Abstract An aeroelastic model for wind turbine blades derived from the unsteady Navier‐Stokes equations and a mode shape–based structural dynamics are presented. For turbulent flows, system is closed with Spalart‐Allmaras turbulence model. The computation times aerodynamic solution significantly reduced using harmonic balance method compared to time‐accurate solution. This more robust than standard codes that rely on blade element momentum theory determine forces. Comparisons published...

In this paper, we use the harmonic balance method to study an oscillating S809 airfoil in dynamic stall. The periodic behavior of problem makes it well suited for method, which is able model unsteady aerodynamics at greatly reduced computational costs when compared with time-accurate unsteady-flow solvers. A finite-volume technique based on lower–upper symmetric Gauss–Seidel scheme Roe fluxes used solve Reynolds-averaged Navier–Stokes equations. turbulent viscosity computed one-equation...

The design and performance of two unique fluidized bed particle seeders were assessed experimentally. designed to seed the fuel stream freestream a scramjet combustor for image velocimetry measurements. seeder used alumina powder generate particles has been in past obtain silica is new design. Using probe filter paper, samples collected from output each at operating conditions near those encountered studies. imaged using scanning electron microscope qualitative quantitative data about...

Abstract Particle image velocimetry (PIV) has become a mature technology used in research and industry alike to quantify flow properties non-intrusively. Unfortunately, the cost remains too high for students apply method most undergraduate fluids laboratories. Moreover, high-powered pulsed lasers normally utilized PIV systems can be safety risk presence of large groups undergraduates. In this paper, low-cost acquisition analysis system that readily implemented laboratories is presented. A...

In order to accurately model particle-particle and gas-particle interactions in two-fluid Eulerian simulations, constitutive models are required for the solid phase. Discrete element (DEM) simulations can be used generate these models, but as particle mixtures increased complexity, there is also a need automate DEM process. this paper, extract dissipation rate stress terms over range of volume fractions using open-source code LIGGGHTS discussed. Automation process quickly databases different...

Abstract Traditional course delivery, with daily in-class lecture and a textbook for reference, presents number of shortcomings. In traditional lecture, students must transcribe notes from the board, which may take their attention away critical thinking associated trying to understand material. Additionally, tend not use textbooks as instructor intends, but rather choose pattern match examples homework problems, again limits deeper understanding content. Instructor-developed workbooks have...

Abstract Effective out-of-class homework assignments are critical to the success of an engineering curriculum. The number and length these play a crucial role in their ability help students comprehend retain recently acquired knowledge. Assignments that too infrequent often put off until right before due date, at which point effort into completion is typically rushed haphazard. Frequent must be proper difficulty, or can get frustrated with large amount time class disproportionately small...

Time-accurate aeroelastic simulations were conducted for a flat plate in low speed flow using FUN3D. In order to create an accurate CFD mesh capable of large deformations associated with limit cycle oscillations (LCOs), the was given thicker profile rounded edges. Good agreements obtained between and published experimental data from flutter up 21 m/s. The cause divergence results beyond this point is unknown, but it may be related structural nonlinearity effects. Sensitivities initial...