Researching | Numerical modeling and validation of evaporation and discharge of low-level radioactive wastewater based on high-pressure spray technology

NUCLEAR TECHNIQUES, Volume. 46, Issue 9, 090502(2023)

Numerical modeling and validation of evaporation and discharge of low-level radioactive wastewater based on high-pressure spray technology

Derui YANG¹, Siyuan WU¹, Baojie NIE¹, Weiguo GU¹, Bo WANG², Dezhong WANG^1、*, and Ailing ZHANG^2、*

Author Affiliations

¹School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

²Ministry of Ecology and Environment, Nuclear and Radiation Safety Center, Beijing 100082, China

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Figures & Tables(8)

Fig. 1. Schematic diagram of high-pressure spray evaporation technology

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Fig. 2. Mesh diagram of computational domain and spray nozzle

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$Grid convergence of evaporation fraction along with distance from nozzle$

Fig. 3. Grid convergence of evaporation fraction along with distance from nozzle

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Fig. 4. Relative light intensity comparison between numerical simulation and experimental results for cases I (a) and II (b)

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Fig. 5. Plume trajectory of droplet dispersion for case III

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Table 1. Three cases used to validate numerical modeling

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Table 1. Three cases used to validate numerical modeling

参数Parameter

工况I Case I

工况II Case II

工况III Case III

速度Velocity / m∙s^-1

3.98

3.98

1.27

含湿量Specific humidity / g∙kg^-1

13.61

8.20

8.10

相对湿度Relative humidity / %

温度Temperature / ºC

喷嘴流量Mass flow rate of nozzle / kg∙h^-1

83.91

21.60

3.12

50.86

21.60

3.16

49.14

21.90

5.55

Table 2. Comparison of droplet Salter mean diameter variation and distance from nozzle

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Table 2. Comparison of droplet Salter mean diameter variation and distance from nozzle

工况Case	距喷嘴距离Distance / m	模拟Simulation / $μ m$	实验Experiment / $μ m$	相对误差Relative error / %
工况ICase I	0.15	27.72	27.94	4.37
	1.0	27.48	26.90	2.16
	2.0	28.15	26.35	6.85
	3.0	27.98	25.51	9.67
	4.0	27.86	24.52	13.62
工况IICase II	0.15	26.46	26.64	0.67
	1.0	27.56	26.52	3.92
	2.0	26.47	25.44	4.05
	3.0	26.12	24.13	8.27
	4.0	25.86	23.08	12.04

Table 3. Comparison of droplet deposition and distance from nozzle

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Table 3. Comparison of droplet deposition and distance from nozzle

工况Case	距喷嘴距离Distance / m	模拟Simulation / g∙h^-1	实验Experiment / g∙h^-1	相对误差Relative error / %
工况IIICase III	1.0	0.120 0	0.114 6	4.71
	2.0	0.382 8	0.414 6	7.67
	3.0	0.963 0	1.026 0	6.14
	4.0	0.955 8	1.127 4	15.22
	5.0	0.638 4	0.654 0	2.39

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Derui YANG, Siyuan WU, Baojie NIE, Weiguo GU, Bo WANG, Dezhong WANG, Ailing ZHANG. Numerical modeling and validation of evaporation and discharge of low-level radioactive wastewater based on high-pressure spray technology[J]. NUCLEAR TECHNIQUES, 2023, 46(9): 090502

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Paper Information

Category: Research Articles

Received: Mar. 28, 2023

Accepted: --

Published Online: Oct. 8, 2023

The Author Email:

DOI:10.11889/j.0253-3219.2023.hjs.46.090502

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