Shenyang Engineering College

Shenyang, China

Shenyang Engineering College

Shenyang, China
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Shi J.-R.,Shenyang Engineering College | Xu Y.-N.,Shenyang Engineering College | Xue Z.-J.,Shenyang Engineering College | Xie M.-Z.,Dalian University of Technology
Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power | Year: 2010

A one-dimensional numerical simulation was performed of the combustion characteristics of a premixed gas in a dual-layer porous medium burner. The super-adiabatic combustion and stable flame zone in the burner under discussion were mainly studied. The research results show that the premixed gas can produce super-adiabatic combustion to a certain extent inside the dual-layer porous medium and the lean combustion limits can be extended to 0.45. The dual-layer porous medium can stabilize the flame at the interface within a relatively wide flow speed range. The minimum and maximum flame promulgation speeds obtained from a numerical prediction assume a same tendency as the test ones, which are at least three times higher than those in a free space.


Xu Y.-N.,Shenyang Engineering College | Shi J.-R.,Shenyang Engineering College | Xue Z.-J.,Shenyang Engineering College | Xie M.-Z.,Dalian University of Technology
Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power | Year: 2010

By establishing a two-dimensional numerical model, studied were the porous medium combustion-combustion and heat transfer inside a heat exchanger and the influence of the system configuration on the thermal efficiency and the pressure drop of a combustion-heat exchanger. The research results show that the longitudinal distance of the heat exchange tubes has a remarkable influence on the temperature distribution, heat transfer speed and pressure loss inside the heat exchanger. To decrease the longitudinal distance of the heat exchange tubes can increase the thermal efficiency and pressure loss. The horizontal distance of the heat exchange tubes, however, has a very little influence on the thermal efficiency and pressure loss. In addition, to increase the diameters of small balls may result in an increase of the thermal efficiency and a sharp decrease of the pressure loss. The effectiveness of the numerical model can be verified through tests.


Li Z.,Shenyang Engineering College | Wang Y.-S.,Shenyang Engineering College | Song Z.-Y.,China Electric Power Research Institute
Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power | Year: 2016

In combination with the commissioning test of a 350 MW unit newly built in Huarun Electric Power Corporation Panjin thermal power plant, a simulation study was performed of the in-furnace aerodynamic characteristics of its boiler. By making use of the CFD software Fluent, with the parameters under the actual test conditions serving as the boundary conditions, a full spectrum of three-dimensional simulation of the internals inside the furnace was performed. The in-furnace speed field was obtained through calculation and the simulation and calculation results were contrasted and verified with the speed field actually measured in a section of the furnace. It has been found that the calculation results are basically in agreement with the values actually measured, therefore, the rationality of the simulation model and the simulation calculation method are verified. In the meantime, the calculation results show that the distribution of the primary air, secondary air and SOFA air in various sections is rational and the air flow intersection locations are good. In addition, the distribution of the turbulent flow intensity in the furnace relatively difficult to be actually measured can be obtained through the simulation calculation and the calculation results indicates that the distribution is rational, thus instrumental to the stable combustion inside the furnace and enhancing the combustion efficiency. The research results have been applied in the commissioning work of the foregoing unit and the test run processes were simplified to a certain extent, thus making the work load lessened and an even richer and intuitive test results obtained. © 2016, Editorial Department of "Journal of Engineering for Thermal Energy and Power". All right reserved.

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