NUCLEAR TECHNIQUES, Volume. 46, Issue 9, 090503(2023)
Melting behavior of in-flight particles in supersonic plasma jets
Figures & Tables(13)
Fig. 1. (a) Computational model of plasma spraying with a de Laval nozzle, (b) In-flight particles simulation in the de Laval nozzle
Fig. 2. Velocity and temperature distribution of a plasma jet under different spraying parameters (a) Velocity distribution, (b) Temperature distribution
Fig. 3. Maximum velocity and temperature of plasma jet center under different spraying parameters
Fig. 4. Velocity (a) and temperature (b) distribution in plasma jet under different spraying parameters
Fig. 5. Velocity (a) and temperature (b) distribution of plasma jet and in-flight particles at different spraying distances
Fig. 6. Average velocities, temperatures, and drag forces of in-flight particles at different spraying distances
Fig. 7. Average velocity (a), temperature distributions (b), and drag force (c) of in-flight particles relative to spraying distance
Table 1. Spray parameters of YSZ coatings
View tableView in ArticleTable 1. Spray parameters of YSZ coatings
喷涂参数
Spraying parameter
电流
Current / A
Ar流量
Primary gas Ar / slpm
H2流量
Secondary gas H2 / slpm
电压
Voltage / V
喷涂距离
Stand-off distanceD / mm
送粉率
Feeding rate / g∙min-1
功率
Power / kW
N1 497 142 26 143 110 30 71 N2 430 140 20 131 110 35 56 N3 324 130 16 128 90 40 42 N4 300 120 10 120 110 50 36
Table 2. Physical property parameters of YSZ particles[30]
View tableView in ArticleTable 2. Physical property parameters of YSZ particles[30]
喷涂粒子参数Spraying particle parameters 数值Values 粒子直径 Particle diameters / µm 10~50 送粉率 Feed rate / g∙min-1 30~50 初始温度 Initial temperature / K 300 密度 Density / g∙cm-3 5.89 比热容 Specific heat / J∙kg-1∙K-1 580 熔点温度 Melting temperature / K 2 950 热导率 Heat conductivity / W∙m-1∙K-1 2.0
Table 3. De Laval nozzle calculation model condition parameters[31]
View tableView in ArticleTable 3. De Laval nozzle calculation model condition parameters[31]
参数Parameters 数值Values 喷嘴出口直径 Nozzle outlet diameter / mm 5.6 喷嘴长度 Nozzle length / mm 44 外部计算环境的直径Diameter of the external computing environment / mm 109.54 外部计算环境长度Length of the external computing environment / mm 250 大气压 Atmospheric pressure / MPa 0.1 阴极热导率Thermal conductivity of cathode / W∙m-1∙K-1 190 阳极热导率Thermal conductivity of anode / W∙m-1∙K-1 398 主气入口 Primary gas inlet / K 1 000 送粉口入口 Powder inlet / K 500 阴极端面 Cathode face / K 3 500 阳极表面 Anode surface / K 1 000 出口 Outlet / K 500
Table 4. Comparison of average monitoring and simulation results of velocities of in-flight particles
View tableView in ArticleTable 4. Comparison of average monitoring and simulation results of velocities of in-flight particles
喷涂参数Spraying parameters 在线监测Monitoring results 模拟计算Simulation results 相对误差Relative error / % V / m∙s-1 V / m∙s-1 N1 495 553 12 N2 496 569 15 N3 458 506 10 N4 456 485 6
Table 5. Comparison of average monitoring and simulation results of temperatures of in-flight particles
View tableView in ArticleTable 5. Comparison of average monitoring and simulation results of temperatures of in-flight particles
喷涂参数
Spraying parameters
在线监测Monitoring results 模拟计算Simulation results 相对误差Relative error / % T / K T / K N1 3 302 3 533 7 N2 3 222 3 480 8 N3 3 055 3 182 4 N4 2 979 3 128 5
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Lei ZHANG, Hongsheng CHEN, Jianhe LIU, Jiabin YANG, Yunlong LIU, Jinde WU. Melting behavior of in-flight particles in supersonic plasma jets[J]. NUCLEAR TECHNIQUES, 2023, 46(9): 090503
Paper Information
Category: Research Articles
Received: Apr. 24, 2023
Accepted: --
Published Online: Oct. 8, 2023
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