Predicting the outcomes of fuel drop impact on heated surfaces using SPH simulation

Jet A-己烷二元燃料液滴撞击加热固体表面的数值研究

Numerical Investigations of Jet A Hexane Binary Fuel Droplet Impact on a Heated Solid Surface

本文采用VOF方法数值研究了Jet A-Hexane二元燃料液滴在加热固体表面的撞击动力学，揭示了燃料混合对铺展、沸腾和回弹的影响，并提出了韦伯数、铺展比与壁面热流密度的新关联式。

SPH simulation of fuel drop impact on heated surfaces

The interaction of liquid drops and heated surfaces is of great importance in many applications. This paper describes a numerical method, based on smoothed particle hydrodynamics (SPH), for simulating n-heptane drop impact on a heated surface. The SPH method uses numerical Lagrangian particles, which obey the laws of fluid dynamics, to describe the fluid flows. By incorporating the Peng-Robinson equation of state, the present SPH method can directly simulate both the liquid and vapor phases and the phase change process between them. The numerical method was validated by two experiments on drop…

SPH modeling of natural convection around a heated horizontal cylinder: A comparison with experiments

An experimental and numerical smoothed particle hydrodynamics (SPH) analysis was performed for the convective flow arising from a horizontal, thin cylindrical heat source enclosed in a glycerin-filled, slender enclosure at low Rayleigh numbers ($1.18\leq {\rm Ra}\leq 242$). Both the experiments and the SPH calculations were performed for positive ($0.1\leqΔT\leq 10$ K) and negative ($-10\leqΔT\leq -0.1$ K) temperature differences between the source and the surrounding fluid. In all cases a pair of steady, counter-rotating vortices is formed, accompanied by a plume of vertically ascending flow …

Drag of a Heated Sphere at Low Reynolds Numbers in the Presence of Buoyancy

Fully resolved simulations are used to quantify the effects of heat transfer in the presence of buoyancy on the drag of a spatially fixed heated spherical particle at low Reynolds numbers ($Re$) in the range $10^{-3} \le Re \le 10$ in a variable property fluid. The amount of heat addition from the sphere encompasses both, the heating regime where the Boussinesq approximation holds and the regime where it breaks down. The particle is assumed to have a low Biot number which means that the particle is uniformly at the same temperature and has no internal temperature gradients. Scaling buoyancy wi…

莱顿弗罗斯特条件下柴油替代燃料液滴壁面撞击中层流变薄与破碎的实验与模型辅助分析

Experimental and model-assisted analysis of lamella thinning and breakup in diesel-surrogate fuel-droplet wall impingement under Leidenfrost conditions

研究正十六烷单液滴在300 - 500°C、韦伯数5.77 - 208.61的加热不锈钢壁面上的铺展与破碎，通过高速背光图像实验并结合层流 - 边缘模型分析，结果表明模型推断的层流厚度能补充传统状态图，为破碎时间提供局部状态信息。

旋流空气雾化的高保真多尺度模拟及与实验的对比

High-Fidelity Multi-Scale Simulation of Swirled Air-blast Atomization with Comparison against Experiments

针对液体燃料雾化建模难的问题，提出基于亚格子尺度与薄结构破碎模型的多尺度多域模拟方法，对旋流同轴雾化器喷雾进行端到端建模，并将在相同工况下与实验定量验证。