加速度环境中环路热管稳态工作性能对比

doi:10.7527/S1000-6893.2022.26803

Abstract

Abstract:

Loop heat pipes have significant application potential in the cooling field of airborne electronic equipment. Two sets of ammonia-stainless steel dual compensation chamber loop heat pipes with different line lengths were used， and an experimental platform was built to obtain the working performance of loop heat pipes under the acceleration condition. The steady-state performance of two loop heat pipes under gravity， 1g to 7g inverse acceleration conditions and 100 W to 300 W heat loads was experimentally studied. Combined with the force analysis of working fluid， a prediction model of total flow resistance of loop heat pipes under the acceleration condition was established. The influence law and mechanism of different acceleration， heat loads and heat pipe structures on the working performance of loop heat pipes were analyzed. The results showed that the variation curve of the operating temperature of the loop heat pipe with heat load presented a “V” shape under gravity. The inverse acceleration would cause the increase of loop flow resistance， resulting in the increase of working temperature or even overtemperature， particularly for the loop heat pipe with long liquid pipelines. The operating temperature of the heat pipe with a long liquid line was lower than that of the heat pipe with a long vapor line with 1g and 3g inverse acceleration and small heat loads， while it was the opposite with 5g and 7g inverse acceleration. Under gravity and the acceleration condition， the critical heat load of both the variable heat conductance zone and the constant heat conductance zone was about 200 W. The experimental results provide certain guidance for the design and installation of loop heat pipes.

Key words: electronic equipment cooling, loop heat pipe, dual compensation chamber, overload acceleration, flow resistance

CLC Number:

V245

Siyuan LIU, Yongqi XIE, Jian SU, Hongxing ZHANG, Guoguang LI. Steady-state working performance of loop heat pipes in acceleration environment: Comparative study[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023, 44(4): 126803-126803.

Figures/Tables 14

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References 28

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部件	参数	DCCLHP-1	DCCLHP-2
蒸发器	材料	不锈钢
	外径、内径、长度/mm	20，18，200
毛细芯	外径、内径、长度/mm	18，6，190
	孔半径/m	1.5×10^-6
	孔隙率/%	48.5
	渗透率/m²	>5.0×10^-14
储液器	材料	不锈钢
	外径、内径、长度/mm	27，25，64
	数量	2
蒸气管线	材料	不锈钢	不锈钢
	外径、内径、长度/mm	3，2.6，300	3，2.6，1 100
冷凝管线	材料	不锈钢	不锈钢
	外径、内径、长度/mm	3，2.6，2 200	3，2.6，2 200
液体管线	材料	不锈钢	不锈钢
	外径、内径、长度/mm	3，2.6，600	3，2.6，400

工况	具体参数
加速度大小	0，1g，3g，5g，7g
热载荷/W	100，150，200，250，300
冷却水进口温度/℃	19~21

[1]	NING Xianwen, LI Jindong, WANG Yuying, JIANG Fan. Review on construction of new spacecraft thermal control system in China [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(7): 22874-022874.
[2]	Feng Jianting;Lin Guiping;Bai Lizhan. Experimental Investigation on Steady-state Operating Characteristics of a Dual Compensation Chamber Loop Heat Pipe [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2010, 31(8): 1558-1564.
[3]	Bai Lizhan;Lin Guiping;Zhang Hongxing. Experimental Study on Steady-state Operating Characteristics of Gravity-assisted Loop Heat Pipes [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2008, 29(5): 1112-1117.

Steady-state working performance of loop heat pipes in acceleration environment: Comparative study

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