investigation of impeller design and flow structures in

Evaluation of the Flow Characteristics in the Intake Structure and

Evaluation of the Flow Characteristics in the Intake Structure 81 Reynolds Number, Froude Number Weber number is not possible on geometrically similar smaller models. As the CFD analysis can be carried out on prototype also, the issues related to in

Experimental Investigation of Forced Response Impeller

The motivation for the investigation is the lack of experimental data that are needed to improve and validate computational tools used during the design phase. Measurements were performed during resonant blade vibrations with the inlet pressure, the inlet guide vane angle and the operating point as the varying parameters.

Theoretical Investigation on Flow Rate at the Maximum

This paper presents a theoretical investigation of the flow rate at the maximum efficiency point in the design of impeller blade in centrifugal pump. An energy balance was performed at the trailing edge of impeller outlet in the rotating flow passage of centrifugal pump.

Flow in a Centrifugal Pump Impeller at Design and Off

Pedersen, N., 2000, "Experimental Investigation of Flow Structures in a Centrifugal Pump Impeller Using Particle Image Velocimetry," Ph.D. thesis, Department of Mechanical Engineering, Fluid Mechanics Section, Technical University of Denmark, Copenhagen

Numerical Simulation of Gas

Abstract: The gas-liquid flow field in a stirred tank with a Rushton disk turbine, including the impeller region,was numerically simulated using the improved inner-outer iterative procedure. The characteristic features of the stirred tank, such as gas cavity and

Chapter 2. Hydrological Information for Design and

To design and operate hydraulic structures and systems the areal average of actual evapotranspiration should be determined. For this calculation the amount of water actually drained from each part of the catchment having different surface-conditions should be estimated.

Numerical Simulation of Gas

Abstract: The gas-liquid flow field in a stirred tank with a Rushton disk turbine, including the impeller region,was numerically simulated using the improved inner-outer iterative procedure. The characteristic features of the stirred tank, such as gas cavity and

Investigation of Flow Separation Characteristics in a Pump

The impeller, which is the main energy conversion component of a pump as turbine (PAT), is designed for pumping mode, and its internal flow characteristics are quite complicated even at the best efficiency point (BEP) of the turbine mode. This study aims to

CFD Modelling of a Pump Intake

flow characteristics and are caused primarily by poor design of the pump intake structure. Poor intake or wet well design may result in submerged or surface vortices, swirl of flow entering the pump, non-uniform distribution of velocity at the pump impeller

CFD Modelling of a Pump Intake

flow characteristics and are caused primarily by poor design of the pump intake structure. Poor intake or wet well design may result in submerged or surface vortices, swirl of flow entering the pump, non-uniform distribution of velocity at the pump impeller

The Use of Interference Diagrams to Avoid Impeller

Once the impeller design has been finalized in terms of aerodynamic performance, structural assessments and therefore geometry, Finite Element Analysis can be used to predict its natural frequencies and mode shapes (i.e. nodal diameters).

Design optimization of a mixed‐flow compressor impeller

Design optimization of a mixed‐flow compressor impeller for a small turbojet engine Design optimization of a mixed‐flow compressor impeller for a small turbojet engine Mert Cevik; Oguz Uzol 2011-05-17 00:00:00 Purpose – This paper aims to present the results of a design optimization study for the impeller of a small mixed-flow compressor.

AN INVESTIGATION OF THE HEAT TRANSFER

It is considered that the flow in the agitator is constant flow, and the temperature field does not change with the relative position of the impeller. The simulation uses the steady-state method, in which a constant temperature less than the coil temperature is given for the wall based on the non-steady state simulation settings.

Investigation of impeller design and flow structures in

2018/11/1The present study investigated the flow characteristics of water agitated by the impeller having the same design as those used in the aluminum industry. Water model experiments using the PIV measurement and the CFD simulation have been performed to investigate the effect of twisting angle on the flow pattern and vortex structures.

Investigation of unsteady flow

The periodically unsteady flow-induced impeller oscillations for a single-blade pump are investigated both numerically and experimentally under off-design conditions. A partitioned strategy with load transfer method is selected for achieving successful fluid-structure interaction (FSI) simulations with strong two-way coupling. Three-dimensional, unsteady Reynolds-averaged Navier-Stokes

CENTRIFUGAL PUMP SELECTION, SIZING, AND INTERPRETATION OF PERFORMANCE CURVES

point between 110% and 80% (see reference 16) of the B.E.P. flow rate with an operating point in the desirable impeller selection area (see Figure 4-8). 4.4 SYSTEM CURVE The system curve is a plot of the Total Head vs. the flow for a given system. The

Design of Multiple Impeller Stirred Tanks for the Mixing of Highly

Design of Multiple Impeller Stirred Tanks for the Mixing of Highly Viscous Fluids Using CFD Jolle Aubin* Catherine Xuereb Laboratoire de Gnie Chimique UMR CNRS 5503 5 rue Paulin Talabot, BP-1301, 31106 Toulouse Cedex 1, France Aubin J. and Xuereb

EXPERIMENTAL INVESTIGATION OF A CENTRIFUGAL BLOWER

flow rates. Centrifugal blowers are mainly two main parts, namely, the casing and the impeller. Many experimental studies have been reported on the performance of centrifugal pump impeller. The performance of centrifugal blower is mainly on design parameters of

centrifugal fan impeller design calculation

This paper gives redesigning a centrifugal impeller and its inlet duct. The method couples a three-dimensional unsteady flow calculation in the impeller with a three-dimensional time-averaged flow calculation in the volute through an iterative updating of the boundary conditions on the interface of both calculation domains. the 3D swept blade design, and the impeller width control, blades. I'm

centrifugal fan impeller design calculation

This paper gives redesigning a centrifugal impeller and its inlet duct. The method couples a three-dimensional unsteady flow calculation in the impeller with a three-dimensional time-averaged flow calculation in the volute through an iterative updating of the boundary conditions on the interface of both calculation domains. the 3D swept blade design, and the impeller width control, blades. I'm

Meridional shape design and the internal flow

This paper describes an inverse design method for calculating the shape of meridional plane of centrifugal impeller. This design method permits the shroud and hub contours to be indirectly calculated by medial axis contour and constraint equations. The design process is computationally inexpensive and can conveniently modify the shroud and hub shapes as the design's demand. Based on this

STATIC AND DYNAMIC ANALYSIS OF A CENTRIFUGAL

Khin Cho Thin et. al. [1] have carried out computational analysis of a centrifugal pump and predicted performance for off-design volume flow rate and calculated impeller volute disc friction loss, slip, shock losses, recirculation losses and other friction losses.

Proceedings of Engineering and Technology

to dead zones in the flow witch lower mixing efficiency [1]. Agitation of such fluids results in the formation of a zone of intense motion around the impeller (the also called the cavern) with essentially stagnant regions elsewhere [2]. The optimum design of a stirred

DETECTION AND ANALYSIS OF AZIMUTHAL MODES IN A CENTRIFUGAL IMPELLER

or rotating secondary flow structures with the rotating impeller blades are thought to generate the fluctuating forces on the blade surfaces and eventually to cause tonal noise. The origin of such flow structures, however, is not clear so far. Objective of this work is

Simulation study on the flow field of guide vane and

Due to the extremely complex internal flow of the impeller, the near‐wall separation, shock loss, secondary flow, and other problems will occur in the internal working fluid flow of the impeller. The research on the internal flow mechanism of the radial turbo expander is of great significance.

The Impeller Exit Flow Coefficient As a Performance Map

article{osti_1395135, title = {The Impeller Exit Flow Coefficient As a Performance Map Variable for Predicting Centrifugal Compressor Off-Design Operation Applied to a Supercritical CO2 Working Fluid}, author = {Liese, Eric and Zitney, Stephen E.}, abstractNote = {A multi-stage centrifugal compressor model is presented with emphasis on analyzing use of an exit flow coefficient vs. an inlet

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