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Filtering by: Creator Chen, Heng Zhang Remove constraint Creator: Chen, Heng Zhang Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

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  • Design and Testing of the FUEL System: Integrating Engineering and Ethnographic Methods in Global Development Efforts

    Creator:
    Ventrella, Jennifer L.
    Abstract:
    Clean cooking technologies and fuels have been cited as a viable way to slow climate change and reduce the health and environmental impacts associated with traditional cooking devices used by 40% of the world. While engineers in the Design for Development sector have created hundreds of stove designs that perform...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Nordica MacCarty Shaozeng Zhang Clean cooking technologies and fuels

  • Analysis of energy conversion systems, including material and global warming aspects

    Creator:
    Zhang, Mingyuan
    Abstract:
    With the rapid increase of the world energy demand and consumption, the method and techniques to analyze, improve and optimize energy conversion systems have to deal not only with direct fuel exergy (energy) consumption, but also with other resources, which have associated exergy consumptions, and with environmental impacts, such as...
    Resource Type:
    Dissertation
    Full Text:
    Warming aspects by Mingyuan Zhang A THESIS submitted to Oregon State University in

  • Detection and analysis of separated flow induced vortical structures

    Creator:
    Snider, Stephen David Louis
    Abstract:
    Flow separation is an important phenomenon in fluid dynamics because of the effect it has on lift and drag on immersed bodies. Areas of swirl within a separated flow region may have a distinct effect on the surface forces, modifying the lift and drag characteristics. A correlation between the passage...
    Resource Type:
    Masters Thesis
    Full Text:
    supercomputers and Fortran. Thank you to Dr. Jim Liburdy, Dr. Eugene Zhang, Daniel Morse, and Guoning Chen for

  • Experiments on a low aspect ratio wing at low Reynolds numbers

    Creator:
    Morse, Daniel R.
    Abstract:
    At the start of the 21st century much of the focus of aircraft design has been turned to unmanned aerial vehicles (UAVs) which generally operate at much lower speeds in higher risk areas than manned aircraft. One subset of UAVs are Micro Air Vehicles (MAVs) which usually are no larger...
    Resource Type:
    Dissertation
    Full Text:
    Engineering department, Eugene Zhang and Robert Higdon, for being willing to serve on my committee. In

  • Empirical Characterization and Data-Driven Optimization of Water-Energy Systems

    Creator:
    Elhashimi, Mohammed A.
    Abstract:
    The accelerated development in water-energy systems calls for advanced modeling and optimization tools to improve technologies’ performance. Water desalination is a manifestation of water-energy system that is challenged by different operational constraints. The scarcity and uneven distribution of freshwater around the world makes water desalination an indispensable process to address...
    Resource Type:
    Dissertation
    Full Text:
    Chapter 2 Contributions:  Xiang Zhang: Assistance in experimental setup design and fabrication

  • Smooth Trajectory Generation for Machine Tools and Industrial Robots

    Creator:
    Tajima, Shingo
    Abstract:
    This thesis presents accurate and time-optimal smooth reference trajectory generation techniques for manufacturing equipment such as high-speed machine tools (MT) and industrial robots (IR). Typical machining tool-paths for MTs and IRs are defined as a series of discrete linear moves. Although Point-to-Point (P2P) feed motion can be generated by interpolating...
    Resource Type:
    Dissertation

  • Numerical and Experimental Evaluation of Membrane Based Energy Recovery Ventilator Performance with an Internal Support Structure

    Creator:
    Armatis, Paul D.
    Abstract:
    Large amounts of energy are wasted when conditioned air in buildings is exhausted to meet ventilation requirements. There are several technologies to recover some of this energy, including the recent development of membrane based energy recovery ventilators (ERVs). ERVs exchange sensible heat and moisture between incoming fresh and outgoing exhaust...
    Resource Type:
    Masters Thesis
    Full Text:
    ........................................................................... 10 Table 3.2: Geometry, inlet conditions and membrane properties from Zhang (2010) ..... 23 Table

  • Tracking of Melt Pool Motion Using Numerical Analysis of Laser Powder Bed Fusion

    Creator:
    Cox, Bryce
    Abstract:
    Laser Powder Bed Fusion (LPBF) is a process commonly used to create additively manufactured metal parts. The flexibility and complexity allowed by the LPBF process provides opportunity for significant advancement in multiple industries as parts can be customized in shape and function for specific needs. These benefits can be compounded...
    Resource Type:
    Dissertation
    Full Text:
    sources of porosity in parts created by LPBF [47]. Ling Zhang et al [48] hoped to improve part quality

  • Effect of Laser Powder Bed Fusion Parameters and Hot Isostatic Pressing on the Microstructure and Mechanical Properties of C22 Alloy

    Creator:
    Yan, Dongqing
    Abstract:
    A nickel-based Hastelloy C22 powder with a nominal composition of Ni-21.30Cr-13.36Mo-1.92Co-2.94W-3.85Fe-0.23Mn-0.3V(wt%) and particle size distribution of D₁₀=23.8±0.3 μm, D₅₀=37.5±0.2μm, and D₉₀=59.3±1.1 μm was gas atomized to be used as a feedstock in Laser Powder Bed Fusion (LPBF). In this study, laser power and scanning speed were optimized to manufacture specimens...
    Resource Type:
    Masters Thesis
    Full Text:
    , C. Zhang, D. Wang, W. Liu, X. Fang, D. Wellmann, Y. Zhao, Y. Tian, A review on laser powder bed

  • Design of 3D-Printed Soft Pneunet Actuator for Robotic Fruit Harvesting

    Creator:
    Wilhelm, Lissette J. H.
    Abstract:
    This work details the development of 3D printed TPU pneunet actuators for use in apple picking for agricultural soft robotics. These actuators increase the force capabilities of soft pneunets and simplify manufacturing. Grippers based on these actuators are ideal for apple picking because they are compliant, yet exert sufficient force...
    Resource Type:
    Honors College Thesis
    Full Text:
    actuators. 14 7 References [1] Zhao De-An, Lv Jidong, Ji We, Zhange Ying, and Chen Yu. “Design and