Yufeng Yao's Outputs (93)

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.

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.

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.

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

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.

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

Equations of state for 1-D modelling of ram accelerator thrust in sub-detonative propulsion mode (2010)
Journal Article

A one-dimentional performance analysis code has been developed at eh Laboratoire de Combustion et de Detonique to predict the thrust in the thermally choked ram accelerator propulsion mode. This code includes the real gas effect in steady calculation... Read More about Equations of state for 1-D modelling of ram accelerator thrust in sub-detonative propulsion mode.

The effect of variable gas property on axial turbine performance (2010)
Journal Article

Industrial gas turbine flow has been evaluated by using computational fluid dynamics with a variable gas property model. The study of a three-stage turbine model has revealed some considerable variable gas property effects on the engine performance.... Read More about The effect of variable gas property on axial turbine performance.

Equations of state for 1-D modelling of ram accelerator thrust in thermally choked propulsion mode (2010)
Journal Article

A one-dimensional performance analysis code has been developed at the Laboratoire de Combustion et de Détonique to predict the thrust in the thermally choked ram accelerator propulsion mode. This code includes the real gas effect in steady state calc... Read More about Equations of state for 1-D modelling of ram accelerator thrust in thermally choked propulsion mode.

One-dimensional performance modelling of the ram accelerator in sub-detonative regime (2010)
Journal Article

A one-dimensional performance analysis code has been developed at the ”Laboratoire de Combustion et de D´etonique” to predict the thrust in the thermally choked ram accelerator propulsive mode. This research code incorporates the following equations... Read More about One-dimensional performance modelling of the ram accelerator in sub-detonative regime.

The effect of hole shape on blade cooling effectiveness (2010)
Journal Article

The high temperature conditions under which turbine blades operate pose a constraint on their service lifetime. One industrial solution is to apply the film cooling and the cooling effectiveness is generally determined by flow conditions, cooling hol... Read More about The effect of hole shape on blade cooling effectiveness.

Numerical simulation of heat transfer in rectangular microchannel (2009)
Journal Article

Numerical simulation of heat transfer in a high aspect ratio rectangular microchannel with heat sinks has been conducted, similar to an experimental study. Three channel heights measuring 0.3 mm, 0.6mmand 1mmare considered and the Reynolds number var... Read More about Numerical simulation of heat transfer in rectangular microchannel.

Direct simulation of flow interactions in multiple jets in cross-flow (2009)
Journal Article

Numerical investigation of system pressure effect on heat transfer of supercritical water flows in a horizontal round tube (2008)
Journal Article

The system pressure effect on heat transfer of supercritical water (SCW) flows in a horizontal round tube has been studied by using computational fluid dynamics (CFD) technique, aiming for extending previous researches on the buoyancy effect by furth... Read More about Numerical investigation of system pressure effect on heat transfer of supercritical water flows in a horizontal round tube.

Numerical visualization of vortex flow behavior in square jets in cross-flow (2008)
Journal Article

Direct numerical simulations have been performed in this study to visualize the flow behavior of single and multiple square jets issuing normally into a cross-flow. Three configurations are considered, a single jet located in the centre of the domain... Read More about Numerical visualization of vortex flow behavior in square jets in cross-flow.