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Research >> Research Interests | Research projects
Creation of a computerised design system to perform knowledge-based integrated designs of multi-disciplinary design spaces. Department of Aerospace Engineering-University of Bristol, January 2007 to present, Funded by the EU’s Sixth Framework Programme.
Application of artificial neural networks in adaptive mesh generation, October 2006 to present.
Hyper dimensional design of structures using evolutionary techniques, June 2006 to December 2006.
Two hybrid genetic algorithms have been developed to perform integrated multi-objective optimal design of chain mechanisms with variable number of design variables. In the first algorithm, called sequential, the integrated design has been carried out by introducing a reasonable estimation for the objective function aiming at breaking it up into two independent objective functions. In the second algorithm, called embedded, a local-global optimisation approach has been taken to reduce the computational time and consequently to make the integrated design more cost effective.
A genetic algorithm has been used to carry out an optimal geometry design of trusses supporting distributed loads. Integration of truss domain and distributed load domain has been made by introducing “load conversion expediency” as a new concept.
Effect of non-uniform anisotropy on dynamic response of aerodynamic surfaces. University of the West of England, September 2005 to May 2006, Part of PhD research, Funded by Royal Aeronautical Society.
Aero-structure simulation and aerodynamic design of wind turbines with adaptive blades. University of the West of England, October 2003 to September 2005, Part of PhD research, partly funded by UWE.
A sophisticated computer code for numerical simulation of wind turbines with adaptive blades has been developed. The code is the only software especially designed and developed for simulation and design of wind turbines with intrinsically smart blades. It consists of an aerodynamic sub-code, an adaptive mesh generator and a FE solver, all written from scratch.
A combined Analytical/FEA-based method for coupled aero structure simulation of wind turbines with adaptive blades has been introduced. This method reduces the computational time of aerodynamic objective evaluation in the blade design process significantly.
A novel method for design of bend-twist adaptive blades has been introduced. It decouples the aerodynamic and structure design of an adaptive blade which is a coupled process in nature. Through a design case study, as the first aerodynamic design of a bend-twist adaptive blade, its efficiency and practicality has been proven and demonstrated.
Employing the simulator and applying the decoupled design methodology, a new potential benefit of using these blades in reduction of the operation time and actuation energy of pitch control systems has been introduced.
Mathematical modelling of frost growth and densification on cold surfaces in humid air flow. Faculty of Aerospace Engineering, Sattari University, June 1997 to May 1998.
A mathematical model for frost nucleation and growth was developed. Frost nucleation was modelled using a random place/diameter function. Dividing the frost growth into two periods, two different models of heat and mass transfer for each stage were applied. A needle model was used for the first stage of frost growth (with convective heat and momentum transfer as the dominant mechanisms of heat and mass transfer). In the next stage of growth, frost was modelled as a porous medium (with the diffusion and natural convection as the dominant mechanisms of heat and mass transfer).
A CFD program using mixed solution was developed. Finite Difference-axisymmetric-moving boundary discretization was used for the first stage of frost growth while the Finite Volume-1D-moving boundary had been used for the second stage. The predicted results were in excellent agreement with the experimental data.
Experimental investigation of frost formation on cold plates in humid air flow. Faculty of Mechanical Engineering, Amir-Kabir University of Technology, September 1994 to November 1995, MSc dissertation.
An apparatus was designed and built to generate a closed loop of a controlled humid air flow over a cold plate. Using the results obtained from a wide range of experiments, empirical co-relations, relating different thermo-physical properties of the frost to the air flow characteristics and cold plate temperature, were developed. Measuring the temperature gradient near the frost surface made it possible to explain the cause of re-densification phenomenon for the first time.
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