A5001986297- Computational Fluid Dynamics and Aerodynamics
- Fluid Dynamics and Turbulent Flows
- Aerodynamics and Acoustics in Jet Flows
- Combustion and flame dynamics
- Plasma and Flow Control in Aerodynamics
- Laser-Plasma Interactions and Diagnostics
- Advanced Combustion Engine Technologies
- Rocket and propulsion systems research
- Combustion and Detonation Processes
- Gas Dynamics and Kinetic Theory
- Particle Dynamics in Fluid Flows
- Cyclone Separators and Fluid Dynamics
- Advanced Aircraft Design and Technologies
- Meteorological Phenomena and Simulations
- Coal Combustion and Slurry Processing
- Fluid Dynamics and Heat Transfer
- Heat transfer and supercritical fluids
- Lattice Boltzmann Simulation Studies
Shanghai Jiao Tong University
2019-2024
The lower total temperature and pressure in a dual-mode scramjet engine lead to slower rates of evaporation chemical reactions, while the inflow velocity is higher than that ramjet engine. Consequently, enhancing fuel residence time becomes more critical challenge. cavity crucial device for time. However, quantitative capacity mechanism have not yet been revealed, especially wide-range speed conditions. This work employs delayed detached eddy simulation method investigate mass transport...
A comprehensive theoretical model for the primary breakup of liquid jets in subsonic crossflow was developed. The theoretically analyzed jet deformation process, mass stripping and influence several critical forces consequently provided highly accurate predictions trajectory. Deformation cross section considered as a two-stage process based on physical characteristics, including spring-mass analogy induced deformation. modeled an exponential function time experimental findings droplets....
The distance over which a normal shock motion passes is generally considered to be negatively correlated with the rising rate of backpressure; however, our experiments show that independent backpressure for oblique trains. Single-pulse was constructed decouple amplitude and remove its cumulative effects first time at Ma = 1.95. Unlike shock, when begins fall, train does not immediately retreat but rather moves upstream terminal position. mixing region may play an important role in this...
In the tandem turbine-based combined cycle engine's hyperburner, complex intrusive design is usually employed to achieve ignition and stable combustion under high-speed low-temperature extreme conditions. This paper proposes a concise, non-intrusive coupled swirler-cavity configuration supply fuel with good atomization at cavity-trapped vortex center, thereby ensuring formation of initial flame kernel. Under guidance vortex, kernel grows through dynamic “rotation-diffusion” mechanism....
The lift-off flow of the supersonic streamwise vortex in oblique shock-wave/jet interaction (OS/JI), extracted from a wall-mounted ramp injector scramjet, is studied through large-eddy simulation method. shocked helium jet deforms into pair with co-rotating companion vortex. trajectory center lifted by shock interaction. Based on objective coordinate system frame shock, it found that nature three-dimensional structure OS/JI inherently and precisely controlled kinetics corresponding bubble...
Multidimensional numerical simulations are performed to investigate the evolution and formation of unburned fuels for a shock–fuel jet interaction scenario. A full set Navier–Stokes equations with detailed chemical mechanisms solved, results analyzed through Lagrangian method goal improving combustion efficiency in supersonic flows. The flame morphology two-dimensional (2-D) non-premixed reactive shock–bubble is first simulated studied, which hydrogen found prevent efficient combustion. By...
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The shock train self-excited oscillation can induce combustor instabilities and reduce engine margin. In a dual-mode scramjet, the undergoes complete evolution process, exhibiting structural changes closely tied to this inherent unsteadiness. This study aims elucidate space–time diversity in mode underlying mechanisms during wide-range evolution. experimental investigations were conducted at Ma = 1.95, capturing of train. results indicate be categorized into three regimes based on...