Numerical Simulations of Thermal Environment of the Rocket Impingement Jet with Afterburning under Different Water Spray Angles

In order to gain a knowledge of the heat emitted from a variety of sources at the blind heading of an underground gold mine, the present study conducts an in situ measurement study in a blind heading within the load haul dumps (LHDs) that are operating. The measurements can provide a reliable data basis for the setting of numerical simulations. The results demonstrate that the distances between the forcing outlet and the mining face (denoted as Zm), as well as the heat generation from LHDs (denoted as QL), has brought significant impacts on the airflow velocity, relative humidity, and temperature distributions in the blind heading. Setting Zm to 5 m could achieve a relative optimal cooling performance, also indicating that when the LHD is fully operating in the mining face, employing the pure forcing system has a limited effect on the temperature decrease of the blind heading. According to the numerical simulations, a better cooling performance can be achieved based on the near-forcing-far-exhausting (NFFE) ventilation system.

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Influence of radiation on predictive accuracy in numerical simulations of the thermal environment in industrial buildings with buoyancy-driven natural ventilation

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2015.11.105 ◽

2016 ◽

Vol 96 ◽

pp. 473-480 ◽

Cited By ~ 21

Author(s):

Xiaojing Meng ◽

Yi Wang ◽

Tiening Liu ◽

Xiao Xing ◽

Yingxue Cao ◽

...

Keyword(s):

Numerical Simulations ◽

Natural Ventilation ◽

Predictive Accuracy ◽

Thermal Environment ◽

Industrial Buildings

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Numerical Simulations for Super Large-Scale Natural Draft Cooling Tower With an Optimized Non-Uniform Water Distribution

Volume 8: Computational Fluid Dynamics (CFD) and Coupled Codes; Nuclear Education, Public Acceptance and Related Issues ◽

10.1115/icone25-67057 ◽

2017 ◽

Author(s):

J. Y. Li ◽

H. Wang ◽

W. Sheng

Keyword(s):

Numerical Simulations ◽

Water Distribution ◽

Large Scale ◽

Cooling Tower ◽

Water Pressure ◽

Water Spray ◽

Natural Draft ◽

Precise Data ◽

Spray Density ◽

Autumn And Winter

The great spray area of a Super Large-Scale Natural Draft Cooling Tower (SLNDWCT) makes it difficult to achieve an uniform wind field, and non-uniform water spray distributions are adopted in engineering. In this paper, to improve the cooling performance, optimized non-uniform water spray distributions are designed by utilizing network hydraulic calculations and numerical simulations. In the network calculations, the node-formula is applied to figure out the water pressure and flow rate of each spray nozzle, providing more precise data in simulations for the heat and mass transfer. Simulations for operating in summer, Spring/Autumn and winter seasons, which are different in water spray density, have been presented. In the operating in summer, the spray zone is divided into two regions (inner and outer regions), and by adjusting the water spray density and areas of the two regions, an improved water distribution is achieved.

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