Yufeng Yao's Outputs (185)

Simulation and modelling of turbulent trailing-edge flow (2002)
Journal Article

Direct numerical simulation of turbulent trailing-edge flow with base flow control (2002)
Journal Article

Direct numerical simulation has been carried out for turbulent flow over a rectangular trailing edge at a Reynolds number of 1 × 103 (based on the freestream quantities and the trailing-edge thickness) and ratio of boundary-layer displacement thickne... Read More about Direct numerical simulation of turbulent trailing-edge flow with base flow control.

Direct numerical simulation of turbulent flow over a rectangular trailing edge (2001)
Journal Article

This paper describes a direct numerical simulation (DNS) study of turbulent flow over a rectangular trailing edge at a Reynolds number of 1000, based on the freestream quantities and the trailing edge thickness h; the incoming boundary layer displace... Read More about Direct numerical simulation of turbulent flow over a rectangular trailing edge.

High order resolution and parallel implementation on unstructured grids (1996)
Thesis

Assessment of the low-dissipation monotonicity-preserving scheme in a series of DNS of shock-wave/turbulent boundary layer interactions
Presentation / Conference Contribution

The seventh-order low-dissipation monotonicity-preserving scheme developed by Fang et al. (Journal of Scientific Computing, 2013, 56:67-95) was assessed in direct numerical simulations (DNS) of isotropic turbulence and channel flow. The influence of... Read More about Assessment of the low-dissipation monotonicity-preserving scheme in a series of DNS of shock-wave/turbulent boundary layer interactions.

Aeroacoustics investigation of a harmonically morphing trailing edge flap
Presentation / Conference Contribution

In this paper, an aeroacoustic study of a NACA 0012 airfoil fitted with a morphing Trailing Edge Flap (TEF) was performed at conditions of an Angle of Attack (AoA) = 4º, Reynolds number = 0.62×10^6 and Mach number = 0.11. A modified parametrization m... Read More about Aeroacoustics investigation of a harmonically morphing trailing edge flap.

Large-eddy simulation of shock-induced flow separation control using SparkJet concept
Presentation / Conference Contribution

Large-Eddy Simulation (LES) of shock-wave/boundary layer interactions (SWBLI) with SparkJet control technique is carried out in this paper. The base flow is an oblique shock-wave generated by an 8°wedge impinging onto a spatially-developing Mach 2.3... Read More about Large-eddy simulation of shock-induced flow separation control using SparkJet concept.

Numerical investigation on two streamline-traced busemann inlet-isolators
Presentation / Conference Contribution

This paper presents a computational fluid dynamics (CFD) study of flow characteristics within three-dimensional Busemann inlet with isolator models. The primary aim of the study was to compare various performances between two streamline-traced inlets... Read More about Numerical investigation on two streamline-traced busemann inlet-isolators.

Multistep simulation for three-dimensional ice accretion on an aircraft wing
Presentation / Conference Contribution

A simplified icing model combined with Eulerian two-phase flow theory has been proposed and the method was employed for direct simulation of ice accretion occurred on an aircraft wing. An innovative wall boundary condition treatment has been proposed... Read More about Multistep simulation for three-dimensional ice accretion on an aircraft wing.

Analysis of a 3D unsteady morphing wing with seamless side-edge transition
Presentation / Conference Contribution

© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. In this paper, a comparative study between a NACA 0012 rectangular wing with a statically morphed Trailing Edge Flap (TEF) and the same wing with a hinged flap... Read More about Analysis of a 3D unsteady morphing wing with seamless side-edge transition.

Aerodynamic analysis of a harmonically morphing flap using a hybrid turbulence model and dynamic meshing
Presentation / Conference Contribution

© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. A numerical study of the NACA 0012 airfoil fitted with a harmonically morphing trailing edge flap (TEF) is performed at an angle of attack of 4º and a Reynolds... Read More about Aerodynamic analysis of a harmonically morphing flap using a hybrid turbulence model and dynamic meshing.

A review of current technical development in vertical axis wind turbine technologies and their braking system for low speed, urban and offshore areas application
Presentation / Conference Contribution

Recently, there are growing interests of using Vertical Axis Wind Turbine (VAWT) to harvest wind energy from low wind speed in urban areas to relatively high wind speed in offshore wind farms. Horizontal Axis Wind Turbine (HAWT) has been known to hav... Read More about A review of current technical development in vertical axis wind turbine technologies and their braking system for low speed, urban and offshore areas application.

Comparative study on pole placement controller design with U-Model approach & classical approach
Presentation / Conference Contribution

© 2016 TCCT. As a universal framework, U-model has established an enabling design prototype for the control of non-linear dynamic plants with concise and applicable linear approaches. This study is devoted to a remaining fundamental research question... Read More about Comparative study on pole placement controller design with U-Model approach & classical approach.

Flow response to rapid morphing flap deflection
Presentation / Conference Contribution

Flow response to rapid morphing flap deflection is
investigated at a Reynolds number based on chord of
0.62×10^6 for a 2D NACA 0012 airfoil fitted with a
morphing Trailing-edge flap (TEF) at a range of angles
of attack and morphing frequencies. T... Read More about Flow response to rapid morphing flap deflection.

U-model enhanced control of nonminimum-phase dynamic systems
Presentation / Conference Contribution

In this study, U-model based control system design methodology is expanded into control of nonminimum-phase (NMP) dynamic systems. With U-model framework, a desired minimum-phase (MP) plant is established, which forms as a generic prototype. To achie... Read More about U-model enhanced control of nonminimum-phase dynamic systems.

Large-eddy simulation of MVG controlled oblique Shockwave/Boundary layer interaction
Presentation / Conference Contribution

© 2017 by Guang Yang, Beihang University, Beijing, China. Shock wave boundary layer interaction is an ubiquitous and important phenomenon in supersonic and hypersonic flow scheme. In this paper, a Mach 2.5 supersonic boundary layer impinged by an obl... Read More about Large-eddy simulation of MVG controlled oblique Shockwave/Boundary layer interaction.

CFD simulation of three-straight-bladed vertical axis wind turbine at low tip speed ratios
Presentation / Conference Contribution

This paper presents computational fluid dynamics (CFD) simulations of a three-straight-bladed Vertical Axis Wind Turbine (VAWT) operating at a wind speed of 9 m/s and low Tip Speed Ratio (TSR) ranging from 1.44 to 3.3. The turbine blade has NACA 0021... Read More about CFD simulation of three-straight-bladed vertical axis wind turbine at low tip speed ratios.

Ex-situ exafs investigation of zeolite supported pt electrocatalyst structure
Presentation / Conference Contribution

The electrochemical performance of zeolite supported 1.5 wt% Pt electrocatalyst in fuel cell has been discussed in previous studies [1, 2]. This work will focus on investigating the influence of Pt loading and Pt deposition methods on Pt electrochemi... Read More about Ex-situ exafs investigation of zeolite supported pt electrocatalyst structure.

Large-scale secondary vortices in the turbulent channel flow induced by active wall actuations
Presentation / Conference Contribution

Direct numerical simulations (DNS) of the turbulent channel flow with spanwise alternatively distributed out-of-phase (OP) and in-phase (IP) wall actuations strips (SADS) are conducted to investigate the characteristics of the large-scale streamwise... Read More about Large-scale secondary vortices in the turbulent channel flow induced by active wall actuations.

Zeolite supported Pd electrocatalyst nano-particle characterization
Presentation / Conference Contribution

Palladium (Pd) as one of platinum (Pt) group metals has
attracted significant attentions since it has shown good
activities for hydrogen reaction (HOR) and oxygen
reduction reaction (ORR) in fuel cell application and high
solubility and mobility... Read More about Zeolite supported Pd electrocatalyst nano-particle characterization.