North Carolina Agricultural and Technical State University
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New Farmers of America Association
No full textYoung man with cow and two pigs in front of barn.https://digital.library.ncat.edu/photos/1214/thumbnail.jp
New Farmers of America Association
No full textA group of young men in a field playing baseball.https://digital.library.ncat.edu/photos/1089/thumbnail.jp
New Farmers of America Association
No full textA picture of a body of waterhttps://digital.library.ncat.edu/photos/1048/thumbnail.jp
Computational Fluid Dynamics Simulation on Blade Geometry of Novel Axial FlowTurbine for Wave Energy Extraction
No full textWave energy converters (WECs) utilizing the Oscillating Water Column (OWC) principle have gained prominence for harnessing kinetic energy from ocean waves. This study explores an innovative approach by transforming the pivoting Denniss–Auld turbine blades into a fixed configuration, offering a simplified alternative. The fixed-blade design emulates the maximum pivot points during the OWC’s exhalation and inhalation phases. Traditional Denniss–Auld turbines rely on complex hub systems to enable controllable blade rotation for performance optimization. This research examines the turbine’s efficiency without mechanical actuation. The simulations were conducted using ANSYS™ CFX 2023 R2 to solve the three-dimensional, incompressible, steady-state Reynolds-Averaged Navier–Stokes (RANS) equations, employing the k-ω SST turbulence model to close the system of equations. A grid convergence study was performed, and the numerical results were validated against available experimental and numerical data. An in-depth analysis of the intricate flow field around the turbine blades was also conducted. The modified Denniss–Auld turbine demonstrated a broad operating range, avoiding stalling at high flow coefficients and exhibiting performance characteristics like an impulse turbine. However, the peak efficiency was 12%, significantly lower than that of conventional Denniss–Auld and impulse turbines. Future research should focus on expanding the design space through parametric studies to enhance turbine efficiency and power output
New Farmers of America Association
No full textBoys playing basketball at camp. Signed \u27B. F. Hall.\u27https://digital.library.ncat.edu/photos/1445/thumbnail.jp
New Farmers of America Association
No full textFive young men outside a building with a trophy.https://digital.library.ncat.edu/photos/1444/thumbnail.jp
New Farmers of America Association
No full textMan showing outbuilding to a woman.https://digital.library.ncat.edu/photos/1437/thumbnail.jp
New Farmers of America Association
No full textThree men with produce.https://digital.library.ncat.edu/photos/1552/thumbnail.jp
New Farmers of America Association
No full textFlock of chickens.https://digital.library.ncat.edu/photos/1530/thumbnail.jp
New Farmers of America Association
No full textFront view of swine pen built by vocational agriculture students.https://digital.library.ncat.edu/photos/1524/thumbnail.jp