Design and Development of Duct-Diffuser Augmented Propeller Low Head Hydro Turbines Faculty of...
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![Page 1: Design and Development of Duct-Diffuser Augmented Propeller Low Head Hydro Turbines Faculty of Engineering and the Environment Tauseef Ahmed – ta3e09@soton.ac.uk.](https://reader037.fdocuments.in/reader037/viewer/2022110205/56649cd75503460f9499eaef/html5/thumbnails/1.jpg)
Design and Development of Duct-Diffuser Augmented Propeller Low Head Hydro Turbines
Tauseef Ahmed – [email protected] - Faculty of Engineering and the EnvironmentFaculty of Engineering and the EnvironmentUniversity of Southampton
Supervisors – Dr Stephen Turnock , Dr Richard Wills, Dr Syed Waheed (NUST)
Fluid Structure Interactions Research Group
Introduction
On economic grounds, the criteria for design and development of Low Head Hydro
(LHH) turbines are based on minimum cost per unit power instead of maximum delivered
power. The drawback of this approach often results in undue design simplification, and
hence possibly unfeasible predictions of the likely hydraulic power potential along with
below average performance of the design models.
Governmental and global targets for reduction in carbon emissions, environmental
impacts and the capability of serving the ever increasing demand of power requirements in
the shortest time are driving forces for small/low head hydro power generation.
Design Criteria
The adopted methodology for maximum deliverable power criteria follow integration of
meaningful geometry for generalized design instead of site specific tuning of non-hydro
dynamic components. The addition of hydrodynamic flow regulating components for
power augmentation and system level modification of component for extended range of
application of technology are the main features of proposed criteria.
Design and development status of proposed LHH
Based on the design to manufacture approach and above mentioned criteria of maximizing
energy for extended range of application two LHH configurations namely Diffuser
Augmented and Duct-multilevel Diffuser Augmented turbine are proposed.
Following diagrams highlights schematic and component diagrams
CFD modelling and Analysis of proposed LHH turbine models
Objectives of the project
This research aims to support more consistent and optimised design
with enhanced systems performance for low/ultra- low head hydro-
electrical power generations. This project under International
Strategic Participation In Research and Education (INSPIRE)
initiative of British Council has the following goals
To exploit the potential of LHH for power output range 0.2Kw to
25kw
Flexible design for a range of operating conditions at system and
component level
Continuous operation at full capacity for maximum duration with
minimum control regulations (on grid/off grid)
To develop new design concept of low/small scale hydro power
generation
Hydro dynamically efficient turbine runner
Performance data acquisition of laboratory units for optimum
design of site specific units
Understand fully the design for propeller turbines using CFD
modelling, and laboratory experimentsAcknowledgement
This research is jointly sponsored by National University of Sciences and Technology (NUST) and British Council International Strategic Partnership In Research & Education (INSPIRE) Initiative
References [1] International Journal of Hydropower and Dams: World Atlas. Sutton: Aquamedia Publications, 2000.
National University of National University of Sciences and Technology Sciences and Technology (NUST)(NUST)
The modern design, analysis and manufacturing techniques can contribute to investigate
hydro potential as low as 1 meter head and a power output of 200 Watts
CAD/CAM based automated design and analysis process for LHH applications is opted
for real cost effective LHH designs.
To simulate internal flow within turbine passages for accurate prediction of flow physics,
3 D Navier Stroke equations are solved using commercial software ANSYS CFX. The
associated ANSYS ICEMCFD package for grid generation is used along with
SolidWorks for CAD modelling.
Figure 5 Diffuser Augmented complete CAD model assembly
Fig.8 Stream line plot of velocity distribution through the model turbine unit
Fig 9 Velocity distribution in stationary frame for modified geometry
Fig.7 Rotor-Stator Interface modelling
Application of Computational fluid dynamic
techniques particular to LHH turbine
operational range of parameters to evaluate
Complex 3-D flow visualization
Component behaviour characterisation
Design optimization
Small-scale hydro power is the key source
for further hydro development.
Optimization of existing recourses for
power harnessing has made application of
low head hydro power a choice for water
treatment plants, water and waste water
networks
TWh/Year
Figure 1 Global Hydro resources review in terms of power production [1]
runner
Diffuser
Figure 6 Duct-Diffuser Augmented complete CAD model assembly
Fig 2 Stator CAD model Fig 3 3D Runner CAD model
Fig 4 Runner and 7 degree diffuser CAD assembly