A5026519837- Combustion and flame dynamics
- Heat transfer and supercritical fluids
- Advanced Combustion Engine Technologies
- Computational Fluid Dynamics and Aerodynamics
- Titanium Alloys Microstructure and Properties
- Aluminum Alloys Composites Properties
- Phase Equilibria and Thermodynamics
- Advanced materials and composites
- Fusion materials and technologies
- Rocket and propulsion systems research
- Nuclear Materials and Properties
- Metallurgical Processes and Thermodynamics
- Image and Video Quality Assessment
- Additive Manufacturing Materials and Processes
- Multimedia Communication and Technology
- Solidification and crystal growth phenomena
- Energetic Materials and Combustion
- Iron and Steelmaking Processes
- Particle Dynamics in Fluid Flows
- Fluid Dynamics and Vibration Analysis
- Geomechanics and Mining Engineering
- Fluid Dynamics and Turbulent Flows
- Video Coding and Compression Technologies
- Railway Engineering and Dynamics
- Microstructure and mechanical properties
Shanghai Jiao Tong University
2019-2023
Tsinghua University
2021-2022
Queensland University of Technology
2013
Pennsylvania State University
2002-2012
The evolution of a cryogenic fluid jet initially at subcritical temperature and injected into supercritical environment, in which both the pressure exceed thermodynamic critical state, has been investigated numerically. model accommodates full conservation laws real-fluid thermodynamics transport phenomena. All thermophysical properties are determined directly from fundamental theories, along with use corresponding state principles. Turbulence closure is achieved using large-eddy-simulation...
ABSTRACT This paper provides an overview of recent advances in the theoretical modeling and numerical simulation cryogenic fluid injection mixing transcritical supercritical environments. The basis analysis is a general framework that accommodates full conservation laws real-fluid thermodynamic transport phenomena. All thermophysical properties are determined directly from fundamental thermodynamics theories, along with use corresponding-state principles. Turbulence closure achieved using...
A comprehensive numerical analysis has been conducted to explore the development of liquid-oxygen (LOX) flow in pressure swirl injectors operating at supercritical pressures. The model is based on full-conservation laws and accommodates real-fluid thermodynamics transport phenomena over entire range fluid states concern. Three different regimes with distinct characteristics, developing, stationary, accelerating regimes, are identified within injector. Results compared predictions from...
An improved preconditioning scheme incorporating a unified treatment of general fluid thermodynamics is developed for treating flows over the entire regime thermodynamic states at all speeds. All and numerical properties (such as eigenvalues Jacobian matrices) are derived directly from fundamental theories, rendering self-consistent robust algorithm. Further efficiency obtained by employing temperature instead enthalpy primary dependent variable in preconditioned energy equation. No...
Insulated rail joints are designed in a similar way to butt jointed steel structural systems, the difference being purpose made gap between main members maintain electrical insulation for proper functioning of track circuitry at all times train operation. When loaded wheels pass gap, they induce an impact loading with corresponding strains railhead edges exceeding plastic limit significantly, which lead metal flow across thereby increasing risk short circuiting and impeding signalling broken...
Abstract Characteristic boundary conditions that are capable of handling general fluid mixtures flow at all speeds developed. The formulation is based on fundamental thermodynamics theories incorporated into an efficient preconditioning scheme in a unified manner. Local one-dimensional inviscid (LODI) relations compatible to the system proposed obtain information carried by incoming characteristic waves boundaries accurately. approach has been validated against variety sample problems broad...
The mixing and combustion of cryogenic oxygen methane in a shear coaxial injector operating under supercritical pressures are investigated numerically. formulation accommodates full conservation laws real-fluid thermodynamics transport phenomena. near -field fluid injection dynamics characterized by the evolution two layers. vigorous fluctuations generated from inner layer, which consists string large scale vortices emerging LOX post tip, provide forcing on outer layer. formations structures...
A comprehensive theoretical/numerical framework has been established to treat the combustion of liquid oxygen (LOX) and methane under supercritical conditions. The model accounts for detailed LOX/methane reaction mechanisms, accommodates effect scalar dissipation on finite-rate chemistry. Turbulence closure is achieved by a large-eddy simulation technique. Several different turbulent models are implemented assessed comparing chemical turbulence time scales at conditions typical...
The present study explores the effects of externally imposed excitations on cryogenic fluid dynamics pressure swirl injectors at supercritical conditions. external forcing is through periodic oscillations mass flow rate injector tangential inlet over a broad band frequencies. field evolution, film thickness, and spreading angle nozzle exit, are investigated compared with results obtained from without forcing. indicate that low frequency in coherent structures forcing, whereas very...
The mixing and combustion of liquid oxygen (LOX) gaseous methane a shear coaxial injector operating under supercritical pressures have been numerically investigated. near field flow flame dynamics are examined in depth, with emphasis placed on the stabilization mechanisms. model accommodates full conservation laws real-fluid thermodynamics transport phenomena over entire range fluid states concern. Turbulence closure is achieved using large-eddy-simulation technique. flowfield characterized...
Abstract A comprehensive framework has been established for studying laminar counterflow diffusion flames general fluids over the entire regime of thermodynamic states. The model incorporates a unified treatment fundamental and transport theories into an existing flow solver DMCF to treat detailed chemical kinetic mechanisms multispecies transport. resultant scheme can thus be applied in any state. Both subcritical supercritical conditions are considered. As specific example, diluted...