Sublimation Heat Transfer of Dry Ice Particle Spray with Array Laval Nozzle

Table 1. Mesh independence validation
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Table 1. Mesh independence validation
Grid quantity Mean temperature of heat source /K
845100 276.55
986540 271.60
1020970 268.31
1134080 268.15

Table 2. Material parameters

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Table 2. Material parameters

Grid quantity	Specific heat capacity / ［J/（kg·K）］	Density / （kg/m³）	Heat conductivity coefficient /［W/（m·K）］	Dynamic viscosity / （Pa·s）	Specific heat rate
845100	770	110	5	5×10^-6	1.3745
986540	C_p（T）	ρ（p，T）	k（T）	η（T）	1.3
1020970	385	8960	400
1134080	1146	0.0022	5300

Table 3. Exit velocity and laser surface temperature corresponding to different throat diameters
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Table 3. Exit velocity and laser surface temperature corresponding to different throat diameters
Throat
diameter /mm
Maximum
temperature /K
Average
temperature /K
Exit velocity /
（m/s）
3 295.64 239.74 36.77
4 312.25 268.31 20.09
5 337.58 300.19 12.53
6 357.49 323.77 7.12

Table 4. Surface temperature of the laser corresponding to different throat diameters

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Table 4. Surface temperature of the laser corresponding to different throat diameters

Throat diameter / mm	Temperature /K					Experimental mean temperature /K	Simulated mean temperature /K	Relative error /%
Throat diameter / mm	Measurement point 1	Measurement point 2	Measurement point 3	Measurement point 4	Measurement point 5	Experimental mean temperature /K	Simulated mean temperature /K	Relative error /%
4	273.02	272.87	272.55	272.67	273.00	272.82	268.31	1.68
5	304.79	303.88	303.54	304.90	304.81	304.38	300.19	1.39
6	328.04	327.41	327.00	327.55	327.79	327.56	323.77	1.17

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Jinghong Ning, Luyao Sun, Qingyu Zhang, Ziliang Ren, Zhipeng Song, Sen Zhu. Sublimation Heat Transfer of Dry Ice Particle Spray with Array Laval Nozzle[J]. Chinese Journal of Lasers, 2024, 51(22): 2201010

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