Aerodynamic performance of transonic Bethe-Zel'dovich-Thompson flows past an airfoil

被引:22
作者
Cinnella, P [1 ]
Congedo, PM [1 ]
机构
[1] Univ Lecce, Dept Engn Innovat, I-73100 Lecce, Italy
关键词
D O I
10.2514/1.8627
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
Dense gasdynamics studies the flow of gases in the thermodynamic region above the upper saturation curve, close to the liquid-vapor critical point. In recent years, great attention has been paid to certain substances, known as the Bethe-Zel'dovich-Thompson (BZT) fluids, which exhibit negative values of the fundamental derivative of gasdynamics for a whole range of temperatures and pressures in the vapor phase. This can lead to nonclassical gasdynamic behaviors, such as rarefaction shock waves, mixed shock/fan waves, and shock splitting. The uncommon properties of BZT fluids can find practical applications, for example, in the reduction of losses as a result of wave drag and shock/boundary-layer interaction in organic Rankine cycle turbines. The present work provides a detailed numerical study of transonic BZT fluid flows past a simplified configuration, represented by an isolated NACA0012 airfoil. The objective is to investigate the influence of BZT effects on the airfoil performance (specifically on the lift-to-drag ratio).
引用
收藏
页码:370 / 378
页数:9
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