An Experimental Investigation on the Analogous Transpiration Cooling Utilizing Hydrogels as Coolants

4th International Conference on Mechanical and Aeronautical Engineering

机械制造;航空航天工程

Qian, Kang^1 ; Wu, Yadong^2 ; Zhou, Zihe^1 ; Wu, Nan^1 ; He, Fei^1 ; Wang, Jianhua^1 ; Wang, Meng^1

Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Jinzhai Road 96, Hefei

230027, China^1

Beijing Institute of Astronautical System Engineering, Beijing

100076, China^2

关键词: Cooling effects;    Cooling performance;    Critical temperatures;    Experimental investigations;    Liquid coolant;    Superabsorbent polymer;    Temperature rising;    Transpiration cooling;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/491/1/012015/pdf
DOI  :  10.1088/1757-899X/491/1/012015

学科分类：航空航天科学

来源: IOP

【 摘 要 】

In the applications of transpiration cooling, water acting as a liquid coolant shows excellent cooling performances due to its huge heat capacity and latent enthalpy. However, the fluidity of liquid water could cause extra difficulties on occasions where unexpected interferences to the system balance should be avoided. To overcome the above issue, we propose a new transpiration cooling pattern, in which the liquid water is solidified and stored as hydrogels. In this work, the hydrogel was prepared from the superabsorbent polymer (SAP) and thermogravimetric analysis was conducted to test the water release property and upper critical temperature. Respectively using water and hydrogels as coolant, transpiration cooling experiments on a homemade porous plate were carried out to explore the feasibility and cooling performance of the new transpiration cooling pattern. The results implied that the transpiration cooling with hydrogels and water can both slow down the temperature rising of the structure. The hydrogel can provide considerable cooling effect and is superior for prolonging service time.