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| Contrast and analysis between 2D and 3D flow field of jet mixing apparatus |
| Qiu Baijing, Xu Xichao |
| (Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education ＆ Jiangsu Province, Jiangsu University, Zhenjiang, Jiangsu 212013, China) |
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Abstract Aimed at investigating the design method and test method of jetmixing apparatus, numerical simulation and experiment research were both used to investigate the internal flow field of jet mixing apparatus. In the numerical simulation,3D model of jet mixing apparatus were established.With no consideration of the internal flow field in the near suction pipe,2D axisymmetric model was also established, and then numerical simulation scheme for both 2D axisymmetric model and 3D model flow interior field were set up. Numerical investigation for their interior flow field were performed with CFD software Fluent. It is found that compare to 3D model, the 2D axisymmetric model can save 64％ CPU time for the same case. In the experiment research, mixing test bench was constructed, and performance parameters of jet mixing apparatus were recorded. The experimental data were used to validate the numerical data. Results show that the simulated results and experiment results agree well with each other. The average relative deviation was 4.14％,and maximum relative deviation was 7.41％ for 2D axisymmetric model. The average relative deviation was 3.41％and maximum relative deviation was 5.13％ for 3D model. The established models can be used in engineering calculations.
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Received: 13 December 2010
Published: 30 September 2011
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