... cylinder reduction bionic cylinder airfoil cylinder noise numerical simulation resistance experiment bionic model equation reservoir simulation Numerical Simulation and Experimental Study on Drag Reduction of Circular Cylinder Using Bionic Method Cong Chen, Cheng Zhao, Tao Zhang*, Zixian Cui...

... ABSTRACT A set of nonlinear wave equations based on the acoustic perturbation theory in the frequency domain is developed to simulate vortex-sound interaction and analyze acoustic scattering phenomena from the underwater vortical flow over an airfoil. The vortex can influence the propagation...

... presents the design methodology of multiple airfoils blade based on the blade element momentum theory and the map of the lift and drag coefficients. Then, compared with the single airfoil blade in numerical simulation, the thrust value of the multiple airfoils blade is closer to the target value...

... Application of Acoustic Metamaterials in Underwater Airfoil Structure Xiaoliang Zhang1, Jiaxing Zhou2, Yongou Zhang2, Tao Yan1 1. System Engineering Research Institute of CSSC. Beijing, China 2. School of Transportation, Wuhan University of Technology Wuhan, Hubei Province, China ABSTRACT...

... of an airfoil promote instabilities and that the bubbles appear more upstream or more downstream than for the corresponding case of a steady AOA . Moreover, frequencies decrease or increase during pitch-down and pitch-up motions, and transition occurs together with the formation of uniformly distributed...

... airfoil form drag coefficient riblet surface direct calculation shear stress distribution calculation shear stress upstream oil & gas attack angle flow field scalloped riblet riblet coefficient mesh drag reduction simulation three-dimensional riblet drag coefficient Drag...

... using low Reynolds number airfoil. However, the design procedures they had mentioned are not enough to guild designing an eligible model blade. 403 Proceedings of the Twenty-seventh (2017) International Ocean and Polar Engineering Conference San Francisco, CA, USA, June 25-30, 2017 Copyright © 2017...

.... artificial intelligence intake engine system design efficiency blended-wing body propeller diesel engine vehicle unmanned semi-submersible vehicle semi-submersible vehicle settle depth rudder plate airfoil resistance mast waterjet rudder fuel consumption lift coefficient Design...

... method (BEM method). In order to alleviate the scaling effect, original airfoil selections of the NREL 5-MW blade cross section (DU series) are replaced by low-Reynolds number airfoil (NACA 4412). On basis of the airfoil-adjusted blade model, this paper further builds an optimization model for the rotor...

... ABSTRACT In this paper, the aeroelastic behavior of the wind turbine FFA-W3-211 two-dimensional airfoil in the dynamic stall regime has been investigated during the natural typhoon real time history. What's more, the interaction between the airfoil stall-induced vibration and the unsteady flow...

.... Meteorological data are those gathered from Murdochville's experimental site in Canada. The blade airfoil is a NACA 63 415 and the icing conditions are scaled to be simulated in the icing wind tunnel section. The results show the relation between the meteorological conditions, the ridge formed by liquid water...

...-pitch blades system can be a solution to this problem. experimental data tidal current turbine streamtube model curvature effect wind turbine investigation wind energy rotor airfoil cycloturbine renewable energy ocean energy curved flow actuator disk solidity 0 turbine...

... (WEMU) with large cross-flow water-supported rotor having rotary blades is found out. Aerodynamic coefficients of chosen airfoil of WEMU blades are derived by 3-D Navier-Stokes numerical simulation. Preliminarily calculated angles of blades' rotation are corrected after simulation of flow through...

... of Symmetrical Airfoils PART I: in Isolated Flow A. Thakker, P. Frawley and J. Daly Univers i ty o f L imer ick L imerick, I reland ABSTRACT This paper deals with the application of Computational Fluid Dynamics (CFD) to the analysis of the aerodynamic characteristics of symmetrical airfoil blades in 2...

... turbines. In this report, a new idea of a shape-controlled airfoil to be applied to turbine blade is proposed. With this flexible airfoil, blade camber can be controlled so as to optimize to inlet flow condition. In order to get a basic design data and to estimate the characteristics of the air turbine...

... ABSTRACT: Computer assisted aircraft icing forecast can take into consideration meteorological as well as aircraft specific parameters by calculating the ice accretion rate at the affected airfoils using the model of Lozowski et al. (1878). The meteorological forecast, using barocline layer...

... is obtained in bipolar cylindrical coordinates, and the numerical pseudo conformal transformation. The method applied in the present study is not only simpler than conventional numerical methods, but also considers Kutta condition. The stream lines of uniform flow past a symmetric Joukowski airfoil...

... ABSTRACT: Effectiveness of the Moving Surface Boundary-Layer Control (MSBC) in increasing lift andlor reducing drag at a subcritical Reynolds number is studied, using a two dimensional wedge shaped airfoil, a flat plate at high angles of attack, and two-dimensional prisms through...

... studies was carried out on airfoil and several other types of fairings. Normal and tangent drag coefficients were obtained for inclined faired cables, and effects on submerged depth and towing tension of the towing vehicle were calculated for the faired towing cable. 1. INTRODUCTION Fairing can reduce...