Numerical simulation of heat dissipation processes in underground power cable system situated in thermal backfill and buried in a multilayered soil

Simulation of complete liquid–vapour phase change process inside porous evaporator using local thermal non-equilibrium model

Numerical simulation of complete liquid–vapour phase change process inside porous media: A comparison between local thermal equilibrium and non-equilibrium models

Simulation of liquid–vapour phase change process inside porous media using modified enthalpy formulation

Numerical simulation of complete liquid–vapour phase change process inside porous media using smoothing of diffusion coefficient

Numerical investigation of vapor–liquid heat and mass transfer in porous media

This study analyses the influence of swirler vane angle (β) on the combustion characteristics of premixed lean hydrogen-air flame in a swirl micro-combustor via numerical simulations. The results show that lower flammability limit (LFL) under β = 15° is larger than that of β = 0°; and β = 30°, 45° and 60° have very little difference in the LFL, and their LFL are smaller than that of β = 0° Flame anchoring mainly depends on the corner recirculation zone (CRZ) when β is 0° and 15°, and when β exceeds 30°, flame anchoring is chiefly determined by the inner recirculation zone (IRZ). The flame stabilization ability of IRZ is stronger than that of CRZ, but excessive swirling intensity will increase the length of IRZ, which in turn results in a decrease in stabilization ability. Increasing β improves outer wall temperature when inlet velocity is relatively small. Under a larger inlet velocity, an enormous β reduces combustor thermal performance and combustion efficiency due to the downstream movement of flame root and reaction zone. This work helps us to better understand the swirling flame characteristics in micro-combustor and provides guidance for the design and optimization of swirl micro-combustor. 

Effect of swirler vane angle on the combustion characteristics of premixed lean hydrogen-air mixture in a swirl micro-combustor

In this paper, experimental study was done on heat transfer of semi-open two-phase thermosyphon which is a new type of device for heat exchange. The results of study indicate that semi-open two-phase thermosyphon has two transition points of heat transfer. The best working condition in practice is between the two transition points. This paper also presented the experimental results of the capability of heat transfer with variation of the ratio of length, diameter of vent and location of vent, and provided important experimental data for reasonable design of semi-open two-phase thermosyphon. 

Zhengchang Song

Papers

Numerical investigation of vapor–liquid heat and mass transfer in porous media

Effect of swirler vane angle on the combustion characteristics of premixed lean hydrogen-air mixture in a swirl micro-combustor

Experimental investigation on the nature of heat transfer of semi-open two-phase thermosyphon