A5065556074- Cavitation Phenomena in Pumps
- Hydraulic and Pneumatic Systems
- Turbomachinery Performance and Optimization
- Fluid Dynamics and Mixing
- Cyclone Separators and Fluid Dynamics
- Water Systems and Optimization
- Fluid Dynamics and Turbulent Flows
- Hydraulic flow and structures
- Lattice Boltzmann Simulation Studies
- Combustion and flame dynamics
- Heat Transfer and Boiling Studies
- Heat Transfer Mechanisms
- Vibration and Dynamic Analysis
- Chaos control and synchronization
- Oil and Gas Production Techniques
- Aerosol Filtration and Electrostatic Precipitation
- Wind Energy Research and Development
- Aerodynamics and Acoustics in Jet Flows
Xi'an University of Technology
2020-2024
As key devices to lift deep-sea oil and gas, mixed-flow pumps can transport multiphase flow with high inlet gas volume fraction (IGVF). Performance parameters of may be disturbed by the complex gas–liquid distribution under various conditions that need an accurate two-phase numerical methodology for prediction. In this work, mixed performance a pump is investigated based on modified drag force model, which considers bubble deformation at IGVF. The effects IGVF pressure increment phase are...
The mixed-flow pump performs well in transporting gas–liquid mixtures with large flow rates and high inlet gas volume fractions. However, its extensive development is still limited by the operating range poor overall performance. In this study, a multiobjective multicondition optimization methodology for improving performance of based on inverse design proposed. impeller blade load taken as variable. Moreover, Euclidean distances pressure increment, efficiency, fraction diffuser are adopted...
Abstract In this study, a numerical simulation method based on Eulerian–Eulerian model and population balance (PBM) (i.e., computational fluid dynamics (CFD)–PBM coupling model) was developed to investigate the gas–liquid two-phase performance of centrifugal pump under bubble inflow. The realizable k–ε turbulence implemented in ansysfluent solver. air water were employed as working fluids, which consistent with experiment. head pressure increment obtained by experiment used validate method....
The flow in mixed-flow pumps under gas–liquid operating conditions is complex, involving special phenomena such as secondary and bubble breakup coalescence. As a result, its pressure fluctuation characteristic far different from that pure water conditions. In this work, the energy performance, characteristics, pattern inlet gas volume fractions (IGVFs) are studied through visualization test pump. air pocket forms easily close to suction side of diffuser vanes, where two monitoring points set...
Abstract In order to explore the influence of different blade loading distribution on noise characteristics centrifugal fan, this paper takes hub and shroud fan as design parameters, establishes four models with distribution. The aerodynamic radiation are calculated by transient results. research shows that change maximum is generated at volute tongue, total sound pressure level gas along flow direction a downward trend. area large vibration displacement surface occurs back cover plate...
Abstract The immersed boundary lattice Boltzmann method (IB-LBM) was applied to numerically simulate the runaway process of tubular turbines with influence free surface upper and lower reservoirs. First, accuracy IB-LBM verified, then external performance internal flow characteristics units during were studied. results show that gravity causes uneven pressure distribution at inlet turbine considering reservoirs, resulting in complicated pattern, which cannot be ignored study. In course...
Abstract To know the flow characteristics in horizontal elbow suction pipe connected to sumps of large-scale pumping stations, distribution air-entraining vortex and water velocity is studied using ANSYS CFX with considering gravity. The Volume Fluid (VOF) method adopted track level sump. results show that a typical funnel-shaped continuous observed via air volume fraction. Its size gradually increases from inlet outlet pipe. pressure changes linearly depth under effect gravity whereas shows...
Abstract In this paper, the numerical simulation software ANSYS-CFX is used to simulate flow field in radial pump together with SST k-ω turbulence model. The cross-power spectra analysis method examine internal rotating stall diffuser region. characteristics occurring part-load condition inside vaned were discussed by using
Abstract To obtain the external characteristic parameters and distribution of hydraulic loss, ANSYS CFX code is used to for numerical simulations a tidal bidirectional tubular turbine under positive reverse conditions. The method entropy generation analysis energy loss in unit its local rate. Besides, influence shaft inclination guide vane on explored. results show that there certain connection between traditional analysis. Entropy could be adopted measurement with distribution. total...