To that, choosing anappropriate model to capture

To overcome reliance, how can we innovate to support ourselves in a sustainable manner? Whycan’t we design cost-effective equipment indigenously instead of just relying on operationaladjustments of costly imported machinery? These questions always arose in my mind while doingan internship in a company’s maintenance department. Solving exercise numerical and just gettinggood grades was never the narrow focus I had. Just like Chaos theorists bring order into the chaosin terms of lines and shapes, albeit in an abstract mathematical space. Similarly, my motivation topursue the graduate education is to understand the unexplained interactions between significantcharacteristic flows through computational fluid dynamics. Just like Leonardo’s description anddepiction of vortices helped in the understanding of the complexity of turbulent flows. Similarly,I want to work on research problems that make it out of a lab and have a great impact on widerscientific issues and society in general. This mindset motivated me then, and it still motivates meto pursue graduate studies.As an undergraduate student of the final year, I had the opportunity to work on a final year projectof a small-scale horizontal axis wind turbine and investigates the effect of flanged diffuser for theefficient utilization of low-grade wind energy. We achieved 30 percent power augmentation byefficiently utilizing low-grade wind energy. This project is a huge success for rural areas with highwind potential, as hybrid renewable energy power systems can be used to provide electricity toremote locations where access to the centralized grid may be difficult. I had a range ofresponsibilities within the team that involved blade design, optimization, steady and transient statesimulations. Furthermore, I also worked on creating a cost-effective prototype, negotiating withthe vendors, and carrying out wind tunnel testing. The greatest challenge in the project was havingvery limited computational power in our lab CPU’s to carry out simulations, so we as a teambought a secondhand workstation to cope with heavy simulations. Besides that, choosing anappropriate model to capture flow separation in a diffuser, using networking skills to test theprototype at a wind tunnel facility also not available at our university was a huge challenge.Through these real-life experience, I have learned that research is demanding but a rewardingprocess- I learned to beautifully integrate mechanical, economic, and project management aspectsin order to design a successful diffuser augmented wind turbine.As a research assistant at Research Center for Modelling and Simulation in NUST, I had theopportunity to work on a project which involves optimization of the marine hydrokinetic turbinewhen enclosed in a diffuser, while considering the possibility of cavitation. In order to design theturbine rotor, we use HARP_Opt optimization code which uses a multi-objective genetic algorithmas well as Blade-element Momentum theory to optimize rotor design while also considering todelay cavitation-inception on the tidal turbine blades. The aim is to assess the performance usinga metric such as coefficient of performance, wake rotation and the mutual interaction between theduct and the blades to assess the overall power augmentation. Additionally, Computational Fluiddynamics will be used to validate this methodology. This project is funded by Higher EducationCouncil of Pakistan and is currently work in progress.Combustion has progressed a long way from times of the 1950s when Theodore Von Karman wasstill writing about the fundamentals of laminar flame propagation. Even though hugeadvancements have been made in computational methods, there still much remains to be done toimprove models, to derive robust and accurate simulation methods. For me personally, workingon turbulent combustion at this moment of time is very important when reserves for naturalresources are depleting. Though scientists are making huge advancement in renewable energy, it’sequally quintessential to simultaneously develop new combustion technologies that address ourcurrent fuel supply. To understand how to reduce emission and to reduce the temperature inside ajet engine during high power operation while maintaining similar fuel efficiency is my utmostpriority. To locate high temperature-NOx producing areas using computer modeling can help usbuild and design an efficient jet engine combustor.The thing that attracted me most to Tsinghua University is its state of art Center for CombustionEnergy research facility. This research facility provides the environment to work with people fromvarious interdisciplinary background. I perceive a match in Dr. Zhuyin Ren’s research as he hasdeveloped modern schemes to curb the challenges that previous combustion models faced andemployed novel approaches to tackle over-prediction of various phenomenon. With thetremendous experience in CFD technologies and turbulence modeling he has, I hope to have theopportunity to explore these interest at Tsinghua University. The interest this program gives toeducation, to work at state of art research centers, an intern at leading aerospace companies, alongwith outstanding faculty assures there is a match between what I hope to achieve and the graduateaerospace program Tsinghua offers. In addition, I look forward to living in Beijing, its amazingcultural and natural attractions will be additional and welcomed benefits.Upon completion of my graduate studies, I would like to enter a career in research and academicswith a special emphasis on creating novel combustion and propulsion concepts for future fuels,with fewer pollutant emissions and substantially enhanced efficiency. I look forward to thediscovery and challenge of my future career and test the boundaries of my ideas in both scienceand life¬†¬†

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