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Showing 1 to 20 of 122 for “"Potential Flow"”.
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Potential-flow Inflow Model Including Wake Distortion and Contraction
… theory) to full finite-state models derived from potential flow theory by a formal Galerkin method. These models are widely used in industry, but still have some drawbacks that need to be remedied. These drawbacks include: 1.) lack of good convergence both on the disk and off the disk (one can use …
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A potential flow model for separated flow around airfoils
… work has been done on the wake source model, a potential flow model for steady separated flow. This work includes some modifications to the model and applications to new geometries. In the wake source model, the body of interest is conformally mapped to a circle. In the transform plane, …
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A Potential Flow Model of a Fire Sprinkler Head
… and instead describes the sheet formation as a potential flow boundary value problem, utilizing a free surface formulation and the superposition of the Green's function. The resulting model allows for the determination of the complete flow field over a fire sprinkler head of arbitrary geometry …
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Application of the Finite-Element Method to Potential Flow Problems
Made available in DSpace on 2014-12-14T04:42:02Z (GMT). No. of bitstreams: 1 7709070.pdf: 4296165 bytes, checksum: 7a7da126fda71bec912f78a4b693756d (MD5) Previous issue date: 1976
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Potential flow solution and incompressible boundary layer for a two-dimensional cascade
… distributions on the rotor blade of an axial-flow compressor. The shape of the blade has been approximated in two different ways employing a rather elaborate method and one whose primary goal was simplicity. The ensuing velocity distributions were compared and can be judged to be satisfactory …
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Prediction of propulsor-induced maneuvering forces using a coupled viscous/potential-flow method for integrated propulsors
… applicability to model highly contracting stern flows associated with integrated propulsors. Integrated propulsors exhibit strong coupling of the various blade-rows and duct, if present, to the vehicle stern. The method developed herein provides a robust means to analyze propulsor-induced …
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Determination of the virtual mass of the Akron due to the potential flow of air about it
Thesis: B.S., Massachusetts Institute of Technology, Department of Aeronautical Engineering, 1932
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Comparison of RANS and Potential Flow Force Computations for the ONR Tumblehome Hullfrom in Vertical Plane Radiation and Diffraction Problems
… is applied as a RANS solver for comparison with potential flow methods in the calculation of vertical plane radiation and diffraction problems. A two-dimensional rectangular cylinder oscillating in an unbounded fluid is first considered, and the added mass result shown to agree well with the …
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Numerical Modeling of Lifting Flows in the Presence of a Free Surface
… model hydrodynamics problems involving lifting flows. The method employed to solve the problem is potential flow theory.</p> <p>Despite the fast evolution of computers and the latest developments in Navier-Stokes solvers, such as the Ranse methods; potential flow theory offers the possibility to …
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An analysis method for the viscous/inviscid flow around two dimensional multi-element aerofoils including surface roughness effects
… numerical solution of the incompressible, steady flow around two dimensional multi-element aerofoils having a rough or smooth surface.The potential flow over the aerofoil is solved by replacing the aerofoil contour with a polygon of plane panels and using linear distributed vorticity on the panels …
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Tip leakage flow in a linear turbine cascade
… was performed to study the details of flow in the tip clearance gap of a linear turbine blade cascade. The cascade was designed and built to be geometrically similar to the earlier VPI&SU cascade; however, the new cascade also had a tip gap (2.1 percent of blade height) and two endwall …
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Application of Finite-State Wake Models to Rotors Re-entering Their Own Wake
… thrust was evaluated under assumptions of axial flow and potential flow theory. Results consist of computations of the inflow velocity for this case, along with comparison to closed-form, potential flow solutions for validation. The finite-state model is shown to converge with the closed-form …
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On the application of variational mechanics in modeling the flow around a cylinder in ground effect
For high Reynolds number flow over a cylinder near a flat moving surface, a potential flow model can be used to represent flow over the leading edge. However, the potential flow solution requires knowledge of the circulation around the cylinder. This circulation value can be found with an auxiliary …
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Trailing Edge Flow Conditions as a Factor in Airfoil Design
… to the design of single-element airfoils using potential flow methods are presented. In particular, the role played by the non-dimensional trailing edge velocity in design is considered and the relationship between the specified value and the resulting airfoil geometry is explored. In addition, …
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Investigation on weakly curved counterflow diffusion flames at infinitely fast chemistry
We investigate the behavior of a counterflow diffusion flame subject to a flow field comprising of a first order potential flow superimposed on a weak second order correction to the potential flow. An Arrhenius one-step irreversible reaction model at infinite Damkohler number and constant density …
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Studies on counterflow diffusion flames
Certain aspects of counterflow diffusion flames are addressed in the context of one-step Arrhenius-type global chemical reaction. The general Large-activation-energy asymptotic theory for diffusion flames is first revised and then applied to one dimensional counterflow diffusion flames with finite …
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An unsteady, accelerated, high order panel method with vortex particle wakes
Potential flow solvers for three dimensional aerodynamic analysis are commonly used in industrial applications. The limitation on the number of discretization elements and the user expertise and effort required to specify the wake location are two significant drawbacks preventing the even more …
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