Tag: Mechanical Engineering-Engineering Mechanics

Soroush Sepahyar
Mechanical Engineering-Engineering Mechanics

I started my PhD in Michigan Tech in August 2013 in Mechanical Engineering. My PhD research is focused on developing and testing a new technology in cooling systems. The application of this new technology is on future generation computer cooling systems such as Data Centers and Supercomputers. It would make cooling systems working more efficiently and reduce the environmental impact and energy costs when implemented.

Along with the research activities, since Fall 2014, I have been working as Graduate Teaching Assistant and had the opportunity to teach two different labs in MEEM department which was a great experience for me.

I would like to express my sincere gratitude for the Graduate School at Michigan Tech for this financial support. This gave me an opportunity to focus on my research and also put all my efforts toward completion of my PhD degree this semester.

I am also grateful for the generous donations from MTU alumni and Friends who made this opportunity possible for me.

Shadi Darani
Mechanical Engineering-Engineering Mechanics

I joined Michigan Tech as a Ph.D. student in 2015. My research interests include optimization and control algorithms. During my time as a student at MTU, I worked on an NSF project to develop novel optimization algorithms based on biology concepts. These algorithms can be used in various areas including optimization of spacecraft trajectories, wave energy converter design, energy-asset optimization in post-disaster power restoration, and robotic trajectory planning.
I would like to thank Michigan Tech for providing a great research and development environment. I am also very thankful to the Graduate School for recommending me for the Finishing Fellowship.

Xiucheng (Sheldon) Zhu
Mechanical Engineering-Engineering Mechanics 
The story is about the final successful experiments after two weeks happened in 2014 summer. I was doing spark ignition of propane in CV. It was the first time we test with propane mixture. We only had experience with methane before that. We need to prepare fuel mixture (usually 800 bar in a 10 L mixing vessel) before testing and put the mixture into CV for ignition. The mixture preparation could take up to 1 hour. After making a new propane mixture, the first several ignitions were failed, then we got ignition. However, the peak pressure after combustion kept increasing which indicates the mixture composition were varying. We checked the literature, some say that it is due to the stratification of the mixture, some say that there is no stratification at all. For about two weeks, we didn’t get any normal combustion events as expected. We tried almost every method we could think of. Finally, Tejas and I tried

to make less mixture (about 400 bar in a 10 L mixing vessel) and moved the mixing vessel piston up and down to help mix the mixture better. It was very a simple solution, but it did work. We got consistent combustion with this method, and we confirmed the stratification issue of propane mixture. That was the moment, we kept our fingers crossed, and felt vast joy. It feels like that you walked in the dark for a long journal and finally reach your destination. After that, we were keeping improving the mixing procedure by changing filling orders.

Kishan Bellur
Mechanical Engineering-Engineering Mechanics

I’m a PhD candidate in Mechanical Engineering-Engineering Mechanics at Michigan Technological University working with Jeffrey Allen in the microfluidics and interfacial transport lab. After graduating with a bachelor’s in mechanical engineering from Milwaukee School of Engineering in 2013, I decided to work in industry until I secured admission into a graduate program of my choice. In a few months, I was accepted at Michigan Tech and I started graduate school shortly after. I first met my adviser in my second semester and he talked to me about a research opportunity in cryogenic propellant (rocket fuel) evaporation and condensation and thus began my 4 year-long research career.

The primary motivation for my work thus far is rocket fuel management in space. Commonly used fuels, liquid hydrogen and liquid methane, are stored in metallic containers at temperatures as low as -260° C. The liquid fuel vaporizes with even minute amounts of heat, and results in a liquid-vapor mixture. This increases the pressure in the container, requiring ventilation to avoid over-pressurization, resulting in significant fuel loss. Fuel storage/management is one of the limiting factors to long term space missions. My dissertation focuses on novel methods to visualize, investigate, and predict the behavior of these fuels and enable long term manned space travel.

I am grateful for the finishing fellowship awarded by the Graduate School. There is no doubt that the support provided will someday result in “a giant leap for mankind”.

Meng Tang
Mechanical Engineering-Engineering Mechanics