Orthogonal analysis of the influencing factors of gas-solid two-phase jet particles
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摘要: 气固两相颗粒喷射技术应用广泛，故对其影响因素的研究具有重要的工程意义。首先利用正交实验设计原理对压强与质量2个因素进行安排实验；然后基于CFD-DEM模型利用FLUENT进行数值模拟，将计算的结果进行极差分析和方差分析；最后设计一套喷射实验，拍摄颗粒喷射轨迹，并将拍摄图片进行颜色直方图处理。得出以下结论：通过极差分析和方差分析得出压强的影响大于质量，且当压强为0.3 MPa、质量为2 g时，其均值最小；当压强取值为0.3 MPa、质量取值为2 g时，其喷射效果达到最优化，且拍摄的效果最佳，与数值模拟的结果一致。Abstract: Since the gas-solid two-phase particle injection technology is widely used, it is of great engineering significance to study its influencing factors. Firstly, to inverstigate two factors, pre-ssure and mass, experiments are arranged by the orthogonal experimental design principle. Then, based on the CFD-DEM model, the FLUENT software is used for numerical simulation, and the results are analyzed by range analysis and variance analysis. Finally, a set of jet experiments is designed to obtain the particle injection trajectory, and the photographs are processed by color histogram. The following conclusions are drawn: the influence of pressure is greater than that of mass by range analysis and variance analysis, and the mean value is the smallest when the pressure is 0.3 MPa and the mass is 2 g. When the pressure is 0.3 MPa and the mass is 2 g, the injection effect is optimized, and the shooting effect is the best, which is consistent with the results of numerical simulation.
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Key words:
- gas-solid two-phase /
- orthogonal analysis /
- CFD-DEM /
- numerical simulation /
- color histogram
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图 4 喷射颗粒的数值模拟图和拍摄轨迹图(P=0.3 MPa，m=2 g)
Figure 4. Numerical simulations of the sprayed particles and the trajectory of the shot (P=0.3 MPa, m=2 g)
表 1 Specified parameters
Table 1. Specified parameters
Factors Exp. 1 Exp. 2 Exp. 3 Exp. 4 Exp. 5 Exp. 6 Exp. 7 Exp. 8 Exp. 9 Exp.10 Exp.11 Exp.12 Exp.13 Exp.14 Exp.15 Exp.16 Pressure/MPa 0.2 0.2 0.2 0.2 0.3 0.3 0.3 0.3 0.4 0.4 0.4 0.4 0.5 0.5 0.5 0.5 Quality/g 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 
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表 2 Tracking the number of particles trapping and the total number of particles (500 steps)
Table 2. Tracking the number of particles trapping and the total number of particles (500 steps)
Factors Exp.1 Exp.2 Exp.3 Exp.4 Exp.5 Exp.6 Exp.7 Exp.8 Exp.9 Exp.10 Exp.11 Exp.12 Exp.13 Exp.14 Exp.15 Exp.16 Trap number 40 74 81 66 42 21 39 31 44 30 35 41 66 45 42 87 Total number 321 327 259 251 186 215 146 349 146 151 93 114 143 190 140 179
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表 3 Variance analysis of pressure and quality impact
Table 3. Variance analysis of pressure and quality impact
Factors Square of
devianceDegree of
freedomF
ratioF
critical-valuePressure 0.093 3 1.431 4.760 Quality 0.037 3 0.569 4.760 Error 0.130 6 — —
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表 4 Experimental measurement instrument list
Table 4. Experimental measurement instrument list
Serial number Device name Model number Manufacturing company 1 Air compressor OD1012 FujianJuba Machinery Co. LTD 2 Ball valve FG-55658 FEGEER 3 DMF-Z DMF-Z-20 CHCR 4 Powder particle —— HenanSuhe Biotechnology Co. LTD 5 Electronic scales JM1003 Yuyao Jiming Weighing and Verifying Equipment Co. LTD 6 High-speed camera Fastcam Ultima APX Photron Corporation of Japan
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