Yufeng Yao's Outputs (185)

Direct numerical simulation of supersonic turbulent flow in an expansion-compression corner at mach=2.9 (2014)
Presentation / Conference Contribution

Shock-wave/turbulent boundary layer interactions (SWTBLI) are prevalent phenomena in high-speed flights, which could cause large flow separation and high wall heat flux and strong pressure fluctuation, therefore, affect significantly the aero-thermod... Read More about Direct numerical simulation of supersonic turbulent flow in an expansion-compression corner at mach=2.9.

Numerical simulations of two-dimensional and three-dimensional shock wave/turbulent boundary layer interactions (2014)
Presentation / Conference Contribution

The impinging shock-wave/flat-plate boundary layer interaction is a standard CFD case for two-dimensional (2D) SWTBLI, which represents the simplest SWTBLI configuration for the validation of turbulence models and computational methods. Although plen... Read More about Numerical simulations of two-dimensional and three-dimensional shock wave/turbulent boundary layer interactions.

Direct numerical simulation of a turbulent flow over an axisymmetric hill (2014)
Journal Article

Direct numerical simulation (DNS) of a turbulent flow over an axisymmetric hill has been carried out to study the three-dimensional flow separation and reattachment that occur on the lee-side of the geometry. The flow Reynolds number is Re H=6500, ba... Read More about Direct numerical simulation of a turbulent flow over an axisymmetric hill.

Modelling conjugate flow and heat transfer in a ventilated room for indoor thermal comfort assessment (2014)
Journal Article

Conjugate natural and forced convection heat transfers in a domestic model room of finite-thickness walls and a heat source have been numerically studied. A 2-D non-ventilated square model room with a heat source is investigated at first for conditio... Read More about Modelling conjugate flow and heat transfer in a ventilated room for indoor thermal comfort assessment.

Scramjet flow and intake SBLI: Technical challenges and case study (2013)
Journal Article

This paper reviews some basic research areas associated with Scramjet-powered hypersonic flying vehicle, particularly the forebody boundary-layer transition and intake shock-wave boundary-layer interactions (SBLI). Some technical and physical challen... Read More about Scramjet flow and intake SBLI: Technical challenges and case study.

Multi-block high-order dns code development for jet in turbulent cross-flow simulation (2012)
Journal Article

A multi-block high-order finite-difference direct numerical simulation (DNS) code has been developed for studying turbulent flows over complex geometries. A global mapping technique is adopted and applied to a multi-block domain arrangement, in which... Read More about Multi-block high-order dns code development for jet in turbulent cross-flow simulation.

Numerical study of unsteady airflow phenomena in a ventilated room (2012)
Journal Article

Numerical simulation of airflow in an indoor environment has been carried out for forced, natural, and mixed convection modes, respectively, by using the computational fluid dynamics (CFD) approach of solving the Reynolds-averaged Navier-Stokes equat... Read More about Numerical study of unsteady airflow phenomena in a ventilated room.

CFD prediction and experimental measurement of blade water coverage in a diesel turbocharger (2012)
Journal Article

A turbocharger unit for diesel engine is often equipped with a built-in online water washing system and its performance is not always satisfactory because of efficiency declination due to deposit accumulated on blade surfaces not being washed away. I... Read More about CFD prediction and experimental measurement of blade water coverage in a diesel turbocharger.

Effect of jet inclination angle and hole exit shape on vortical flow structures in low-reynolds number jet in cross-flow (2012)
Journal Article

Numerical studies have been performed to visualize vortical flow structures emerged from jet cross-flow interactions. A single square jet issuing perpendicularly into a cross-flow was simulated first, followed by two additional scenarios, that is, in... Read More about Effect of jet inclination angle and hole exit shape on vortical flow structures in low-reynolds number jet in cross-flow.

Flow topology and secondary separation modelling at crossing shock wave/turbulent boundary layer interaction conditions (2012)
Journal Article

Steady RANS modelling has been carried out for a symmetrical double-sharp-fin configuration with an inclination angle 15°, Mach 3.92 and Reynolds number Reδ = 3.08 x 105. Grid refinement and turbulence model influences using ω-based Reynolds Stress m... Read More about Flow topology and secondary separation modelling at crossing shock wave/turbulent boundary layer interaction conditions.

Flow topology of symmetric crossing shock wave boundary layer interactions (2012)
Book Chapter

Three-dimensional crossing-shock-wave and turbulent boundary-layer interactions can generate intense wall heat flux rates, high pressure levels, and large-scale flow separations on high-speed vehicle surfaces. To reproduce such complex flow physics,... Read More about Flow topology of symmetric crossing shock wave boundary layer interactions.

Shock induced separating flows in scramjet intakes (2012)
Journal Article

Shock induced separating flows in a scramjet intake has been studied by using a computational fluid dynamics approach. A configuration of scramjet intake geometry consisting of two exterior compression ramps, followed by a subsequent inlet and interi... Read More about Shock induced separating flows in scramjet intakes.

Improved one-dimensional unsteady modelling of thermally choked ram accelerator in sub-detonative velocity regime (2011)
Journal Article

Improved one-dimensional unsteady modeling of thermally choked ram accelerator in subdetonative velocity regime (2011)
Journal Article

The subdetonative propulsion mode using thermal choking has been studied with a one-dimensional (1D) real gas model that included projectile acceleration. Numerical results from a control volume analysis that accounted for unsteady flow effects estab... Read More about Improved one-dimensional unsteady modeling of thermally choked ram accelerator in subdetonative velocity regime.

Direct numerical simulation of single and multiple square jets in cross-flow (2011)
Journal Article

Direct numerical simulations (DNSs) have been carried out for single and multiple square jets issuing normally into a cross-flow, with the primary aim of studying the flow structures and interaction mechanisms associated with the jet in cross-flow (J... Read More about Direct numerical simulation of single and multiple square jets in cross-flow.

Numerical simulation of convective airflow in an empty room (2011)
Journal Article

Numerical simulation of airflow inside an empty room has been carried out for a forced convection, a natural convection and a mixed convection respectively, by using a computational fluid dynamics approach of solving the Reynolds-averaged Navier-Stok... Read More about Numerical simulation of convective airflow in an empty room.

A review of novel turbocharger concepts for enhancements in energy efficiency (2011)
Journal Article

Turbochargers are extensively used throughout the automotive industry as they can enhance the output of an internal combustion (IC) engine without the need to increase its cylinder capacity. The application of such a mechanical device enables automot... Read More about A review of novel turbocharger concepts for enhancements in energy efficiency.

Numerical analysis of wall properties in crossing-shock-wave/turbulent-boundary-layer interactions (2011)
Journal Article

The effect of hole shape on blade cooling effectiveness (2011)
Journal Article

Simulation of gas-water two-phase flow in diesel turbocharger (2010)
Book Chapter