About
32
Publications
4,373
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
116
Citations
Introduction
Skills and Expertise
Current institution
Additional affiliations
Publications
Publications (32)
The mechanisms of direct detonation initiation (DDI) in methane/air mixtures containing coal particles are investigated through simulations conducted using the Eulerian-Lagrangian method in a two-dimensional configuration. Methane-air combustion is modelled with a detailed chemical mechanism involving 36 species and 219 reactions, while coal partic...
Liquid sprays consisting of interacting droplets with diverse compositions are prevalent in engineering applications and everyday life. Although extensive research has been conducted on multi-droplet interactions, most studies concentrate on scenarios involving identical compositions. In this study, we theoretically investigate the quasi-steady eva...
Despite extensive research on head-on droplet collisions over the past decades, detailed investigations into the bouncing behavior of high-viscosity droplets, such as molten glass droplets, are still scarce. In this study, a volume-of-fluid method coupled with dual marker functions is employed to simulate the collision dynamics of molten glass drop...
Understanding the direct initiation of detonation is crucial for developing effective detonation inhibition strategies. We numerically investigate the direct initiation of hydrogen/air detonation in a circular water cloud using the Eulerian–Lagrangian method with two-way gas–droplet coupling. Parametric analyses demonstrate that both droplet concen...
Droplet evaporation and autoignition are considerably influenced by transient gas-phase diffusion and variations in droplet temperature during the initial stage, especially under elevated pressure conditions and when substantial differences exist between the initial and equilibrium droplet temperatures. In this paper, we present a theoretical analy...
This paper presents a comprehensive theoretical analysis of the interaction between two quasi-steady burning droplets with differing temperatures, sizes and distances, building upon the mass-flux-potential model and flame-sheet assumption. In contrast to existing research, this study introduces a fresh perspective on droplet interactions by conside...
One-dimensional numerical simulations based on the hybrid Eulerian–Lagrangian approach are performed to investigate detonation dynamics in two-phase gas-droplet n-heptane/air mixtures with and without liquid fuel pre-vaporization. The reactive Navier–Stokes equations considering the two-way coupling for interphase exchanges of mass, momentum, energ...
In order to achieve high efficiency and power density, modern combustors are generally operated at elevated pressures. As the pressure and gas-phase density increase, classical quasi-steady (QS) models of droplet evaporation, ignition, and burning introduce non-negligible errors. In this paper, we extend the QS model to incorporate the gas-phase tr...
The interactions between an incident shock and a moderately dense particle curtain are simulated with the Eulerian–Lagrangian method. A customized solver based on OpenFOAM is extended with an improved drag model and collision model and then validated against two benchmark experiments. The results show that the collision model has a limited impact o...
The interactions between an incident shock and moderately dense particle curtain are simulated with the Eulerian-Lagrangian method. A customized solver based on OpenFOAM is extended with an improved drag model and collision model, and then validated against two benchmark experiments. In this work, parametric studies are performed considering differ...
![a) Experimental photograph of a blue whirl [1]; (b)
Schematic...](profile/Shangpeng-Li-2/publication/365201499/figure/fig1/AS:11431281242161401@1715414302028/a-Experimental-photograph-of-a-blue-whirl-1-b-Schematic-illustration-of-a-blue_Q320.jpg)
Blue whirls are newly discovered blue rotating flames transitioned from fire whirls generated on liquid fuel surfaces. Compared with the traditional fire whirls, blue whirls have a distinct flame structure and are almost soot-free. Studies of the blue whirl are expected to promote the development of clean combustion theory and technology. In this p...
Transmission of hydrogen detonation wave (DW) in an inert particle curtain is simulated using the Eulerian-Lagrangian approach with gas-particle two-way coupling. A detailed chemical mechanism is used for hydrogen detonative combustion and parametric studies are conducted based on a two-dimensional computational domain. A detonation map of propagat...
Understanding ignition and explosion of hydrogen induced by a hot particle is crucial for the safety of hydrogen storage, transmission and utilization. In this paper, the ignition/explosion of hydrogen/air mixtures...
Stabilization of the flame base at the bottom Ekman boundary layer of the fire whirl under strong circulation is analytically and numerically studied. The problem is relevant for fire safety and the associated understanding of the generation mechanism of the newly discovered whirling flame, the so-called blue whirl. Based on the dynamic balance of...
The steady burning and stabilization of the boundary layer diffusion flame over a gasifying condensed fuel surface, commonly called the Emmons flame, is an important problem in the study of boundary layer combustion. We investigate herein, theoretically and numerically, the liftoff distance and blowout limit of the Emmons flame, through the corresp...
While the presence of an impermeable leading segment is normally inevitable for a boundary layer diffusion flame established over a fuel surface, it also offers an opportunity to control and stabilize the flame by design. In this study, the classical Emmons' problem with an impermeable leading section is investigated numerically and theoretically....
The bottom boundary layer of a fire whirl over a fuel pool is coupled to the outer rotating flow, the vaporization process, and the subsequent diffusional burning in the gas. As such, it plays an essential role in the dynamics of the fire whirl, particularly the resulting burning rate and flame height. In this paper, the bottom boundary-layer struc...
![Fig. 2. (a) Comparison of the experimental [14] ("o" symbols) and...](profile/Shangpeng-Li-2/publication/328188593/figure/fig2/AS:705167867527169@1545136529666/a-Comparison-of-the-experimental-14-o-symbols-and-computed-x-symbols-ignition_Q320.jpg)
The non-monotonic ignition response of counterflowing premixed hydrogen/oxygen mixtures with nitrogen dilution versus heated nitrogen is studied numerically and theoretically. It is shown that the three ignition limits can be theoretically obtained by considering only the linear system involving at most only one radical in each reaction, while the...
The thermal ignition of a reacting boundary-layer flow over the hot surface of a wedge/cone with an unheated starting length, , is studied analytically and numerically. For the realistic situation of large activation energy reactions, a locally similar solution is derived and is found to agree well with the numerical solution within a wide range of...
The problem of thermal-ignition on a boundary-layer at a hot plate with an unheated inlet has been considered, and a local similar solution is derived. An explicit expression for the minimum ignition distance has been derived by using matched asymptotic analysis in the realistic limit of large activation energy. The unheated inlet section can reduc...
