A5022377505- Turbomachinery Performance and Optimization
- Cavitation Phenomena in Pumps
- Computational Fluid Dynamics and Aerodynamics
- Refrigeration and Air Conditioning Technologies
- Hydraulic and Pneumatic Systems
- Heat Transfer Mechanisms
- Combustion and flame dynamics
- Tribology and Lubrication Engineering
- Microfluidic and Capillary Electrophoresis Applications
- Water Systems and Optimization
- Heat Transfer and Optimization
- Aerodynamics and Acoustics in Jet Flows
- Fluid Dynamics and Turbulent Flows
- Vibration and Dynamic Analysis
- Fluid Dynamics Simulations and Interactions
- Heat Transfer and Boiling Studies
- Microgrid Control and Optimization
- Advanced Multi-Objective Optimization Algorithms
- Microfluidic and Bio-sensing Technologies
- Acoustic Wave Phenomena Research
- Ship Hydrodynamics and Maneuverability
- Engineering Applied Research
- Advanced Combustion Engine Technologies
- Lattice Boltzmann Simulation Studies
- Aerodynamics and Fluid Dynamics Research
University College London
2014-2024
Design Science (United Kingdom)
2017-2023
Ebara (Japan)
2018
UCL Australia
1998-2014
Japan External Trade Organization
2005
École Centrale de Nantes
2004
Abstract A fully three‐dimensional compressible inverse design method for the of radial and mixed flow turbomachines is described. In this distribution circumferentially averaged swirl velocity r V θ on meridional geometry impeller prescribed corresponding blade shape computed iteratively. Two approaches are presented solving problem. approximate approach pitchwise variation in density neglected as a result algorithm simple efficient. exact velocities throughout field by employing fast...
Automatic optimization techniques have been used in recent years for the aerodynamic and mechanical design of turbomachine components. Despite many advantages, their use is usually limited to simple applications industrial practice, because high computational cost. In this paper, an strategy presented, which enables three-dimensional multipoint, multiobjective turbomachinery blades a time frame compatible with standards. The based on coupling inverse design, response surface method,...
The present paper describes the parametric design of a mixed-flow water-jet pump. pump impeller and diffuser geometries were parameterized by means an inverse method, while CFD analyses performed to assess hydrodynamic suction performance different configurations that investigated. An initial was first generated used as baseline for study. effect several parameters then analyzed in order determine their on performance. use blade parameterization, based design, led major advantage this study,...
The increasing share of renewable energy sources in the global electricity generation defines need for effective and flexible storage solutions. PHES with their technically matured plant design wide economical potential can generally match those needs. But especially lowland countries, where low-head applications are needed, current turbomachinery technologies offer no viable solutions LH-PHES to be a competitive technology context realizing European Green Deal. new developments hydraulic...
According to the European-Green-Deal, share of renewable energy sources (RES) in electricity generation is increased by e.g. solar/wind. This requires deployment effective storage solutions compensate fluctuating network supply RES. A well-developed technology pumped hydro (PHES), but especially lowland countries, Denmark, typical high-head plant locations are missing. Therefore, new developments low-head hydraulic turbomachineries and smart operation schemes needed shape LH-PHES towards a...
In this paper, for the first lime, a set of guide-lines are presented systematic design mixed flow and centrifugal compressors pumps with suppressed secondary flows uniform exit field. The paper describes shape optimum pressure distribution suppression in impeller reference to classical theory. feasibility achieving is then demonstrated by deriving specifications 3D inverse method, which blades designed subject specified circulation or 2πrV¯θ. will define choice blade loading ∂rV¯θ/∂m...
A new approach to optimizing a pump diffuser is presented, based on three-dimensional inverse design method and Computational Fluid Dynamics (CFD) technique. The blade shape of the was designed for specified distribution circulation given meridional geometry at low specific speed 0.109 (non-dimensional) or 280 (m3/min, m, rpm). To optimize pressure fields secondary flow behavior inside passage, more fore-loaded hub side as compared with casing side. Numerical calculations, using stage...
This paper describes the design of blade geometry a medium specific speed mixed flow pump impeller by using three-dimensional inverse method in which circulation (or rVθ) is specified. The objective reduction exit nonuniformity reducing secondary flows on suction surface. detail aerodynamic criteria used for suppression with reference to loading distribution and stacking condition design. through designed computed Dawes’ viscous code, indicates that are well suppressed Comparison between...
Abstract A deep understanding of loss mechanisms inside a turbomachine is crucial for the design and analysis work. By quantifying various losses generated from different flow mechanisms, targeted optimization can be carried out on blading design. In this paper, an evaluation method computational fluid dynamics (CFD) simulations has been developed to quantify generation based entropy production in field. breakdown caused by (such as skin friction, secondary flow, tip clearance vortex, shock...
Abstract The pan‐European power grid is experiencing an increasing penetration of Variable Renewable Energy (VRE). fluctuating and non‐dispatchable nature VRE hinders them in providing the Ancillary Service (AS) needed for reliability stability grid. Therefore, Storage Systems (ESS) are along VRE. Among different ESS, a particularly viable reliable option Pumped Hydro (PHS), given its cost‐effective implementation considerable lifespan, comparison to other technologies. Traditional PHS...
The application of a three-dimensional (3D) inverse design method in which the blade geometry is computed for specified distribution circulation to turbomachinery blades explored by using two examples. In first instance applied radial and mixed flow impellers suppress secondary flows. Based on our understanding fluid dynamics impeller, simple guidelines are developed input specification order systematically with suppressed flows more uniform exit field. second example vaned diffuser. Again...
A three-dimensional design method for the of blade geometry centrifugal compressor impellers is presented. In this shape computed a specified circulation distribution, normal (or tangential) thickness and meridional geometry. As shapes are by using an inviscid slip flow tangency) condition, viscous effects introduced indirectly viscous/inviscid procedure. The Navier–Stokes solver developed Dawes used as method. Two different approaches described incorporating into One based on introduction...
In this paper the three-dimensional inverse design code TURBOdesign-1 is applied to of blade geometry a centrifugal compressor impeller with splitter blades. conventional impellers blades normally have same as full and are placed at mid-pitch location between two blades, which can usually result in mismatch flow angle angles leading edge. method computed independently for specified distribution loading on basic methodology outlined then designed compared detail by using computational fluid...
The present paper describes the parametric design of a Francis turbine runner. runner geometry is parameterized by means 3D inverse method, while CFD analyses were performed to assess hydrodymanic and suction performance different configurations that investigated. An initial was first generated used as baseline for study. effects several parameter, namely stacking condition blade loading then investigated in order determine their effect on performance. use parameterization using method lead...
The flow driven by a valveless micropump with single cylindrical pump chamber and two diffuser/nozzle elements is studied theoretically using 1-D model. cavity at an angular frequency omega so that its volume oscillates amplitude <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">V</i> <sub xmlns:xlink="http://www.w3.org/1999/xlink">m</sub> . presence of pressure-drop coefficients zeta xmlns:xlink="http://www.w3.org/1999/xlink">+</sub> ,...
Abstract Renewable sources of energy are on the rise and will continue to increase coming decades [1]. A common problem with renewable is that they rely effects which cannot be controlled, for instance strength wind or intensity sunlight. The ALPHEUS Horizon 2020 EU project has aim develop a low-head hydraulic pump-turbine can work as grid stabilising unit. This presents numerical results an initial hub-driven counter-rotating design within ALPHEUS. Computational fluid dynamics simulations...