All Outputs (62)

Large-scale Secondary Vortices Generated by Wall Actuations: Application to the Turbulent Channel Flow (2017)
Presentation / Conference
Actuations: Application to the Turbulent Channel Flow. Paper presented at Parallel CFD Conference 2017, Glasgow, UK

The large-scale streamwise vortex (LSSV) generation mechanism in the turbulent boundary layer is closely linked to the turbulent mixing process and its potential to suppress flow separation. Direct numerical simulations (DNSs) of weakly compressible... Read More about Large-scale Secondary Vortices Generated by Wall Actuations: Application to the Turbulent Channel Flow.

Unsteady parametrization of a morphing wing design for improved aerodynamic performance (2017)
Presentation / Conference
Abdessemed, C., Yao, Y., Narayan, P., & Bouferrouk, A. (2017, March). Unsteady parametrization of a morphing wing design for improved aerodynamic performance. Paper presented at 52nd 3AF International Conference on Applied Aerodynamics, Lyon, France

A morphing wing is a bio-inspired concept where all moving parts e.g. slats/flaps are replaced with a deformable body. This paper describes a methodology that uses modified parametrization methods to define a morphing geometry, and applies user-defin... Read More about Unsteady parametrization of a morphing wing design for improved aerodynamic performance.

DES prediction of a 3-element high-lift airfoil with a blown flap (2017)
Presentation / Conference
Ouyang, B., Yao, Y., & Bouferrouk, A. (2017, March). DES prediction of a 3-element high-lift airfoil with a blown flap. Presented at 52nd 3AF International Conference on Applied Aerodynamics, Lyon, France

Over the last 20 years, research on aerodynamic flow control methods has received considerable attention due to its ability to improve aircraft aerodynamic performance beyond current capabilities (Ternoy et al., 2013). It is evident that a successful... Read More about DES prediction of a 3-element high-lift airfoil with a blown flap.

U-model enhanced control of nonminimum-phase dynamic systems (2016)
Presentation / Conference
Qiu, J., Zhu, Q., Nibouche, M., & Yao, Y. (2016, November). U-model enhanced control of nonminimum-phase dynamic systems. Paper presented at 8th International Conference on Modelling, Identification and Control (ICMIC-2016), Algiers, Algeria

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.

Numerical investigation of wavy-annular airwater two-pase flow in a small horizontal pipe (2016)
Presentation / Conference
Arini, A., Yao, J., Gordon, T., & Yao, Y. (2016, September). Numerical investigation of wavy-annular airwater two-pase flow in a small horizontal pipe. Paper presented at EFCM11 11th European Fluid Mechanics Conference, Seville, Spain

This study has been carried out using Computational Fluid Dynamics (CFD) to investigate the annular two phase flow behavior that flow pattern has some desirable features for renewable energy system application. The circumferential distribution of t... Read More about Numerical investigation of wavy-annular airwater two-pase flow in a small horizontal pipe.

Shock-wave/boundary layer interaction control using spark-jet and micro-vortex generator (2016)
Presentation / Conference
Fang, J., Yang, G., Yao, Y., Liu, C., & Lu, L. (2016, September). Shock-wave/boundary layer interaction control using spark-jet and micro-vortex generator. Poster presented at UKTC Annual Workshop, Cambridge, UK

We present Large-Eddy Simulation of two control devices: active control by SparkJet and passive control by MVG. It is found that both methods can greatly alleviate the separation. Flowfield analysis shows that the streamwise counter-rotating vortex g... Read More about Shock-wave/boundary layer interaction control using spark-jet and micro-vortex generator.

On the effect of the distance between longitudinally ridged walls in a turbulent channel flow (2016)
Presentation / Conference
Castagna, J., & Yao, Y. (2016, September). On the effect of the distance between longitudinally ridged walls in a turbulent channel flow. Poster presented at UKTC Annual Workshop, Cambridge, UK

Direct numerical simulation (DNS) of a turbulent channel flow with longitudinally rigid walls set at different distances has been carried out and results are analyzed and presented, together with findings and observations.

Large-scale turbulent secondary flows induced by spanwise alternatively distributed strips control (2016)
Presentation / Conference
Ni, W., Fang, J., Yao, Y., Moulinec, C., & Lu, L. (2016, September). Large-scale turbulent secondary flows induced by spanwise alternatively distributed strips control. Poster presented at UKTC Annual Workshop, Cambridge, UK

In this study, direct numerical simulations (DNS) of a weakly compressible turbulent channel flow with Spanwise Alternatively Distributed Strips (SADS) control are conducted to investigate the characteristics of the LSSV induced by small-scale wall a... Read More about Large-scale turbulent secondary flows induced by spanwise alternatively distributed strips control.

DES prediction of a novel high-lift device step 1: Steady blowing (2016)
Presentation / Conference
Ouyang, B., Yao, Y., & Bouferrouk, A. (2016, July). DES prediction of a novel high-lift device step 1: Steady blowing. Poster presented at 2016 Applied Aerodynamics, Bristol, UK

This presentation focus on my recent results from year one. I.E. Identify the best CFD method to use with high-lift devices and apply flow control to improve performance.

Development and testing of a variable camber morphing wing mechanism (2016)
Presentation / Conference
Evans, C., Harmer, M., Marks, O., Tiley, S., Willis, T., Bouferrouk, A., & Yao, Y. (2016, May). Development and testing of a variable camber morphing wing mechanism. Paper presented at International Symposium of Sustainable Aviation, Istanbul, Turkey

The aim of this study was to develop, build and test a morphing wing design in a low-speed wind tunnel to demonstrate its viability as a practical morphing mechanism. The original concept this study is based upon is so-called the Direct Control Airfo... Read More about Development and testing of a variable camber morphing wing mechanism.

DES prediction of near stall performance of a high lift airfoil (2016)
Presentation / Conference
Ouyang, B., Yao, Y., & Bouferrouk, A. (2016, May). DES prediction of near stall performance of a high lift airfoil. Paper presented at International Symposium of Sustainable Aviation, Istanbul, Turkey

CFD analyses using Detached Eddy Simulation (DES) and Reynolds-Averaged Navier-Stokes (RANS) techniques are conducted on a two-element NLR 7301 airfoil configuration at take-off flow conditions to predict its near stall aerodynamic performance. Meshi... Read More about DES prediction of near stall performance of a high lift airfoil.

Large-eddy simulation of shock-induced flow separation control using SparkJet concept (2016)
Presentation / Conference
Yang, G., Yao, Y., Fang, J., Gan, T., & Lu, L. (2016, January). Large-eddy simulation of shock-induced flow separation control using SparkJet concept. Paper presented at 54th AIAA Aerospace Sciences Meeting, San Diego, California, USA

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.

Multistep simulation for three-dimensional ice accretion on an aircraft wing (2016)
Presentation / Conference
Huang, J., Cao, Y., Yao, Y., & Yao, J. (2016, January). Multistep simulation for three-dimensional ice accretion on an aircraft wing. Paper presented at 54th AIAA Aerospace Sciences Meeting, San Diego, California

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.

Numerical investigation on two streamline-traced busemann inlet-isolators (2016)
Presentation / Conference
Xing, F., Xiaoyuan, F., Can, L., & Yao, Y. (2016, January). Numerical investigation on two streamline-traced busemann inlet-isolators. Paper presented at 54th AIAA Aerospace Sciences Meeting, San Diego, California, USA

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.

Large-eddy simulation of a three-dimensional shock-wave/turbulent boundary layer interaction of a single-fin (2015)
Presentation / Conference
Fang, J., Yao, Y., Zheltovodov, A. A., & Lu, L. (2015, September). Large-eddy simulation of a three-dimensional shock-wave/turbulent boundary layer interaction of a single-fin. Paper presented at UKTC Annual Workshop, Southampton, UK

The three-dimension (3D) shock-wave/turbulent boundary layer interaction (SWTBLI) raised from a hypersonic flow passing a single-fin at Mach 5 is investigated i by using LES. The performed LES has demonstrated very good agreements with available expe... Read More about Large-eddy simulation of a three-dimensional shock-wave/turbulent boundary layer interaction of a single-fin.

CFD of air/water two-phase flow in small horizontal pipe (2015)
Presentation / Conference
Yao, J., & Yao, Y. (2015, July). CFD of air/water two-phase flow in small horizontal pipe. Paper presented at The First Chinese International Conference on CFD, Mianyang, China

Computational Fluid Dynamics (CFD) has been applied to investigate air/water two-phase flow characteristics in an 8.8mm I.D small horizontal pipe. Simulation has successfully predicted water film thickness using newly developed user defined wave func... Read More about CFD of air/water two-phase flow in small horizontal pipe.

DNS of transitional and turbulent flow simulations (2015)
Presentation / Conference
Yao, Y., & Zheng, Y. (2015, July). DNS of transitional and turbulent flow simulations. Presented at The First Chinese International Conference on CFD, Mianyang, China

An in-house direct numerical simulation (DNS) code SBLI has been developed and used extensively for high-performance computation (HPC) of transitional and turbulent flows, most related to shock/boundary-layer interaction problems. The code has also p... Read More about DNS of transitional and turbulent flow simulations.

Assessment of the low-dissipation monotonicity-preserving scheme in a series of DNS of shock-wave/turbulent boundary layer interactions (2015)
Presentation / Conference
Fang, J., Yao, Y., & Lu, L. (2015, January). Assessment of the low-dissipation monotonicity-preserving scheme in a series of DNS of shock-wave/turbulent boundary layer interactions. Paper presented at The 9th International Conference on Computational Physics (ICCP9), Singapore

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.

Mixing flow characteristics for a transverse sonic jet injecting into a supersonic crossflow (2015)
Presentation / Conference
Khali, E. H., & Yao, Y. (2015, January). Mixing flow characteristics for a transverse sonic jet injecting into a supersonic crossflow. Paper presented at AIAA 2015 Sci-Tech conference, Kissimmee, Florida, USA

Detached-eddy simulation (DES) of a sonic jet flow issuing perpendicularly into a supersonic crossflow is presented. The supersonic boundary layer flow has conditions of incoming Mach number 1.6 and Reynolds number Reδ 1.08×105, based on the free-str... Read More about Mixing flow characteristics for a transverse sonic jet injecting into a supersonic crossflow.

Large-eddy simulation of a three-dimensional hypersonic shock wave turbulent boundary layer interaction of a single fin (2015)
Presentation / Conference
Fang, J., Yao, Y., Zheltovodov, A. A., & Lu, L. (2015, January). Large-eddy simulation of a three-dimensional hypersonic shock wave turbulent boundary layer interaction of a single fin. Paper presented at AIAA 2015 Sci-Tech conference, Kissimmee, Florida, USA

The large-eddy simulation (LES) of a hypersonic flow passing a single-fin at Mach 5 and Re∞=3.7×107/m was conducted and the three-dimensional (3D) shock wave/turbulent boundary layer interaction (SWTBLI) was studied in the present paper. This is prob... Read More about Large-eddy simulation of a three-dimensional hypersonic shock wave turbulent boundary layer interaction of a single fin.