Numerical Simulation of Transpiration Cooling within Variable Property of Water and Steam. (March 2019)

• Record Type: Journal Article
• Authors: Wang, Meng; He, Fei; Wu, Nan; Wang, Jianhua; Dong, Guangqi
• Is Part Of: IOP conference series. Volume 491(2019)
• Publication Date: 2019-03
• Subjects: Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/491/1/012022
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: Transpiration cooling with coolant phase change provides a wide range of applications in effective thermal protection. Water is usually employed as the coolant and experiences huge temperature and pressure changes during the transpiration cooling process. Mathematical model and numerical approach of transpiration cooling with phase change in consideration of the real variation of water thermodynamic properties are established in this paper, and compared with the constant property model. The IWAPS Industrial Formulation 1997 is used to calculate the thermodynamic properties of water in wide ranges of temperature and pressure. The numerical results obtained indicate some thermodynamic properties vary significantly with temperature and pressure, leading to higher phase change temperature and coolant driving force. With the increase of mass flow rate, the two property models exhibit the similar changing trend in temperature and pressure and there is a lag in the start and end positions of phase change.