Results 91 to 100 of about 31,802 (273)

A New Actuator Surface Model with Improved Wake Model for CFD Simulations of Rotorcraft [PDF]

, 2017
Simulations of rotorcraft operating in unsteady flow-fields, manoeuvring flight, or with complex rotor configurations pose a significant challenge to current simulation methods.
Barakos, Geogre, Linton, Daniel, Thornbern, Ben, Widjaja, Ronny   +3 more
core  

Application of High‐Order Direct Flux Reconstruction and Stiffness‐Resilient Time Integration to Simulations of Idealized Atmospheric Flows

International Journal for Numerical Methods in Fluids, EarlyView.
The proposed work implements a direct flux reconstruction method for spatial discretization and a stiffness‐resilient exponential time integration method for temporal discretization on the cube‐sphere grid. A space‐time tensor formalism is employed to provide a general representation in any curvilinear coordinate system. This combination enables highly
Stéphane Gaudreault, Christopher Subich, Shoyon Panday, Martin Charron, Vincent Magnoux, Valentin Dallerit, Mayya Tokman   +6 more
wiley   +1 more source

Delayed Detached-Eddy Simulations of Aerodynamic Variability During Carrier-Based Aircraft Landing with a Domain Precursor Inflow Method

Journal of Marine Science and Engineering
Flight tests and wind tunnel experiments face difficulties in investigating the impact of aircraft carrier air-wake on the landing process. Meanwhile, numerical methods generally exhibit low overall computational efficiency in solving such problems.
Jiawei Fu, Ruifan Hu, Hong Wang, Ke Xu, Shuling Tian   +4 more
doaj   +1 more source

Unsteady aerodynamics modeling using Volterra series expansed by basis function

MATEC Web of Conferences, 2018
Unsteady aerodynamics modeling must accurately describe nonlinear aerodynamic characteristics in addition to unsteady aerodynamic characteristics. The Volterra series has attracted increasing attention as a powerful tool for nonlinear system modeling. It
Chen Senlin, Gao Zhenghong
doaj   +1 more source

Unsteady transonic viscous-inviscid interaction using Euler and boundary-layer equations [PDF]

The Euler code is used extensively for computation of transonic unsteady aerodynamics. The boundary layer code solves the 3-D, compressible, unsteady, mean flow kinetic energy integral boundary layer equations in the direct mode.
Pirzadeh, Shahyar, Whitfield, Dave
core   +1 more source

Polymer Stress‐Tensor Calculation for a Laminar Submerged Viscoelastic Jet Flow Using Different Constitutive Models

International Journal for Numerical Methods in Fluids, EarlyView.
This study presents an efficient method to compute polymer stress‐tensor components in viscoelastic laminar jet flows using models such as Oldroyd‐B, Giesekus, PTT, and FENE. By assuming a stationary and parallel flow, the methodology significantly reduces computational cost.
Rafael de Lima Sterza, Leandro Franco de Souza, Marcio Teixeira de Mendonca, Analice Costacurta Brandi   +3 more
wiley   +1 more source

The influence of unsteady aerodynamics on hingeless rotor ground resonance [PDF]

Calculations of the model frequency and damping for a hingeless rotor on a gimballed support in hover are compared with measured results for two configurations (differing in blade flap stiffness). Good correlation is obtaned when an inflow dynamics model
Johnson, W.
core   +1 more source

Numerical investigation of the effects of pedestrian barriers on aeroelastic stability of a proposed footbridge [PDF]

, 2004
A numerical investigation into the aerodynamic characteristics and aeroelastic stability of a proposed footbridge across a motorway in the north of England has been undertaken.
Salisbury, I, Taylor, I. J., Vezza, M.
core   +2 more sources

CFD Analysis of Dual‐Layer PCM Roofs for Thermal Mitigation in Residential Buildings

Heat Transfer, EarlyView.
ABSTRACT This study presents a computational fluid dynamics analysis of dual‐layer phase change material (PCM) roofs for passive cooling in residential buildings under the hot and humid climate of Bangladesh. A three‐dimensional transient model was developed in ANSYS Fluent using the enthalpy–porosity approach to simulate coupled heat conduction ...
Mohammad Junaid, Sakhawat Hossan Robel, Mahmud Or‐Rashid, Pabel Shahrear, Md Shajedul Karim, Suvash C. Saha, Goutam Saha   +6 more
wiley   +1 more source

Aeroelastic modeling for the FIT (Functional Integration Technology) team F/A-18 simulation [PDF]

As part of Langley Research Center's commitment to developing multidisciplinary integration methods to improve aerospace systems, the Functional Integration Technology (FIT) team was established to perform dynamics integration research using an existing ...
Wieseman, Carol D., Zeiler, Thomas A.
core   +1 more source