نتایج جستجو برای: Vortex Panel Method

تعداد نتایج: 1726580  

Journal: :journal of mechanical research and application 2010
hassan ghassemi roya shademani

this paper presents numerical calculations for podded propulsion system using vortex theory and potential panel method. the method discretizes the surface boundary of the body (propeller +pod+strut) and obtained the vortex and propeller surface and potential on strut and pod. a model propeller and strut are considered for these calculations and the results of pressure distribution, flow field a...

A linear vortex panel method is extended to include the effect Abstract of ground proximity on the aerodynamic properties of two dimensional airfoils. The image method is used to model the ground effect . According to the results, lift coefficient of an airfoil may increase or decrease in ground effect based on a combinative effect of its camber, thickness, angle of attack and ground clearance....

2007
Leon Kaganovskiy Semyon M. Meerkov

A hierarchical panel method for representing vortex sheet surface motion in 3D flow is presented. Unlike previously employed filament methods, each panel is a leaf of the tree, so it can be subdivided locally, which allows an efficient adaptive point insertion. In addition, we developed curvature-based insertion criteria which allow to localize point insertion to the most complicated curved reg...

Journal: :Journal of the Japan Society for Aeronautical and Space Sciences 1992

2016
Gang Xue Yanjun Liu Muqun Zhang Hongpeng Ding

The kinematics model based on the Slender-Body theory is proposed from the bionic movement of real fish. The Panel method is applied to the hydrodynamic performance analysis innovatively, with the Gauss-Seidel method to solve the Navier-Stokes equations additionally, to evaluate the flexible deformation of fish in swimming accurately when satisfying the boundary conditions. A physical prototype...

Journal: :Journal of the Japan Society for Aeronautical and Space Sciences 1986

2014
Thiemo M. Kier

The integration of loads analysis models using so called aerodynamic influence coefficients (AICs) is described. These AICs relate a change of normal velocity at panel control points to a change in panel pressure distribution, allowing to consider aeroelastic effects in a straight forward manner. The aerodynamic method employed for aeroelastic applications is typically the Vortex or Doublet Lat...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران 1379

روشهای پانلی (panel method) از بین سایر روشهای محاسبه خصوصیات جریان سیال حول یک جسم، روشهای سریع، کارآمد و مناسبی هستندبر مبنای این روشها، نرم افزارهای متعددی نوشته شده اند که از میان آنها می توان به cmarc ، quadpan ، vsaero ، usaero و ... اشاره کرد. آنچه که در این تحقیق می آید محاسبه ضرایب آیرودینامیکی هواپیمای چهارنفره و تمام کامپوزیت فجر- 3 به کمک نرم افزار cmarc می باشد. پاسخهای به دست آمده...

2014
Peter Bosler Lei Wang Christiane Jablonowski Robert Krasny

We present a Lagrangian particle/panel method for geophysical fluid flow described by the barotropic vorticity equations on a rotating sphere. The particles carry vorticity and the panels are used in discretizing the Biot-Savart integral for the velocity. Adaptive panel refinement and a new Lagrangian remeshing scheme are applied to reduce the computational cost and maintain accuracy as the flo...

2013
G. Droandi G. Gibertini

An inviscid actuator disk model is embedded in a three-dimensional low-order panel method code for inviscid incompressible flow in order to study the propeller effects on an arbitrary body. The actuator disk model predicts the time–averaged induced velocities in the slipstream of a propeller with an arbitrary radial distribution of load. The model is constructed by superposition of four vortici...

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