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	Numerical Prediction of Film Cooling Effectiveness over Flat Plate using Variable Turbulent Prandtl Number Closures
	Ochrymiuk, T.
	2016
关键词	turbulent heat flux two-equation model turbulent Prandtl number film cooling compound-angle injection crystal image method gas-turbine blade
中文摘要	The pinch point is important for analyzing heat transfer in thermodynamic cycles. With the aim to reveal the importance of determining the accurate pinch point, the research on the pinch point position is carried out by theoretical method. The results show that the pinch point position depends on the parameters of the heat transfer fluids and the major fluid properties. In most cases, the pinch point locates at the bubble point for the evaporator and the dew point for the condenser. However, the pinch point shifts to the supercooled liquid state in the near critical conditions for the evaporator. Similarly, it shifts to the superheated vapor state with the condensing temperature approaching the critical temperature for the condenser. It even can shift to the working fluid entrance of the evaporator or the supercritical heater when the heat source fluid temperature is very high compared with the absorbing heat temperature. A wrong position for the pinch point may generate serious mistake. In brief, the pinch point should be founded by the iterative method in all conditions rather than taking for granted.
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/113082]
专题	工程热物理研究所_Journal of Thermal Science_期刊论文
作者单位	[Ochrymiuk, Tomasz] Polish Acad Sci IMP PAN, Inst Fluid Flow Machinery, Fiszera 14, PL-80952 Gdansk, Poland.
推荐引用方式 GB/T 7714	Ochrymiuk, T.. Numerical Prediction of Film Cooling Effectiveness over Flat Plate using Variable Turbulent Prandtl Number Closures[J],2016.
APA	Ochrymiuk, T..(2016).Numerical Prediction of Film Cooling Effectiveness over Flat Plate using Variable Turbulent Prandtl Number Closures..
MLA	Ochrymiuk, T.."Numerical Prediction of Film Cooling Effectiveness over Flat Plate using Variable Turbulent Prandtl Number Closures".(2016).

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