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Luan H.-B.,Csic No 711 Research Institute | Chen B.,Csic No 711 Research Institute | Zheng W.-Y.,Csic No 711 Research Institute | Tao W.-Q.,Xi'an Jiaotong University
Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power | Year: 2014

A numerical simulation and experimental study were performed of the heat transfer and heat exchange characteristics of a round plate and shell heat exchanger. By using the software Solidworks, a full scale real-entity model for a single flow passage was established during the numerical simulation without any simplification, dividing the grid by employing the software ICEM and seeking solutions by adopting the software Fluent. In addition, the simulation results were verified through a pilot-scale water-water heat transfer test. The prototype machine for the test used the plates fully identical to the geometrical structure during the numerical simulation with the number of the plates being 122. Through a comparison, it has been found that when the Reynolds number is in a range from 200 to 7000, the error between the numerical simulation results and the test ones is within 15%. The simulation results can be used as an underlying basis for type selection and optimization during design of the products of the same kind in industrial applications.

Sun H.-Y.,Csic No 711 Research Institute | Liu Z.-H.,Csic No 711 Research Institute | Liu J.-B.,Csic No 711 Research Institute
Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power | Year: 2010

To meet the requirement of a small-sized hot air engine for combustion under a normal temperature and pressure condition, designed was a disk type eddy flow gas burner on the basis of a numerical simulation. Experimentally studied were the temperature distribution and flame morphology in the combustor under the following conditions: various hole-opening modes, loads and excess air factors. The research results show that the gas holes are inner ones and the air assumes a rotation flow. Under the condition that the outer diameter of the burner is reduced to around 2/5 of its original, the gas and air will be mixed uniformly with the combustion being stable and flame transparent, away from the walls and not directly heating the head of the heater. The high temperature zones are distributed properly and meet the requirements of the hot air engine for combustion.

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