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Full-Text Articles in Mechanical Engineering
Unsteady Transonic Flow Over Slender Bodies, Cevdet Aydun
Unsteady Transonic Flow Over Slender Bodies, Cevdet Aydun
Mechanical & Aerospace Engineering Theses & Dissertations
The unsteady transonic small disturbance equation for an oscillating slender body is obtained from the full potential equation in cylindrical coordinates by means of a perturbation analysis. The time-dependent body-boundary condition is reduced into a simpler form by matching the outer and inner flows. Also, a time-dependent pressure coefficient over the slender body is derived by means of a matching principle. The simplified form of the body-boundary condition is incorporated into the difference equations at the body axis. This application allows use of the cylindrical coordinate system for the problem. By prescribing several different body-boundary conditions, various modes of body …
Plasma Polymerization Investigated By The Substrate Temperature Dependence., H. Yasuda, Cheng Wang
Plasma Polymerization Investigated By The Substrate Temperature Dependence., H. Yasuda, Cheng Wang
Chemistry Faculty Research & Creative Works
In the reported experiments, plasma polymerization of tetrafluoroethylene (TFE), perfluoro-2-butyl-tetrahydrofuran (PFBTHF), ethylene, and styrene were investigated in various combinations of monomer flow rates and discharge wattages for the substrate temperature range of minus 50 to 80 degree C. The polymer deposition rates can be generally expressed by k//o equals Ae** minus **b**t, where k//o is the specific deposition rate given by k//o equals (deposition rate)/(mass flow rate of monomer), A is the preexponential factor representing the extrapolated value of k//o at zero absolute temperature, and b is the temperature-dependence coefficient. It was found that the value of b is not …