Influences of spray chamber pressure and nozzle bore diameteron spray cooling performance

Liu Jionghui; Sun Wan; Liu Xiufang; Hou Yu

doi:10.3788/HPLPB20132510.2546

Volume 25 Issue 10

Sep. 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(10): 2546-2550

Liu Jionghui, Sun Wan, Liu Xiufang, et al. Influences of spray chamber pressure and nozzle bore diameteron spray cooling performance[J]. High Power Laser and Particle Beams, 2013, 25: 2546-2550. doi: 10.3788/HPLPB20132510.2546

Citation:

Liu Jionghui, Sun Wan, Liu Xiufang, et al. Influences of spray chamber pressure and nozzle bore diameteron spray cooling performance[J]. High Power Laser and Particle Beams, 2013, 25: 2546-2550. doi: 10.3788/HPLPB20132510.2546

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Influences of spray chamber pressure and nozzle bore diameteron spray cooling performance

doi: 10.3788/HPLPB20132510.2546

Liu Jionghui¹,
Sun Wan¹,
Liu Xiufang¹,
Hou Yu^{1,2
,
,},

1.
School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;
2.
State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China

Received Date: 2012-12-26
Rev Recd Date: 2013-05-24
Publish Date: 2013-09-22

Abstract

Abstract

In order to meet the cooling requirements of high-power laser devices, the influences of spray chamber pressure and nozzle bore diameter on the spray cooling performance were experimentally studied in a closed spray cooling system with R22 as refrigerant. When the inlet pressure was 0.8 MPa, the spray height was 22 mm and inlet temperature was -3 ℃, the critical heat flux (CHF) increased firstly and then decreased with the increase of spray chamber pressure form 0.2 MPa to 0.4 MPa. In addition, there existed a maximal CHF value with the change of nozzle bore diameter which indicated the spray cooling effect would deteriorate with undersize or oversize nozzle bore diameters. And the cooling surface temperature increased with the increase of spray chamber pressure. The maximal CHF of 276.1 Wcm-2 was obtained with the nozzle diameter of 0.4 mm and the spray chamber pressure of 0.34 MPa, the corresponding cooling surface temperature was 26.8 ℃ and the heat exchange coefficient was 66 640 Wm-2K-1. Bigger or smaller nozzle diameter would weaken the spray cooling performance.
- spray cooling,
- phase change heat transfer,
- critical heat flux,
- spray chamber pressure,
- nozzle bore diameter

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