ca, Mg and K.
A new method is proposed for simultaneous determination of traces of arsenic (As) and selenium (Se) in biological samples by hydride-generation double-channel non-dispersive atomic-fluorescence spectrometry (HG-AFS) from tartaric acid media.
A double-channel spectrometer, which enables to acquire ultrabroadband single-pulse spectra of liquids by Coherent Anti-Stokes Raman Spectroscopy (CARS), is described.
InGaAsP/InGaAsP multiple-quantum-well (MQW) double-channel planar-buried heterostructure (DCPBH) lasers emitting at λ～?1.57?μm were fabricated by optimizing the epitaxial growth with material characterization.
According to the hydraulics theorem, the effect of pump effciency and passage effi-ciency on system effcency in dual-direction pumping stations have been analyzed. Only thescale effect of linear loss must be considered when converting the system efficiency from themodel to the prototype, and new conversion formula has been put forward.
The design of the pump suction sump will influence the running efficiency and security performance. In this new pump suction sump, there are three special design characters:closed structure,double inlet and double track structure, and transition plane structure. PIV technique are used to measure the flow on the pump suction sump model, the results show that this pump sump can disperse and decrease the vortices mostly, and improve the flow conditions on the sump. So this pump suction sump can advance the running...
The design of the pump suction sump will influence the running efficiency and security performance. In this new pump suction sump, there are three special design characters:closed structure,double inlet and double track structure, and transition plane structure. PIV technique are used to measure the flow on the pump suction sump model, the results show that this pump sump can disperse and decrease the vortices mostly, and improve the flow conditions on the sump. So this pump suction sump can advance the running efficiency and security performance of pump stations.
On the basis of many tests and designs, an improved method for the hydraulic design of double-channel pumps was provided, and some main parameters of the impeller and volute by statistics and analysis were concluded. The methods for calculating radius R_1 of front cover board and radius R_2 of back cover board were presented. The midline equation of impeller plan channel was suggested in this paper for the first time. The calculation methods on the inlet diameter D_3 and width b_3, the tongue angel φ_0 and area...
On the basis of many tests and designs, an improved method for the hydraulic design of double-channel pumps was provided, and some main parameters of the impeller and volute by statistics and analysis were concluded. The methods for calculating radius R_1 of front cover board and radius R_2 of back cover board were presented. The midline equation of impeller plan channel was suggested in this paper for the first time. The calculation methods on the inlet diameter D_3 and width b_3, the tongue angel φ_0 and area F_3, and area ratio y were given. The research results have been applied to the product design of double-channel pumps.
双流道
double channel
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