自己写了两遍，同学帮着改了一下，已经用这个申完5锁了，但总觉得有些地方不合适，希望大家能提提意见，我重写也可以。. visit 1point3acres.com for more.|
Statement of Purpose. 鍥磋鎴戜滑@1point 3 acres
I was born in an age when aeronautical and astronautical technologies enjoy great development. Mars rovers Opportunity and Curiosity enlarged human's coverage to Mars. Hypersonic Aircraft X-43A increased the highest air-launched aircraft speed to nearly Mach 10. Enthusiastic about these advanced technologies and attracted by the incomparable charm of universe and flight, I choose aerospace engineering as my major and hope to make my part of contributions to its development. I wish I could become a designer or expert who can help with large and epochal research projects in the future.
I’m going to acquire my bachelor’s degree of Aerospace Engineering at *** in the next semester. Three years ago, by virtue of excellent grades in college entrance exam, I entered School of *** at***University, a special college admitting only 55 students from nearly 3000 freshmen. Here not only did I take professional courses concerning Aeronautics & Astronautics, but my mathematics and physics foundation got greatly strengthened by taking the basic disciplines opened up specially to bachelors of science. My exceptional records in courses like Mathematical Analysis, Advanced Algebra could prove this. Besides, having found my research interests early, I have learnt hypersonic and high temperature gas dynamics, rarefied gas dynamics, Fortran language programming, quantum mechanism, electrodynamics and etc. by self-learning. It’s a pity that my knowledge in these areas could not be shown on my transcript. Nonetheless I believe my theoretical foundations are competitive with other bachelors’ and will be an advantage for my further graduate study.
In the past three years, I also participated into some academic research and practices besides learning. I joined the *** lab in my second academic year and am tutored by ***. In the last year, cooperating with my senior schoolmate, I did some CFD calculations on supersonic flow over a flat plate for the project Research on a DSMC Approach and Its Application to a Two Dimensional Simulation of a Sharp Leading Edge under Mach 25. Now I am conducting a project named DSMC Simulation of Hypersonic Rarefied Gas Flow over Typical Shapes, which aims at creating a 2D-DSMC program compatible with complex grid and analyzing hypersonic rarefied gas flow over typical shapes. Although some related knowledge hasn’t been learned before, I’ve finished several subroutines and the project progresses well. I have also participated into the design and production of two unmanned aircraft vehicles. One is the Quad Tilt Rotor of our college workshop. I was responsible for the electronic platform and the design and production of horizontal tail. I wrote the automatic control program without any foundation in 2 months. Finally, we won the third prize in 23th Fengru Cup Competition with this UAV. The other is Zhedao of my interned company. Through these practices, I got a preliminary understanding of flight vehicle design and was familiar with commercial software like Fluent, Gridgen, Autodesk Inventor and etc. Nonetheless in comparison, I like academic research better.
My keen interests include the research related to hypersonic flow, CFD and fluid mechanics. The reasons for these are multiple.
For the hypersonic flow, I think it is one of the research directions with the most practical significance. It is closely related to cutting-edge technologies including high speed propulsion, planet entry and etc. The improvement of it will greatly benefit both civil and scientific applications. One typical example is the hypersonic aircraft, which saves both time and fuel with its unbelievable speed. However, related theories including thermal and chemical non-equilibrium, real gas effect, boundary layer transition, slip and rarefied flow and shock interaction still need to be perfected in order to make accurate simulation. Nobody could forget the tragedy of Space Shuttle Columbia, which brought seven astronauts’ lives away during re-entry just because of the damage to the heat shield material. Thus I do hope to devote my intelligence to the research of hypersonic flow in case the tragedy happens again. UCLA’s Hypersonic and Computational Aerodynamics group led by Professor Zhong, Xiaolin is my desirable lab. We have the same research interests and I have accumulated basic knowledge for his several research topics. The last but not the least, we’re both Chinese, which might make it easier for us to cooperate.
CFD is also my interesting area. With these years' learning, I realize CFD is not only a type of science to explain the physics nature, but also a useful and economical tool to solve engineering problems. Despite the fact that it has been developed for only a century, it has shown significant potentials in its abilities to replace some expensive or infeasible experiments. However, there still exist problems like turbulent modeling, grid effect, high-order scheme and limitations such as the simulation of rarefied gas flow and slip flow for CFD. I’d love to contribute to research including algorithms study and engineering application in the future.
Fluid mechanics, especially turbulent and transitional flows, is another research interest of mine. There is no doubt that turbulent and transitional flows are the top world’s problems. But their progresses including transition control, turbulent mixing and combustion will greatly benefit engineering as the catalyst. Aviation airplanes like A380, B747, and the most advanced B787, which both possess more economic efficiency and comfortable travel experience, are just typical examples. Indeed, UCLA’s Turbulence Research Group led by Professor Kim and Simulations of Flow Physics and Acoustic Laboratory led by Professor Eldredge attract me so much. Professor Kim’s experiences in numerical algorithms for turbulent study and his cutting-edge research make me believe my research skills and knowledge will both be improved under his instructions. And Professor Eldrege’s broad research directions including bio-fluid and computational studies interest me because in my opinion, the study of fluid mechanics should be applied in both Aerospace Engineering and other areas in our daily lives
In summary, I hope I could do some research related to hypersonic flow, turbulent and transitional flow based on numerical simulations or the algorithm studies of CFD in the future. Once I’m admitted by UCLA, I’ll endeavor to master the necessary knowledge and have my potentials fully tapped under the professors’ instructions. The ultimate degree I will pursue is Ph.D. of Aerospace Engineering. I'll try my best to get the opportunity to continue the PhD study in UCLA. I wish through the cultivation of scientific abilities, including the discovery and the analysis of problems, my contributions to a specific field can be made before I am graduated. When I finish my Ph.D. degree, engineer of an aeronautical technology company or faculty of a university are all my desirable jobs. It is the participation in the development of aerospace technologies that makes one of my greatest desires.
I sincerely hope the graduate admission committee could consider my application seriously and make me a member of the prominent school, the University of California, Los Angeles.